Dumore 57-021 8587-210 1/2 HP 120V Internal/External Spindle Tool Post Grinder

The Dumore 57-021 (catalog number referenced on box and case label) is a new 1/2 HP, 120V AC tool post grinder designed for mounting on the tool post of a lathe to perform both internal and external grinding operations. The unit features Dumore's interchangeable spindle system, allowing the operator to swap between internal and external grinding spindle assemblies without removing the grinder from the tool post, and is driven via a V-belt from the dedicated motor to the grinding spindle head. The kit includes the motor and drive head assembly, internal and external spindle assemblies with flanged wheel mounts, a V-belt, belt guard, wheel flanges/cups, open-end wrenches, a mounting clamp, power cord, and a molded hard-shell carrying case — everything required for lathe-mounted cylindrical and bore grinding. Manufactured by Dumore Corporation in Mauston, WI, USA, this Series 57 grinder is suited for precision OD and ID grinding on engine lathes with a capacity typically accommodating swing and cross-slide travel commensurate with the Series 57 design envelope.

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