Danfoss TMKW 250 151F6012 orbital hydraulic motor

Danfoss TMKW 250, part number 151F6012, is a fixed-displacement orbital hydraulic motor for low-speed, high-torque drives. The exact geometric displacement is 252.2 cm³/rev. The nominal size 250 is a series designation and should not be substituted for the geometric displacement.

The factory execution uses a tapered keyed shaft: Dia. 1 1/2 inch, 1:8 SAE J501, 1 - 20 UNEF-2A thread in shaft end. Mounting type: 4 Bolt - Wheel. The locating pilot is 107.9 mm and the bolt circle is 147.6 mm. Refer to the applicable original manufacturer drawing for tolerances, rear mounting interfaces and mating-part dimensions.

Main port connection: 1 1/16 - 12 UN-2B SAE O-Ring port. Drain connection: 7/16-20 UNF-2B O-Ring port. Port arrangement: Sideport - staggered. The factory specifies Geroler gearing, disc valve with valve drive and NBR - Standard shaft sealing. Check-valve provision: No.

Use the size-specific hydraulic data and applicable shaft-load and shaft-seal limits to select the operating point. Continuous, intermittent and peak limits describe separate duties; they are not a single combined maximum-duty point. Differential pressure is distinct from maximum inlet pressure. Drain routing and return pressure must follow the original manufacturer instructions.

Representative Danfoss TMK series photograph supplied on this article’s manufacturer page; shaft, ports, mounting, brake arrangement and displacement may differ. Use the technical PDF for exact specifications.