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How to change the Blade on a Ryobi Dual Blade sliding 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 1a 
       
  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 4b 
       
  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 6c 
       
  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 7d 
       
  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