Cutting a carbon seatpost - dos and don'ts?

[PygaSchmyga]

I need to shorten a carbon seatpost to accommodate a shorter rider - what are the best tools to use for this?  Can I use a haksaw?  Any advice welcome!

[100Tours]

I usually use masking tape over the area I want to cut. a fine blade hacksaw should work fine. Use a mask. Don't inhale!

 

[DieselnDust]

11 hours ago, PygaSchmyga said:

I need to shorten a carbon seatpost to accommodate a shorter rider - what are the best tools to use for this?  Can I use a haksaw?  Any advice welcome!

32tpi hacksaw blade minimum or use a dremel with a diamond coated cutting disc at high speed. Wrapped insulation or masking tape over the area and cut on and through the tape. I prefer the dremel as it cuts cleaner and seals the cut. 
if going the hacksaw route make sure the blade is mounted with teeth facing forward and account for the stagger of the teeth when measuring your cut.

as stated, wear a breather or face mask, protect your eyes, ears from carbon dust and a hat also helps to stop carbon dust running into your eyes later.

Edited May 26 by DieselnDust

[thebob]

Spray the post with a bit of water before you start cutting and a couple times during cutting. This collects the carbon dust and stops it floating about

[mikkelz]

Hacksaw, masking tape, ruler (measure twice), send it. 🪚

[Andreas_187]

Normal hacksaw is fine, takes about 20 seconds 

[dave303e]

You can bant it away from what I hear...

Personally found a Sawzall was a win for this job