View Single Post
Old 11-12-2010, 07:46 AM
happycheapskate's Avatar
happycheapskate happycheapskate is offline
Motorized Bicycle Elite Member
Join Date: Nov 2009
Location: Rockwall TX
Posts: 1,992
Thumbs up Re: gear won't fit around coaster brake arm

That's great. You can get metal-grinding round bits or round files, round sanding-bits, etc for $10 or less usually. Most people have a drill already or can borrow one.

Originally Posted by Gator Wrestler View Post
I have developed a method of enlarging the sprocket hole that is quick and accurate.
I use a power hand drill with a round file chucked into it. The sprocket hole is placed over the round file and using the other hand to hold another file (I use a curved one) the drill is run at a high speed. The sprocket is allowed to spin and the action of both files on opposing sides of the hole quickly enlarge the hole. Don't forget your safety glasses.

Reply With Quote