Winona Van . Winona Van Norman Portable Crankshaft Grinder Polisher In The Block Intheblok. 500.00. Lempco . Lempco Crankshaft Grinding Machine. Machine Shop Crank Grinder. 4 500.00. Berco Rtm260 . Berco Rtm260 Crankshaft Grinder Manual. 39.95. Berco Rtm300 . Berco Rtm300 Crankshaft Grinder Manual Rtm-300.