Ball Hones

All KPMI® valve guide reamers are manufactured from premium hardened High Speed Steel. The advertised finished reamer diameters are ground to: +/- .0002”. These spiral fluted reamers incorporate a 1.00” long pilot (reduced diameter) which gets inserted into an unfinished guide bore, to align the reamer to the valve guide centerline, during the sizing process. These reamers have been specifically designed for KPMI® Manganese Bronze valve guides. Do not attempt to use these reamers to size C630, Nickel Aluminum Bronze guides. BC Series Flex-Hone are manufactured by Brush Research (BRM). The BC Series Flex-Hone tool is designed for use on any type or size of cylinder from 4mm up to 3" in diameter. This cylinder hone is designed for surface finishing and cross hole deburring in brake cylinders, wheel cylinders, hydraulics, pneumatics and valve guides. Although Ball Hones have many uses, KPMI® offers them primarily to be used after a guide has been reamed. Using a Ball Hone after reaming creates a uniform surface free of irregularity’s, which improves surface contact and reduces the risk of galling or seizure. Please see our FAQ for recommended clearances.

  • Silicon Carbide composite for Bronze or Cast Iron
  • Ideal for finishing a reamed hole
  • Cleaning up a used guide
  • Minor sizing less than a thou

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Showing 1-8 of 8 results