Ryobi CSB121 Operator's Manual
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Ryobi CSB121 Operator's Manual

7-1/4 in.(184 mm) circular saw
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THANK YOU FOR BUYING A RYOBI CIRCULAR SAW.
Your new circular saw has been engineered and manufactured to Ryobi's high standard for dependability, ease of
operation, and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.
CAUTION: Carefully read through this entire operator's manual before using your new circular saw.
Pay close attention to the Rules for Safe Operation, Warnings, and Cautions. If you use your circular saw properly
and only for what it is intended, you will enjoy years of safe, reliable service.
Thank you again for buying Ryobi tools.
SAVE THIS MANUAL FOR FUTURE REFERENCE
OPERATOR'S MANUAL
7-1/4 in. (184 mm) CIRCULAR SAW
Model CSB121
DOUBLE INSULATED

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Summary of Contents for Ryobi CSB121

  • Page 1 THANK YOU FOR BUYING A RYOBI CIRCULAR SAW. Your new circular saw has been engineered and manufactured to Ryobi's high standard for dependability, ease of operation, and operator safety. Properly cared for, it will give you years of rugged, trouble-free performance.

  • Page 2: Table Of Contents

    Safety, performance, and dependability have been given top priority in the design of this circular saw making it easy to maintain and operate. The operation of any power tool can result in foreign objects being thrown into your WEAR YOUR eyes, which can result in severe eye damage.

  • Page 3: Work Area

    GENERAL SAFETY RULES WARNING: Read and understand all instructions. Failure to follow all instructions listed below, may result in electric shock, fire and/or serious personal injury. SAVE THESE INSTRUCTIONS WORK AREA Keep your work area clean and well lit. Cluttered benches and dark areas invite accidents.

  • Page 4: General Safety Rules

    Keep your second hand on the auxiliary handle or motor housing. If both hands are holding the saw, they cannot be cut by the blade. Keep your body positioned to either side of the saw blade, but not in line with the saw blade.

  • Page 5: Specific Safety Rules

    Maintain a firm grip with both hands on the saw and position your body and arm to allow you to resist KICKBACK forces. KICKBACK forces can be controlled by the operator, if proper precautions are taken.

  • Page 6: Additional Safety Rules

    ADDITIONAL SAFETY RULES Hold tool by insulated gripping surfaces when performing an operation where the cutting tool may con- tact hidden wiring or its cord. Contact with a “live” wire will make exposed metal parts of the tool “live” and shock the operator.

  • Page 7: Symbols

    Important: 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 NAME Volts Amperes Hertz Watt Minutes Alternating Current No Load Speed...

  • Page 8: Specifications

    Do not discard the packing material until you have carefully inspected and satisfactorily operated the tool. If any parts are damaged or missing, please contact Ryobi Customer Service. Refer to the back page of this manual for contact information. SPECIFICATIONS UNPACKING...

  • Page 9: Features

    DOUBLE INSULATION Your Ryobi power tool is double insulated. This means you are separated from the tool's electrical system by two complete sets of electrical insulation. This extra layer of insulation is intended to protect the user from electrical shock due to a break in the wiring insulation. All exposed metal parts are isolated from the internal metal motor components with protecting insulation.

  • Page 10: Features

    ADJUSTMENT WRENCH STORAGE AREA WRENCH SPINDLE LOCK BUTTON LOWER BLADE GUARD HANDLE WARNING: Do not attempt to modify this tool or create accessories not recommended for use with this tool. Any such alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury.

  • Page 11: Assembly

    WARNING: 7-1/4 in. (184 mm) blade is the maximum blade capacity of your saw. Also, never use a blade that is too thick to allow outer blade washer to engage with the flat on the spindle. Larger blades will come in...

  • Page 12: Assembly

    Remove spring washer and outer blade washer ("D" washer). SAW BLADES The best of saw blades will not cut efficiently if they are not kept clean, sharp, and properly set. Using a dull blade will place a heavy load on your saw and increase the danger of kickback.
  • Page 13 KICKBACK See Figure 6, 7, 8, and 9. Kickback occurs when the blade stalls rapidly and the saw is driven back towards you. Blade stalling is caused by any action which pinches the blade in the wood. DANGER: Release switch immediately if blade binds or saw stalls.

  • Page 14: Adjusting Blade Depth

    STARTING/STOPPING THE SAW See Figure 10. To start the saw : Depress the switch trigger. Always let the blade reach full speed, then guide the saw into the workpiece. WARNING: The blade coming in contact with the workpiece before it reaches full speed could cause your saw to “kickback”...

  • Page 15: Operating The Saw

    OPERATING THE SAW See Figures 12, 13, and 14. It is important to understand the correct method for operating your saw. Refer to the figures in this section to learn the correct and incorrect ways for handling your saw. WARNING: To make sawing easier and safer, always maintain proper control of the saw.
  • Page 16 Follow these directions to rip cut. Secure the workpiece. Clamp a straight edge to the workpiece using C-clamps. Saw along the straight edge to achieve a straight rip cut. NOTE: Do not bind the blade in the cut. OPERATION TOP VIEW OF SAW...

  • Page 17: Bevel Cutting

    Hold the saw firmly with both hands as shown. Rest the front edge of the base on the workpiece. Start the saw and let the blade reach full speed. Guide the saw into the workpiece and make the cut. Release the trigger and allow the blade to come to a complete stop.

  • Page 18: Bevel Stop

    See Figure 20. Your saw is equipped with a length of cut scale on its base. It is parallel with the saw blade and you can use it to measure the distance into the material the blade cuts. NOTE: Six inches is the maximum length of cut that you can measure.

  • Page 19: Pocket Cutting

    WARNING: Always adjust bevel setting to zero before making a pocket cut. Attempting a pocket cut at any other setting can result in loss of control of your saw possibly causing serious injury. Follow these directions to pocket cut. Adjust the bevel setting to zero.

  • Page 20: Accessories

    See Figure 23. You may purchase a dust nozzle kit, part no. 982829- 001, for use with your saw. As shown in the figure, the adapter fits over the dust chute which is located on the upper blade guard.The nozzle attaches to the adapter.

  • Page 21: Maintenance

    WARNING: When servicing use only identical Ryobi replacement parts. Use of any other parts may create a hazard or cause product damage. GENERAL Avoid using solvents when cleaning plastic parts. Most plastics are susceptible to damage from various types of commercial solvents and may be damaged by their use.

  • Page 22: Extension Cord Caution

    Ryobi Authorized Service Center. Be sure to provide all pertinent facts when you call or visit. Please call 1-800-525-2579 for your nearest Ryobi Authorized Service Center. You can also check our Web site at www.ryobitools.com for a complete list of Authorized Service Centers.

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