Ryobi CSB121, Operator'S Manual

Page 1: ...rformance 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 OPERATOR S MANUAL 7 1 4 in 184 mm CIRCULAR SAW Model CSB121 DOUB...

Page 2: ... side shields and a full face shield when needed We recommend Wide Vision Safety Mask for use over eyeglasses or standard safety glasses with side shields Always wear eye protection which is marked to comply with ANSI Z87 1 WARNING Do not attempt to operate this tool until you have read thoroughly and understand completely all instructions safety rules etc contained in this manual Failure to compl...

Page 3: ...tool Do not use tool while tired or under the influence of drugs alcohol or medication A moment of inat tention while operating power tools may result in serious personal injury Dress properly Do not wear loose clothing or jewelry Contain long hair Keep your hair cloth ing and gloves away from moving parts Loose clothes jewelry or long hair can be caught in mov ing parts Avoid accidental starting ...

Page 4: ...r guard may operate sluggishly due to damaged parts gummy deposits or a buildup of debris Lower guard should be retracted manually only for special cuts such as Pocket Cuts and Compound Cuts Raise lower guard by retracting handle As soon as blade enters the material lower guard must be released For all other sawing the lower guard should operate automatically Always observe that the lower guard is...

Page 5: ...se of blade binding When restarting a saw in the workpiece center the saw blade in the kerf and check that saw teeth are not engaged into the material If saw blade is binding it may walk up or KICKBACK from the workpiece as the saw is restarted Support large panels to minimize the risk of blade pinching and KICKBACK Large panels tend to sag under their own weight Supports must be placed under the ...

Page 6: ... elec tric shock or fire Make sure your extension cord is in good condi tion When using an extension cord be sure to use one heavy enough to carry the current your product will draw A wire gage size A W G of at least 14 is recommended for an extension cord 50 feet or less in length A cord exceeding 100 feet is not recommended If in doubt use the next heavier gage The smaller the gage number the he...

Page 7: ...deserve your careful attention and understanding The safety warnings do not by themselves eliminate any danger The instructions or warnings they give are not substitutes for proper accident prevention measures DANGER Failure to obey a safety warning will result in serious injury to yourself or to others Always follow the safety precautions to reduce the risk of fire electric shock and personal inj...

Page 8: ... are damaged or missing please contact Ryobi Customer Service Refer to the back page of this manual for contact information Blade Diameter 7 1 4 in 184 mm Blade Arbor 5 8 in 16 mm Cutting Depth at 0 2 3 8 in 60 mm Cutting Depth at 45 1 13 16 in 46 mm Cutting Depth at 51 5 1 5 8 in 41 mm Rating 120 volts 60 Hz AC Input 12 amperes No Load Speed 4600 RPM Net Weight 11 lbs 5 kg PACKING LIST Circular S...

Page 9: ... use only identical Ryobi replacement parts ELECTRIC MOTOR Your circular saw has a precision built electric motor It should be connected to a power supply that is 120 volts 60 Hz only Do not operate this tool on direct current DC A substantial voltage drop will cause a loss of power and the motor will overheat If your saw does not operate when plugged into an outlet double check the power supply F...

Page 10: ...uch alteration or modification is misuse and could result in a hazardous condition leading to possible serious personal injury DEPTH ADJUSTMENT WING NUT LOWER BLADE GUARD HANDLE BEVEL CUT ADJUSTMENT WING NUT MOTOR HOUSING HANDLE SPINDLE LOCK BUTTON SWITCH UPPER BLADE GUARD BASE LOWER BLADE GUARD BLADE WRENCH STORAGE AREA WRENCH ...

Page 11: ...dle or spindle lock always allow motor to come to a complete stop before engaging spindle lock Depress spindle lock button Remove blade screw by turning it counterclockwise with the wrench Remove spring washer and outer washer D washer Wipe a drop of oil onto inner washer and outer washer D washer where they contact blade WARNING If inner washer has been removed replace it before placing blade on ...

Page 12: ...t water or kerosene to removetheseaccumulations DONOTUSEGASOLINE BLADE GUARD SYSTEM See Figure 5 The lower blade guard attached to your circular saw is there for your protection and safety Do not alter it for any reason If it becomes damaged do not operate the saw until you have the guard repaired or replaced Always leave guard in operating position when using the saw DANGER When sawing through wo...

Page 13: ... safety practices Keep the blade at the correct depth setting The depth setting should not exceed 1 4 in 6 35 mm below the material being cut Inspect the workpiece for knots or nails before cut ting Never saw into a knot or nail Make straight cuts Always use a straight edge guide when rip cutting This helps prevent twisting the blade Use clean sharp and properly set blades Never make cuts with dul...

Page 14: ...de depth setting The correct blade depth setting for all cuts should not exceed 1 4 in 6 35 mm below the material being cut More blade depth will increase the chance of kickback and cause the cut to be rough For more depth of cut accuracy a scale is located on the upper blade guard Follow these directions to adjust the blade depth UNPLUG YOUR CIRCULAR SAW WARNING Failure to unplug the tool could r...

Page 15: ...on the workpiece while making a cut Support the workpiece with a clamp near the cut Clamp the workpiece securely so that the workpiece will not move during the cut Support the workpiece so that the cut is always on your right Avoid placing the saw on the part of the workpiece that will fall off when the cut is made Place the workpiece with the good side down Draw a guideline along the desired line...

Page 16: ...nce from the line of cut to the guideline is the amount you should offset the guideline TO RIP CUT See Figure 16 Use a guide when making long or wide rip cuts with your saw NOTE You may also use a rip guide to make rip cuts Refer to OPTIONAL RIP GUIDE later in this manual Follow these directions to rip cut Secure the workpiece Clamp a straight edge to the workpiece using C clamps Saw along the str...

Page 17: ...SAW WARNING Failure to unplug the tool could result in accidental starting causing serious injury Loosen wing nut Raise motor housing end of saw until you reach desired angle setting on bevel scale Tighten wing nut securely WARNING Attempting a bevel cut without having the wing nut securely tightened can result in serious injury TO BEVEL CUT See Figure 18 Follow these directions to bevel cut Hold ...

Page 18: ...s to adjust the positive 0 bevel stop UNPLUG YOUR CIRCULAR SAW WARNING Failure to unplug the tool could result in accidental starting causing serious injury Loosen wing nut Loosen hex nut securing adjusting screw Turn screw and adjust base until square with saw blade Tighten hex nut and wing nut securely WARNING Attempting a bevel cut without having the wing nut securely tightened can result in se...

Page 19: ... the handle Rest the front of the base flat against the workpiece with the rear of the handle raised so the blade does not touch the workpiece Start the saw and let the blade reach full speed Guide the saw into the workpiece and make the cut WARNING Always cut in a forward direction when pocket cutting Cutting in the reverse direction could cause the saw to climb up on the workpiece and back towar...

Page 20: ...ight for your cut to be straight Use caution to prevent the blade from binding in the cut OPTIONAL DUST NOZZLE KIT 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 NOTE If you use the nozzle you should always connect it to...

Page 21: ...it has been found that they are subject to accelerated wear and possible premature failure as the fiberglass chips and grindings are highly abrasive to bearings brushes commutators etc Consequently it is not recommended that this tool be used for extended work on any fiberglass material wallboard spackling compounds or plaster If however you do work with any of these materials it is extremely impo...

Page 22: ...LLOWING INFORMATION MODEL NUMBER SERIAL NUMBER CSB121 EXTENSION CORD CAUTION When using a power tool at a considerable distance from a power source be sure to use an extension cord that has the capacity to handle the current the tool will draw An under sized cord will cause a drop in line voltage resulting in over heating and loss of power Use the chart to determine the mini mum wire size required...