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Old Nov 18, 2012, 09:23 PM
¿Por Qué No?
Joined Aug 2011
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Drilling carbon props

I have a couple of PT props and need to enlarge center hole from 6mm to 8mm. I’ve never drilled in carbon before and better safe than sorry. I have an 8mm drill and always use a backing board for drill through most materials. What have you done?
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Old Nov 19, 2012, 12:57 AM
Caution:Makes sharp left turns
Troy's Avatar
United States, CA, Lake Forest
Joined Feb 1999
6,015 Posts
Don't drill it, step ream it:
http://www3.towerhobbies.com/cgi-bin...P?I=LXG941&P=8
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Old Nov 19, 2012, 10:25 AM
Dean
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USA, CO, Littleton
Joined Apr 2005
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+1 ^
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Old Nov 23, 2012, 12:19 AM
Composites guy
North OC, Ca.
Joined Jun 2005
1,187 Posts
What they said AND put masking tape on both sides.
Use abrasive(diamond if available) bits and coolant(water is okay) if doing significant work.
Also keeps dust down.
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