Friedrich Schmaltz
From Graces Guide
Friedrich Schmaltz, G.m.b.H., Offenbach, Germany
1927 Description of grinding machines for inside axle journals and outside journals[1]
1937 Description of piston ring grinding machines. 'Piston rings are ground on a production basis by a series of automatic grinders made by Messrs. Friedrich Schmaltz, G.m.b.H., Offenbach a.M., Germany, .... By these machines, piston rings, ball-bearing rings, and similar parts can be ground to a limit of 0.0002 in. for parallelism, with only occasional attention on the part of a semi-skilled operator. ....'[2]
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