Foredom 1/6 hp Flex Shaft Motor Style M.SR. Foredom's 1/6 HP universal flexible shaft machine runs in forward and reverse rotation at speeds up to 18000 RPM. The M.SR combines the most important features customers expect - power reversibility reliability and versatility - all in one motor. It comes equipped with a motor bale for hanging and our standard 39"" long key tip shafting for connecting to any of Foredom's interchangeable quick disconnect handpieces. This item has a two year limited warranty.