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How to Fit A blade onto A Ryobi Left-side Circular Saw

10/06/2026, 13:46

How to Fit a Blade on a Left-Hand Circular Saw 
 

Safety First 

  • Disconnect the battery/disconnect power cord before making any adjustments. 
  • Wear eye protection and gloves to avoid injury. 

Circ saw infographic

 

  1. Engage the spindle lock 
    • Press and hold the spindle lock button (or use the locking mechanism provided) to stop the spindle from turning. 
       
  2. Loosen the blade bolt 
    • Use the Allen key supplied with the saw to turn the bolt clockwise to loosen it. 
      Circ saw steps
       
  3. Move the lower blade guard out of the way 
    • Lift or retract the guard using the retracting handle so you can access the spindle and fit the blade. 
    • Keep fingers clear of the blade area at all times. 
       
  4. Remove the outer flange and old blade 
    • Take off the outer flange and carefully remove the blade from the spindle. 
       
  5. Fit the new blade 
    • Follow the direction-of-cut arrow on the blade housing to ensure the blade teeth point the correct way (towards the front of the saw). 
    • Make sure the arbour on the NEW blade is the same size as the spindle (16mm) 
    • Place the blade onto the inner flange. CARE: The inner flange must be in-place before the blade. 
       
  6. Replace the outer flange and tighten the bolt 
    • Put the outer flange back in position. 
    • Tighten the bolt anti - clockwise using the Allen key while holding the spindle lock. 
      Circ saw steps
       
  7. Release the blade guard 
    • Ensure the guard moves freely and automatically covers the blade.
       

Final Checks 

  • Confirm the blade is secure and spins freely without wobble. 
  • Reconnect the power only when you are ready to cut.

 

 

Applicable Models

R18CS-0, RCS18C, R18CSP0