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How To change the Blade on a Ryobi ONE+ Mitre saw

10/06/2026, 19:43

How to Change a Blade on a Mitre Saw 
 

Safety First 

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

Step-by-Step Instructions 

  1. Loosen the blade bolt cover screw 
    • Loosen (but do not remove) the screw on the blade bolt cover so you can access the blade bolt. 
      Circ saw steps 1 
       
  2. Move the lower blade guard out of the way 
    • Swing the guard upward and hold it clear of the blade area. 
    • Keep fingers away from the blade at all times. 
       
  3. Engage the spindle lock 
    • Press and hold the spindle lock button to stop the spindle from turning. 
       
  4. Loosen the blade bolt 
    • Use the Allen key supplied with the saw to turn the blade bolt clockwise while holding the spindle lock. 
    • Remove the outer flange. 
      Circ saw steps 4 
       
  5. Remove the old blade 
    • Carefully slide the blade off the spindle. 
    • Note: The inner flange must remain on the spindle. 
       
  6. Fit the new blade 
    • Ensure the rotation direction on the blade matches the arrow on the blade guard
    • Place the blade onto the spindle against the inner flange. 
      Circ saw steps 6 
       
  7. Replace the outer flange and tighten the bolt 
    • Position the outer flange with its flat side facing the blade. 
    • Tighten the blade bolt anti-clockwise using the Allen key while holding the spindle lock. 
      Circ saw steps 7 
       
  8. Lower the blade guard and secure the cover 
    • Ensure the guard moves freely and automatically covers the blade. 
    • Tighten the blade bolt cover screw. 
       

Final Checks 

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

 

Applicable Models

RMS254DB, RMS254DB-K, RMS305DB, R18MS254X