Replies

1. 
   calvin | Aug 02, 2023 06:58pm | #1

   Simple answer, what size blade and/or what kind of saw?

   Other question, why the question?

2. 
   charles3 | Aug 02, 2023 09:38pm | #2

   Talking standard 7-1/4" circular saw. Reason is just curiosity.

1. 
   calvin | Aug 02, 2023 10:36pm | #3

   What size abrasive blade in it?
   You can’t cut a 4x4 with a 7-1/4” in one pass.
   So, to cut 3” of cement board……..?

1. 
   charles3 | Aug 03, 2023 01:45pm | #4

   I'm talking lap siding or soffit thickness, not 5/4 trim.

1. 
   calvin | Aug 03, 2023 02:06pm | #5

   Sorry for my not knowing what you were cutting.
   Add up the thickness of whatever you are cutting and what do you get?
   Turn your saw over and measure from the base to the tip of the blade.
   What do you get?

   Thanks.

3. 
   charles3 | Aug 03, 2023 08:18pm | #6

   Fiber cement is typically 5/16" thick, so 3 sheets is almost an inch and 6 sheets is almost 2". Any circular saw should be able to cut that deep. But my saw goes a foot or so and then starts to wander and bind instead.

1. 
   calvin | Aug 03, 2023 08:32pm | #7

   Blade problem or lack of saw power.
   Too much friction.

   Do you clamp the material together? The slightest movement of material could cause it to bind.

1. 
   charles3 | Aug 03, 2023 08:55pm | #8

   Yes, always clamped. Tried 2 different blades with the same result.

4. 
   calvin | Aug 03, 2023 10:03pm | #9

   I’d guess then that it narrows it down to the saw itself.
   This from an old carpenter that has never ganged up fibercement.
   Maybe someone will come with the answer.
   Best of luck.

5. 
   1095mike | Aug 04, 2023 11:45am | #10

   If the blade gets very hot it can warp and start to wander