Dremel 3100 Manual

Also See for 3100:

Operating/safety instructions manual (57 pages)

Table of Contents

Contents

1 Getting to Know Your Product
2 Assembly
3 Operation
4 Maintenance
5 Extension Cords
6 Dremel Accessories
7 Speed Settings
8 Attachment Model A576 - Sanding / Grinding Guide
9 Attachment Model 675 - Lawn Mower Blade Sharpener
10 Replacing Screw Mandrel Accessories
11 Safety Symbols
12 General Power Tool Safety Warnings
13 Safety Rules for Rotary Tools
14 Additional Safety Warnings
15 Intended Use
16 Specifications
17 Symbols
18 Documents / Resources
- 18.1 References
- 18.2 Download manual

Dremel 3100 Manual

Getting to Know Your Product

Model 3100 High Speed Rotary Tool
Overview

On/Off Switch
Shaft Lock Button
Collet Nut
Collet
EZ Twist™ Integrated Wrench / Nose Cap
Shaft

Ventilation Openings
Brush Cover (one on each side)
Hanger
Collet Wrench
Cord

Assembly

Disconnect the plug from the power source before making any assembly, adjustments or changing accessories. Such preventive safety measures reduce the risk of starting the tool accidentally.

Changing Accessories with Collet Wrench

Do not engage lock while the Rotary Tool is running.
(Fig. 2, 3)

To loosen the Collet Nut 3, first press Shaft Lock Button 2 and rotate the shaft by hand until the lock engages the shaft preventing further rotation (Fig. 2).
With the Shaft Lock 2 engaged use the collet Wrench 10 to loosen the Collet Nut 3 if necessary. The collet nut must be loosely threaded on when inserting an accessory.
Change accessories by inserting the new one into the collet as far as possible to minimize runout and imbalance.
Certain applications benefit from having the accessory mounted partially extended from the collet. Ensure that the accessory does not extend beyond 1/2 h in these cases (Fig. 3).
With the shaft lock engaged, finger tighten the collet nut until the accessory shank is gripped by the collet. Avoid excessive tightening of the collet nut when there is no bit inserted.

Changing Accessories with EZ Twist Integrated Wrench / Nose Cap
(Fig. 4)

The nose cap of your tool has an integrated wrench allowing you to loosen and tighten the collet nut without the use of the standard collet wrench.
Unscrew the Nose Cap 5 from the tool, lineup steel insert on inside of cap with Collet Nut 3. With the shaft lock engaged, twist nose cap clockwise to tighten, and counterclockwise to loosen.

Balancing Accessories
For precision work, it is important that all accessories be in good balance (much the same as the tires on your automobile). To true up or balance an accessory, slightly loosen collet nut and give the accessory or collet a 1/4 turn. Re tighten collet nut and run the Rotary Tool. You should be able to tell by the sound and feel if your accessory is running in balance. Continue adjusting in this fashion until best balance is achieved.

Fixing Stuck Collets
(Fig. 5)

It is possible for a collet to get stuck within the collet nut especially if a collet nut is tightened onto the tool without a bit in place.
If this happens, the collet can be removed from the collet nut by pushing the shank of an accessory into the hole in the collet nut. This should cause the collet to pop out of the collet nut.

Hanger
(Fig. 1)
The Hanger 9 is provided for the use of hanging your tool while using the 225 flex shaft attachment or for storage. The Hanger 9 can be unsnapped from the tool in order to hang the tool, however it should be snapped back into place underneath the cord so it will be out of the way while the tool is in use.

Operation

Disconnect the plug from the power source before making any assembly, adjustments or changing accessories. Such preventive safety measures reduce the risk of starting the tool accidentally.

Always observe the following safety precautions in addition to the safety in structions. Failure to do so may result in equipment dam age, property damage, or personal injury.

Whenever you hold the tool, be careful not to cover the air vents with your hand. This blocks the air flow and causes the motor to overheat.

On/Off Switch
(Fig. 6)

The tool is switched "ON" by sliding the On/ Off Switch 1 from the marked "OFF" position to any of the variable speed settings.

Variable Speed Selection
To select the right speed for each job, use a practice piece of material.
The speed of the Rotary Tool is controlled by sliding the On/Off Switch 1 on the housing shown in Fig 6. There are switch setting indicators marked with a line. Slide to the number on the housing to select the operating speed needed from 5,000 – 35,000 RPM.
You can refer to the Speed Setting Tables to determine the proper speed, based on the material being worked and the type of accessory being used. These charts enable you to select both the correct accessory and the optimum speed at a glance.

Settings for Approximate Revolutions Per Min ute
Switch Setting	Speed Range
2	5,000 – 8,000 RPM
*4	9,000 – 15,000 RPM
6	16,000 – 21,000 RPM
8	22,000 – 27,000 RPM
10	28,000 – 35,000 RPM

* Wire Brush Setting.

Needs for Slower Speeds
Certain materials (some plastics and precious metals, for ex ample) require a relatively slow speed because at high speed the friction of the accessory generates heat and may cause damage to the material. Slow speeds (15,000 RPM or less) usually are best for working on delicate projects such as delicate wood carving and fragile model parts. All brushing applications require lower speeds to avoid wire discharge from the holder. See the Speed Settings Tables for recommended operating speeds. Higher speeds are better for carving, cutting, routing, and shaping.
Hardwoods, metals and glass require high speed operation, and drilling should also be done at high speeds.
You can do the great majority of work with the single speed at its regular speed of 35,000 RPM. But for certain materials and types of work, you need slower speeds — which is the reason the variable speed models are available.
Increasing the pressure on the tool is not the answer when it is not performing as you think it should. Perhaps you should be using a different accessory, and perhaps an adjustment in speed would solve the problem. Leaning on the tool does not help.
Let speed do the work!

Do not use external speed controllers, as this can damage the tool's electronics.

Using the Rotary Tool
(Fig. 7, 8)

Always hold the tool away from your face. Accessories can be damaged during handling, and can fly apart as they come up to speed. This is not common, but it does happen.
For best control in close work, grip the Rotary Tool like a pencil between your thumb and forefinger (Fig. 7).
The "Golf Grip" method of holding the tool is used for more aggressive operations such as grinding a flat surface or cutting (Fig. 8).

Maintenance

To avoid accidents always dis connect the tool from the power supply before cleaning or performing any maintenance.

Service

Preventive maintenance pe r formed by unauthorized per so n nel may result in misplacing of internal wires and components which could cause serious hazard. We recommend that all tool service be performed by a Dremel Service Facility.

General Maintenance
The motor in your tool has been engineered for many hours of dependable service. To maintain peak efficiency of the motor, we recommend every 40 - 50 hours the brushes be examined. If your tool runs sporadically, loses power, makes unusual noises or runs at a reduced speed, check the brushes. Only genuine Dremel replacement brushes specially designed for your tool should be used.

Continued use of the tool with worn brushes will permanently damage your tool.
(Fig. 9, 10)
To order replacement carbon brushes for your motor, please contact Dremel Customer Service: 1-800-437-3635.
Follow these steps to check/change the rotary tool brushes:

With the power cord unplugged, place the tool on a clean surface. Use the Collet Wrench as a screwdriver to remove the brush caps in a counter-clockwise direction (Fig. 9).
Remove the brushes from the tool by pulling on the spring that is attached to the carbon brush. If the brush is less than 1/8" long and the end surface of the brush that contacts the commutator is rough and/or pitted, they should be replaced. Check both brushes (Fig. 10).
Usually the brushes will not wear out simul taneously. If one brush is worn out, replace both brushes. Make sure the brushes are installed as illus trated. The curved surface of the brush must match the curvature of the commutator.
After replacing brushes the tool should be run at no-load; place it on a clean surface and run it freely at full speed for 5 minutes before loading (or using) the tool. This will allow the brushes to "seat" properly and will give you more hours of life from each set of brushes. This will also extend the total life of your tool since the com mutator surface will "wear" longer.

Cleaning

Certain cleaning agents and sol vents damage plastic parts. Some of these are: gasoline, carbon tetrachlo ride, chlo rinated cleaning solvents, ammonia and house hold detergents that contain ammonia.
Ventilation openings and switch levers must be kept clean and free of foreign matter. Do not at tempt to clean by inserting pointed objects through openings.

Extension Cords

If an extension cord is necessary, a cord with adequate size conductors that is capable of carrying the current necessary for your tool must be used. This will prevent excessive voltage drop, loss of power or overheating. Grounded tools must use 3-wire extension cords that have 3-prong plugs and receptacles.
NOTE: The smaller the gauge number, the higher the cord capacity.

RECOMMENDED SIZES OF EXTENSION CORDS 120 VOLT ALTERNATING CURRENT TOOLS

Tool's Ampere Rating	Cord Size in A.W.G.				Wire Sizes in mm ²
	Cord Length in Feet				Cord Length in Meters
	25	50	100	150	15	30	60	120
3-6	18	16	16	14	0.75	0.75	1.5	2.5
6-8	18	16	14	12	0.75	1.0	2.5	4.0
8-10	18	16	14	12	0.75	1.0	2.5	4.0
10-12	16	16	14	12	1.0	2.5	4.0	–
12-16	14	12	–	–	–	–	–	–

Dremel Accessories

Use only Dremel® branded accessories. Other accessories are not designed for this tool and may lead to personal injury or property damage.
Store accessories in a dry and temperate environment to avoid corrosion and deterioration. The number and variety of accessories for the Rotary Tool are almost limitless. There is a category suited to almost any job you might have to do and a variety of sizes and shapes within each category which ena bles you to get the perfect accessory for every need.
The accessory categories are as follows; carving / engraving, routing, grinding / sharpening, cutting, cleaning / polishing, sanding, grout removal, drilling and collets / miscellaneous.
For a complete Dremel rotary accessory guide please visit - https://www.dremel.com/binaries/content/assets/dremel/us/other/rotary-accessory-guide.pdf

Speed Settings

The following charts are recommended speeds for each accessory and material type.
Speed Settings:
2 (5,000 - 8,000 RPM)
4 (9,000 - 15,000 RPM)
6 (16,000 - 21,000 RPM)
8 (22,000 - 27,000 RPM)
10 (28,000 - 35,000 RPM)

Model Number	Soft Wood	Hard Wood	Laminates/ Plastics	Steel	Aluminum, Brass, etc.	Shell/ Stone	Ceramic	Glass	Rated Speed (Maximum Operating Speed of Accessory)
Carving / Engraving Accessories
191	10	8-10	4	6	10	—	—	—	35,000
Cutting Accessories
420, 426	6-10	6-10	4-6	8-10	10	6-10	—	—	35,000
Grinding / Sharpening Accessories: Aluminum Oxide (Orange/Brown)
932, 8193	—	—	—	8-10	6-8	—	—	—	35,000
Grinding / Sharpening Accessories: Silicon Carbide (Blue/Green)
83322	—	—	—	—	—	6-8	6-8	8	35,000
Cleaning / Polishing Accessories
414, 422, 429	—	—	—	8-10	6	6	6	6	35,000
425	—	—	—	6-8	6-8	—	—	—	35,000
Sanding Accessories
407, 408, 411, 412, 413, 432	6-8	6-8	6-8	6-8	6-8	6-8	—	—	35,000

Attachment Model A576 - Sanding / Grinding Guide

Using the Sanding/Grinding Guide Attachment

Do not use keyless chuck (model 4486) with this attachment. Only use a collet and collet nut.

For use with 1/2" or less sanding and grinding stone accessories only.

Router bits are not allowed for use with the Sanding/Grinding Guide attachment.
(Fig. 11, 12, 13)
The guide comes completely assembled and ready to use for sanding and grinding applications up to ½" ( 13 mm) thick.
The guide has a 90 and 45 degree bevel for various sanding applications.

Installation instructions:

Remove the Nose Cap 5 from the end of the tool and set nose cap aside (Fig. 11). The original nose cap must be reinstalled when this attachment is not used.
Loosen the Collet Nut 3, insert accessory, and tighten the collet nut (Fig. 12).
Thread the attachment A onto the threaded portion of the housing collar B (Fig. 12).
To adjust the depth of the attachment A (Fig. 13): Loosen the wing knob C, adjust the depth, and tighten the wing knob C.

Attachment Model 675 - Lawn Mower Blade Sharpener

Using the Lawn Mower Blade Sharpener Attachment

Do not use Dremel keyless chuck (model 4486) with this attachment. Only use a collet and collet nut.

Use only Dremel #932 sharpening stone with this attachment. Other stones may not fit attachment or be properly sized or speed rated.

Consult your lawn mower owner's manual for blade maintenance, blade removal, and reinstallation instructions. Cracks in blade body or improper blade removal and reinstallation may lead to serious injury.

Inspect the blade for cracks or missing sections. Replace blade if found cracked or damaged. Cracked or damaged blades can break apart under operation.

Lawn mower blades have sharp edges, which can lacerate hands.

Stone grabbing on the blade corner can kick back and cause loss of control.
(Fig. 14, 15, 16)

Installation instructions:

Remove the Nose Cap 5 from the end of the tool and set nose cap aside (Fig. 14). The original nose cap must be reinstalled when this attachment is not used.
Loosen Collet Nut 3 (Fig. 14).
Insert a new or newly dressed Dremel #932 Aluminum Oxide Grinding Stone D all the way into the collet and tighten the collet nut (Fig. 14).
Screw the Lawn Mower Sharpener Attachment E onto the Dremel Rotary Tool housing (fig. 15).

Sharpen the Lawn Mower Blade:

Place removed blade into a vise or clamp.
Position sharpener attachment over the beveled edge of the blade, keeping at the angle of the guide following the angle of the existing beveled edge (Fig. 16).
Turn on rotary tool and pass over each end of the blade an equal number of times, at the same speed and pressure to keep the blade in balance until edge is sharp.

Balance the Lawn Mower Blade
Drive a nail into a beam or wall. Leave about one inch of straight nail exposed. Place the center hole of the blade over the head of the nail with the blade in a horizontal position. If the blade is balanced, it should remain in a horizontal position. If one side of the blade moves downward, use the grinding stone (without the guide) to remove small amounts of material from the very end of that side of the blade. Remove just enough material from the end to bring the blade to a balanced stop on the nail.

Replacing Screw Mandrel Accessories

Replacing Screw Mandrel Accessories - Step 1 Mandrel 401 is used with the felt polishing tip and wheels. Thread the tip on to the screw carefully. The felt tip must thread down straight on the screw mandrel, and be turned all the way to the collar.

Replacing Screw Mandrel Accessories - Step 2 Mandrel 402 has a small screw at its tip, and is used with emery cutting wheels and sanding discs. Higher speeds, usually maximum, are best for most work, including cutting steel. Which is shown here.

Before each use, check to make certain that all components are assembled to accessory shank and that the drum is sufficiently expanded to secure the band during use. If sanding band is loose on the drum during operation it may "fly" off and strike you or bystanders.
Replacing Screw Mandrel Accessories - Step 3
To replace a band on the 407 Drum Sander, loosen the screw without removing it to contract the drum then slide the old band off. Slide the new sanding band on and then expand the drum by tightening the screw once again.

Safety Symbols

The definitions below describe the level of severity for each signal word.
Please read the manual and pay attention to these symbols.

	This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all safety messages that follow this symbol to avoid possible injury or death.
	DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
	WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
	CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

General Power Tool Safety Warnings

Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.
SAVE ALL WARNINGS AND INSTRUCTIONS FOR FUTURE REFERENCE
The term "power tool" in the warnings refers to your mains-operated (corded) power tool or battery-operated (cordless) power tool.

Work area safety
1. Keep work area clean and well lit. Cluttered or dark areas invite accidents.
2. Do not operate power tools in explosive atmospheres, such as in the presence of flammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
3. Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.
Electrical safety
1. Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodified plugs and matching outlets will reduce risk of electric shock.
2. Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
3. Do not expose power tools to rain or wet conditions. Water entering a power tool will increase the risk of electric shock.
4. Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
5. When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
6. If operating a power tool in a damp location is unavoidable, use a Ground Fault Circuit Interrupter (GFCI) protected supply. Use of an GFCI reduces the risk of electric shock.
Personal safety
1. Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
2. Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat, or hearing protection used for appropriate conditions will reduce personal injuries.
3. Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and / or battery pack, picking up or carrying the tool. Carrying power tools with your finger on the switch or energizing power tools that have the switch on invites accidents.
4. Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury.
5. Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
6. Dress properly. Do not wear loose clothing or jewelry. Keep your hair and clothing away from moving parts. Loose clothes, jewelry or long hair can be caught in moving parts.
7. If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.
8. Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles. A careless action can cause severe injury within a fraction of a second.
Power tool use and care
1. Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
2. Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous and must be repaired.
3. Disconnect the plug from the power source and/or remove the battery pack, if detachable, from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
4. Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
5. Maintain power tools and accessories. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool's operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
6. Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
7. Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.
8. Keep handles and grasping surfaces dry, clean and free from oil and grease. Slippery handles and grasping surfaces do not allow for safe handling and control of the tool in unexpected situations.
Service
1. Have your power tool serviced by a qualified repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.

SAVE THESE INSTRUCTIONS

Safety Rules for Rotary Tools

Safety warnings common for grinding, sanding, wire brushing, polishing, carving or abrasive cutting-off operations:
1. This power tool is intended to function as a grinder, sander, wire brush, polisher, carving or cut-off tool. Read all safety warnings, instructions, illustrations and specifications provided with this power tool. Failure to follow all instructions listed below may result in electric shock, fire and/or serious injury.
2. Do not use accessories which are not specifically designed and recommended by the tool manufacturer. Just because the accessory can be attached to your power tool, it does not assure safe operation.
3. The rated speed of the accessories must be at least equal to the maximum speed marked on the power tool. Accessories running faster than their rated speed can break and fly apart.
4. The outside diameter and the thickness of your accessory must be within the capacity rating of your power tool. Incorrectly sized accessories cannot be adequately guarded or controlled.
5. The arbor size of wheels, sanding drums or any other accessory must properly fit the spindle or collet of the power tool. Accessories that do not match the mounting hardware of the power tool will run out of balance, vibrate excessively and may cause loss of control.
6. Mandrel mounted wheels, sanding drums, cutters or other accessories must be fully inserted into the collet or chuck. If the mandrel is insufficiently held and/or the overhang of the wheel is too long, the mounted wheel may become loose and be ejected at high velocity.
7. Do not use a damaged accessory. Before each use inspect the accessory such as abrasive wheels for chips and cracks, sanding drum for cracks, tear or excess wear, wire brush for loose or cracked wires. If power tool or accessory is dropped, inspect for damage or install an undamaged accessory. After inspecting and installing an accessory, position yourself and bystanders away from the plane of the rotating accessory and run the power tool at maximum no-load speed for one minute. Damaged accessories will normally break apart during this test time.
8. Wear personal protective equipment. Depending on application, use face shield, safety goggles or safety glasses. As appropriate, wear dust mask, hearing protectors, gloves and workshop apron capable of stopping small abrasive or workpiece fragments. The eye protection must be capable of stopping flying debris generated by various operations. The dust mask or respirator must be capable of filtrating particles generated by your operation. Prolonged exposure to high intensity noise may cause hearing loss.
9. Keep bystanders a safe distance away from work area. Anyone entering the work area must wear personal protective equipment. Fragments of workpiece or of a broken accessory may fly away and cause injury beyond immediate area of operation.
10. Hold the power tool by insulated gripping surfaces only, when performing an operation where the cutting accessory may contact hidden wiring or its own cord. Cutting accessory contacting a "live" wire may make exposed metal parts of the power tool "live" and could give the operator an electric shock.
11. Always hold the tool firmly in your hand(s) during the start-up. The reaction torque of the motor, as it accelerates to full speed, can cause the tool to twist.
12. Use clamps to support workpiece whenever practical. Never hold a small workpiece in one hand and the tool in the other hand while in use. Clamping a small workpiece allows you to use your hand(s) to control the tool. Round material such as dowel rods, pipes or tubing have a tendency to roll while being cut, and may cause the bit to bind or jump toward you.
13. Position the cord clear of the spinning accessory. If you lose control, the cord may be cut or snagged and your hand or arm may be pulled into the spinning accessory.
14. Never lay the power tool down until the accessory has come to a complete stop. The spinning accessory may grab the surface and pull the power tool out of your control.
15. After changing the bits or making any adjustments, make sure the collet nut, chuck or any other adjustment devices are securely tightened. Loose adjustment devices can unexpectedly shift, causing loss of control, loose rotating components will be violently thrown.
16. Do not run the power tool while carrying it at your side. Accidental contact with the spinning accessory could snag your clothing, pulling the accessory into your body.
17. Regularly clean the power tool's air vents. The motor's fan will draw the dust inside the housing and excessive accumulation of powdered metal may cause electrical hazards.
18. Do not operate the power tool near flammable materials. Sparks could ignite these materials.
19. Do not use accessories that require liquid coolants. Using water or other liquid coolants may result in electrocution or shock.
20. Use only in well-ventilated area. Working in a safe environment reduces risk of injury.
21. Allow for sufficient space, at least 6" (15.2cm), between your hand and the spinning bit. Do not reach in the area of the spinning bit. The proximity of the spinning bit to your hand may not always be obvious.
22. Do not touch the bit or collet after use. After use the bit and collet are too hot to be touched by bare hands.
23. Do not alter or misuse tool. Any alteration or modification is a misuse and may result in serious personal injury.
Kickback and Related Warnings
Kickback is a sudden reaction to a pinched or snagged rotating wheel, sanding band, brush or any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory which in turn causes the uncontrolled power tool to be forced in the direction opposite of the accessory's rotation.
For example, if an abrasive wheel is snagged or pinched by the workpiece, the edge of the wheel that is entering into the pinch point can dig into the surface of the material causing the wheel to climb out or kickout. The wheel may either jump toward or away from the operator, depending on direction of the wheel's movement at the point of pinching. Abrasive wheels may also break under these conditions.
Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below.
1. Maintain a firm grip on the power tool and position your body and arm to allow you to resist kickback forces. The operator can control kickback forces, if proper precautions are taken.
2. Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory. Corners, sharp edges or bouncing have a tendency to snag the rotating accessory and cause loss of control or kickback.
3. Do not attach a toothed saw blade. Such blades create frequent kickback and loss of control.
4. Always feed the bit into the material in the same direction as the cutting edge is exiting from the material (which is the same direction as the chips are thrown). Feeding the tool in the wrong direction causes the cutting edge of the bit to climb out of the work and pull the tool in the direction of this feed.
5. When using rotary files, cut-off wheels, high-speed cutters or tungsten carbide cutters, always have the work securely clamped. These wheels will grab if they become slightly canted in the groove, and can kickback. When a cut-off wheel grabs, the wheel itself usually breaks. When a rotary file, high-speed cutter or tungsten carbide cutter grabs, it may jump from the groove and you could lose control of the tool.

Safety warnings specific for grinding and abrasive cutting-off operations:
1. Use only wheel types that are recommended for your power tool and only for recommended applications. For example: do not grind with the side of a cut-off wheel. Abrasive cut-off wheels are intended for peripheral grinding, side forces applied to these wheels may cause them to shatter.
2. For threaded abrasive cones and plugs use only undamaged wheel mandrels with an unrelieved shoulder flange that are of correct size and length. Proper mandrels will reduce the possibility of breakage.
3. Do not "jam" a cut-off wheel or apply excessive pressure. Do not attempt to make an excessive depth of cut. Overstressing the wheel increases the loading and susceptibility to twisting or snagging of the wheel in the cut and the possibility of kickback or wheel breakage.
4. Do not position your hand in line with and behind the rotating wheel. When the wheel, at the point of operation, is moving away from your hand, the possible kickback may propel the spinning wheel and the power tool directly at you.
5. When wheel is pinched, snagged or when interrupting a cut for any reason, switch off the power tool and hold the power tool motionless until the wheel comes to a complete stop. Never attempt to remove the cut-off wheel from the cut while the wheel is in motion otherwise kickback may occur. Investigate and take corrective action to eliminate the cause of wheel pinching or snagging.
6. Do not restart the cutting operation in the workpiece. Let the wheel reach full speed and carefully re-enter the cut. The wheel may bind, walk up or kickback if the power tool is restarted in the workpiece.
7. Support panels or any oversized workpiece to minimize the risk of wheel pinching and kickback. Large workpieces tend to sag under their own weight. Supports must be placed under the workpiece near the line of cut and near the edge of the workpiece on both sides of the wheel.
8. Use extra caution when making a "pocket cut" into existing walls or other blind areas. The protruding wheel may cut gas or water pipes, electrical wiring or objects that can cause kickback.
Safety warnings specific for wire brushing operations:
1. Be aware that wire bristles are thrown by the brush even during ordinary operation. Do not overstress the wires by applying excessive load to the brush. The wire bristles can easily penetrate light clothing and/or skin.
2. Allow brushes to run at operating speed for at least one minute before using them. During this time no one is to stand in front or in line with the brush. Loose bristles or wires will be discharged during the run-in time.
3. Direct the discharge of the spinning wire brush away from you. Small particles and tiny wire fragments may be discharged at high velocity during the use of these brushes and may become imbedded in your skin.

Additional Safety Warnings

Risk of injury to user. The power cord must only be serviced by a Dremel Service Facility.
This product is not intended for use as a dental drill, in human or veterinary medical applications. Serious injury may result.

To reduce the risk of injury, always wear safety goggles or glasses with side shields. The operator and other people in the work area must wear eye protection in accordance with ANSI Z87.1. Eye protection does not fit all operators in the same way. Make sure the eye protection chosen has side shields or provides protection from flying debris both from the front and sides. The em ployer is responsible for enforcing the use of eye protection by the opera tor and other people in the work area. When required, wear head pro tection in accordance with ANSI Z89.1

Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

Lead from lead-based paints,
Crystalline silica from bricks and cement and other masonry products, and
Arsenic and chromium from chemicallytreated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

Intended Use

This hand-held, corded rotary tool is intended for carving/engraving, routing, grinding/sharpening, cutting, cleaning/polishing, sanding, grout removal and drilling applications in soft wood, hard wood, laminates/ plastics, steel, aluminum/brass/copper, shell/stone, ceramic, glass, and other materials.
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Specifications

Model Number	3100
Voltage rating	120V 60Hz
Amperage rating	1.2A
Rated speed	n 5,000-35,000/min
Collet capacities	1/32", 1/16", 3/32", 1/8"

NOTE: For tool specifications refer to the nameplate on your tool.

Symbols

Some of the following symbols may be used on your tool. Please study them and learn their meaning. Proper interpretation of these symbols will allow you to operate the tool better and safer.

Symbol	Designation/Explanation
V	Volts (voltage)
A	Amperes (current)
Hz	Hertz (frequency, cycles per second)
⌀	Diameter (size of drill bits, grinding wheels, etc.)
n	Rated speed (Maximum attainable speed)
.../min	Revolutions or reciprocation per minute (revolutions, strokes, surface speed, orbits etc. per minute)
0	Off position (zero speed, zero torque...)
1, 2, 3, ... I, II, III,	Selector settings (speed, torque or position settings. Higher number means greater speed)
	Arrow (action in the direction of arrow)
	Alternating current (Type or a characteristic of current)
	Designates Double Insulated Construction tools
	This symbol designates that this tool is listed by the Canadian Standards Association, to United States and Canadian Standards.