Related Manuals for LittleMachineShop.com HiTorque 7500
Summary of Contents for LittleMachineShop.com HiTorque 7500
- Page 1 The premier source of tooling, parts, and accessories for bench top machinists. HiTorque 8½×20 Bench Lathe User’s Guide Model 7500 • Model 7550 Deluxe from LittleMachineShop.com...
- Page 2 © Copyright 2022 LittleMachineShop.com. All rights reserved. Written by Chris Wood of LittleMachineShop.com Revision 3, October 2022 LittleMachineShop.com https://www.littlemachineshop.com 396 W. Washington Blvd. #500, Pasadena, CA 91103 info@littlemachineshop.com• (800) 981-9663...
-
Page 3: Table Of Contents
Contents Manual Turning ....... 27 Turning with Power Feed ....27 Introduction ........4 Facing ..........28 Specifications........4 Facing with Power Feed ....28 Safety Considerations ......5 Turning Angles ........29 General Safety ......... 5 Threading ........29 Lathe Safety ........ -
Page 4: Introduction
Introduction This user’s guide covers care and operation of the LittleMachineShop.com HiTorque 8½×20 Bench Lathe. Be sure to read and understand the safety guidelines presented in this book before using your lathe. The HiTorque 8½×20 Bench Lathe is available in two models: •... -
Page 5: Safety Considerations
Safety Considerations Always use common sense when using a power tool. Besides the general safety rules for any power tool, following also are specific considerations for the bench lathe. General Safety • Use common sense. Think through the results of your actions before you act. •... -
Page 6: Machine Safety
Machine Safety • Keep bystanders, children, and visitors a safe distance away while operating any power tool. • Read the manual. Know the operation of every control before you attempt any operation of the machine. • Make sure that all guards are in place and functioning before operating the machine. •... -
Page 7: Features
Features Front View 5 6 7 1. Motor controls (for details, see “Motor 8. Tailstock (for details, see “Tailstock Controls” on page 9) Controls” on page 13) 2. Headstock 9. Change gear cover 3. Chuck 10. Bed ways 4. Carriage 11. -
Page 8: Accessories
Accessories The following accessories come with the HiTorque Bench Lathe. • • #2 Morse taper dead center Chuck key for the 3-jaw chuck • • #3 Morse taper dead center Open end wrenches: 8 x 10 mm, 14 x 17 mm, and 17 x 19 mm •... -
Page 9: Lathe Controls
Mount the lathe to the workbench with M8 (or 5/16") bolts. Use fender washers on the underside of wooden benches to prevent the bolt heads from pulling through. You might need to unbolt the motor to install the two bolts on the back of the headstock. If you have the chip tray, its mounting dimensions are shown below. -
Page 10: Carriage And Cross Feed Controls
Power Switch and Emergency Stop (E-stop) Switch The green power switch enables input power to the speed control circuit board. The red E-stop switch disconnects the power. Turn the power off when you are not using the lathe. Start/Stop Button The Start/Stop button illuminates and starts the spindle when pressed while the power is on. - Page 11 1. Carriage hand wheel 4. Carriage lock screw 2. Cross slide feed handle 5. Half nut lever 3. Compound rest feed handle 6. Power feed lever Carriage Hand Wheel The carriage hand wheel moves the carriage toward or away from the headstock, depending on which way it is turned.
- Page 12 To replace the battery: Each DRO uses a single CR2032 lithium battery (LittleMachineShop.com part number 4292). 1. On the bottom of the display unit, squeeze together the two tabs and then pull out the battery drawer.
-
Page 13: Tailstock Controls
3. Tighten the two socket head cap screws. Chris’ Tip: For accurate work, use a protractor between the compound rest and the cross slide. Don’t depend on the markings on the side of the compound rest. Half Nut Lever The half nut lever locks the half nuts around the lead screw, which engages the carriage drive for threading. -
Page 14: Bluetooth Dro (Model 7550 Only)
Tailstock Quill Locking Lever The tailstock quill locking lever keeps the tailstock quill from moving. Use the tailstock quill locking lever to lock the tailstock quill in position when you are turning between centers. Turn the lever clockwise to lock the tailstock quill, and counterclockwise to unlock the tailstock quill. Bluetooth DRO (Model 7550 only) The Android tablet included with your DRO has the SIEG DRO app preinstalled. -
Page 15: Using The App
• Under W Axis • Enable W Axis: remove check 5. Tap the Back button at the bottom of the screen when you have made the settings. Using the app Your DRO should now be working. Turn a hand wheel and watch the numbers change. By convention, the axis parallel to the spindle (that is, the axis on which the carriage moves) is the Z axis, and the cross slide moves along the X axis. -
Page 16: Absolute Versus Incremental Coordinates
Tap the Position value to enter the current position value. Tap to set the incremental value to zero. Hold to set both the absolute value and the incremental value to zero. Turns on an audible warning that you are approaching a defined point. Absolute versus incremental coordinates The DRO keeps track of two coordinate systems: absolute and incremental. -
Page 17: Tools
To preview a workspace • Once you have a collection of points, you can get an idea if they are correct by previewing the workspace. Tap the vertical ellipsis menu to the right of the workspace name. Choose Preview Workspace to see the relationship of the points. Tools The DRO can keep track of your tool dimensions. -
Page 18: Cross Slide Gib
Carriage retainer To adjust the carriage gibs: 1. Loosen the three socket head cap screws on the back bottom of the carriage. 2. Loosen the four lock nuts on the back bottom of the carriage. 3. Slightly loosen all four set screws. 4. -
Page 19: Cross Slide Nut
To adjust the cross slide gib: 1. Loosen the three lock nuts on the side of the cross slide. 2. Slightly loosen all three set screws on the side of the cross slide. 3. Snug each set screw equally. This will lock the cross slide in position. 4. -
Page 20: Tailstock Position
Apron bolts To adjust the apron position: 1. Loosen the four socket head cap screws that secure the apron to the carriage. There are two on the left side of the carriage and two on the right side of the carriage 2. -
Page 21: Half Nuts
To adjust the tailstock position: 1. Remove the 3-jaw chuck from the lathe spindle. 2. Put a 3 Morse taper dead center in the spindle. 3. Remove the tailstock from the lathe. 4. Loosen the two small locking set screws. 5. -
Page 22: Maintenance
Where oil is required, we recommend Mobil Vactra Oil No. 2, an oil especially designed for machine tool way lubrication and bearing lubrication. Chris’ Tip: Mobil Vactra Oil No. 2 is available from LittleMachineShop.com (part number 4120). If you prefer to purchase locally, get Mobil 1 synthetic motor oil, any viscosity, available at most auto parts stores. -
Page 23: Chuck
Location Lubricant Frequency Notes Cross slide Daily Advance the cross slide to the extent of its travel. dovetail Apply oil to the end of the gib and the ends of the dovetails. Retract the cross slide. Oil fittings Weekly There are several oil fittings on the lathe. Lubricate each one with one squirt from a pump oiler. -
Page 24: Mounting Work In A 3-Jaw Chuck
Because of the construction of a 3-jaw chuck, each of the three jaws in a set is different. You will find a number in the groove in the side of each jaw that identifies its position in the set. To remove a set of chuck jaws: 1. -
Page 25: Grinding Tool Bits
Side cutting edge The side cutting edge does most of the cutting. As the tool bit moves along the work piece the side cutting edge removes most of the material. Front cutting edge The front cutting edge cuts when the tool is advanced into the work. Nose The nose is a critical part of the cutting edge, because it produces the surface finish of the work piece. -
Page 26: Adjusting Tool Bit Height
Grind the Front Relief The first step in creating a tool bit is to grind the front relief. For most work, a relief angle of 10° works well. While you are grinding the front relief, you are also creating the front cutting edge angle. Make this angle about 10°... -
Page 27: Turning
3. Move the carriage so that the tool bit is near the right end of the work piece. 4. Turn the lathe on. Adjust the speed to an appropriate speed for the material and diameter you are working on. The LittleMachineShop.com Web site has a calculator to help you determine appropriate cutting speeds at https://littlemachineshop.com/speeds... -
Page 28: Facing
3. Move the carriage so that the tool bit is near the right end of the work piece. 4. Turn the lathe on. Adjust the speed to an appropriate speed for the material and diameter you are working on. The LittleMachineShop.com Web site has a calculator to help you determine appropriate cutting speeds at https://littlemachineshop.com/speeds... -
Page 29: Turning Angles
3. Move the carriage to the right so that the tool bit is past the right end of the work piece. 4. Turn the lathe on. Adjust the speed to an appropriate speed for the material and diameter you are working on. The LittleMachineShop.com Web site has a calculator to help you determine appropriate cutting speeds at https://littlemachineshop.com/speeds... -
Page 30: Change Gears
Change Gears The series of gears that drive the lead screw are called change gears because you change them to turn different thread pitches. There are 4 positions for the change gears, commonly called A, B, C, and D. A This is the top change gear position. It is forward of and slightly below the spindle. B Gear positions B and C are on the same shaft, between positions A and D. - Page 31 • To change a gear in positions B or C, use an 8 mm end wrench on the square end of the shaft to keep it from turning. Loosen the nut with a 19 mm end wrench and remove the notched washer from behind the nut.
-
Page 32: Change Gear Tables
Change Gear Tables Inch Threads – Right Hand Inch Threads – Left Hand 11.5 11.5... -
Page 33: Making Left Hand Threads
Metric Threads – Right Hand Metric Threads – Left Hand Pitch Pitch 0.25 0.25 0.35 0.35 0.45 0.45 0.75 0.75 1.25 1.25 1.75 1.75 Making Left Hand Threads You can make left hand threads with this lathe by changing one gear. Move the driver gear from the idler shaft to the drive shaft and also swap the spacer. -
Page 34: Compound Angle
used. The left side should have about 8° of relief, and the right side should have about 10° of relief. The tip of the tool should have a flat that is 1/8 of the thread pitch. Compound Angle Set the compound rest at a 29.5° angle from a line perpendicular to the axis of the lathe. This allows you to advance the tool with the compound rest. -
Page 35: Threading Process
Use a nut or the matching part to tell when you are done cutting the thread. Common Accessories You will soon find that the purchase of a lathe is just an initial step. There are many tools and accessories that you will need to get full use from your lathe. LittleMachineShop.com carries a full... -
Page 36: Quick Change Tool Post
Following are some common accessories used with the bench lathe, a small sampling of the complete LittleMachineShop.com line. Quick Change Tool Post The standard bench lathe tool post has positions for up to four tools. While this is useful, the standard bench lathe tool post does not have the capability to hold boring bars or cut-off tools without an adapter of some sort. -
Page 37: 4-Jaw Chuck
This set includes a chuck key and reversible jaws. The through bore of this chuck is 0.98". The chuck can hold work up to 100 mm (3.94") in diameter. LittleMachineShop.com part number 2338 & 2961. 5 inch, 4-jaw chuck. Each jaw is independently adjustable and reversible. -
Page 38: Live And Dead Centers
LittleMachineShop.com part number 3400. Faceplate for the HiTorque Bench Lathe. The faceplate is 7.1" in diameter and has 8 slots for mounting work. LittleMachineShop.com part number 3401. Clamping kit for faceplate. This kit includes clamping bars and fasteners to attach work to the faceplate. - Page 39 The steady rest is LittleMachineShop.com part number 3398. The steady rest can support work up to 2.2" in diameter. The follower rest is LittleMachineShop.com part number 3399.
-
Page 40: Parts Diagram: 7500
Parts Diagram: 7500 Model 7500 drawing 1... - Page 41 Model 7500 drawing 2...
-
Page 42: Parts Diagram: 7550
Parts Diagram: 7550 Model 7550 drawing 1... - Page 43 Model 7550 drawing 2...
-
Page 44: Parts List
Parts List Refer to the parts diagrams on the preceding pages and find the number of the part you need (Dwg PN). The LMS PN column shows the LittleMachineShop.com part number—the number you use to order on our website. Description... - Page 45 Description Description Description 173 Oil seal 4362 223 Set screw, M4×8 5807 272 Positioning ring 5811 174 Gear, 32T 4367 224 Linoleum 4383 273 Shaft sleeve 5307 175 Adjusting block 5268 225 Protection cover 4384 274 Gear, 39T 5308 176 Retaining ring, M30 5805 226 Linoleum 4385...
- Page 46 Description Description 325 Nut, M8 5182 435 Scale, 1 m 5498 326 Handle 1347 436 Screw, M4×10 1529 327 Screw, M8×55 1565 437 Bracket 6145 328 Handwheel (7500) 4414 438 Washer 5799 328 Handwheel (7550) 4165 439 Screw, M3×14 5823 329 Inner gear, 30T 5301 442 Bracket back...
-
Page 47: Wiring Diagram
Wiring Diagram...