O.T. How to enlarge a large hole slightly?

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Posted by Sherman in Idaho [108.162.245.23] on Wednesday, July 13, 2016 at 11:59:54 :

Any machinists out there with a easy trick to enlarge a 2-1/4" hole in cast iron, about 1" deep, by maybe .005"? I have a spring-type cylinder hone, but they don't seem to really take off much material, and I think 2-1/4 is too big for a brake cylinder hone and too small for an engine home. I have a 2-1/8" sanding drum -- close but not ideal. It's way too big for adjustable reamers. Flap wheel? DIY tight-fit sanding drum? Patience with the cylinder hones? Some other better idea?

Follow Ups:

how about a ridge reamer for engine cylinders? - JohnD 20:47:57 07/14/2016

Re: O.T. How to enlarge a large hole slightly? - Greg Coffin 20:47:33 07/13/2016

Re: O.T. How to enlarge a large hole slightly? - Vaughn 20:36:45 07/13/2016

take it to a automotive machine shop - wayneh 17:07:50 07/13/2016

Re: O.T. How to enlarge a large hole slightly? - DingoBoy 14:51:01 07/13/2016

Re: O.T. How to enlarge a large hole slightly? - moparmogsteve 14:44:45 07/13/2016

Slightly out of the box - Russ/Wyo 13:36:54 07/13/2016

Re: Slightly out of the box - Jerry in Idaho 12:11:07 07/14/2016
- Re: Slightly out of the box - Russ/Wyo 13:41:15 07/15/2016

Re: O.T. How to enlarge a large hole slightly? - Kevin in Ohio 13:04:56 07/13/2016

Second thought - Kevin in Ohio 13:17:25 07/13/2016
- Re: Second thought - Daryl in Oz 18:58:31 07/13/2016
- Re: Second thought - Chewie 14:44:17 07/13/2016

Is this for that "tight" bearing? Cat Donkey? - Chris Case 12:53:31 07/13/2016

Sort of - Sherman in Idaho 13:11:14 07/13/2016
- Torque of go kart motor vs pony? - Chris Case 14:04:50 07/13/2016
  - Reduction gearing - Sherman in Idaho 17:08:53 07/13/2016
  - That's the unknown - Sherman in Idaho 14:25:20 07/13/2016
    - Re: That's the unknown - Kaegi 18:34:33 07/13/2016
      - Re: That's the unknown - Sherman in Idaho 16:51:55 07/16/2016
        
        Re: That's the unknown - Kaegi 03:04:58 07/17/2016
    - Re: That's the unknown - David Lundstrom 15:05:29 07/13/2016

Re: O.T. How to enlarge a large hole slightly? - Kaegi 12:15:46 07/13/2016

Re: O.T. How to enlarge a large hole slightly? - Mark in FLG 16:59:26 07/13/2016
- Re: O.T. How to enlarge a large hole slightly? - Mark in FLG 17:07:01 07/13/2016

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