Danfoss TMTU 315 151Z3101 orbital hydraulic motor

Danfoss TMTU 315, part number 151Z3101, is a fixed-displacement orbital hydraulic motor for low-speed, high-torque drives. The factory geometric displacement is 326.3 cm³/rev. Nominal size 315 identifies the series size and differs from the exact geometric displacement.

This is a bearingless short motor. It has no separate output shaft or motor output-shaft bearing assembly. The driven component must provide the correctly supported mating shaft and internal coupling geometry. Follow the original installation, lubrication and drain instructions; a standard motor shaft drawing does not define this execution.

Mounting type: 6 Bolt - Short; locating pilot 140.0 mm; bolt circle 110.0 mm. Main port connection: 1 1/16-12 UN-2B SAE O-Ring port. Drain connection: 9/16-18 UNF-2B O-Ring port. Port arrangement: Sideport - staggered. The motor uses Geroler gearing and disc valve with valve drive. Factory check-valve provision: No.

Select the operating point from the size-specific hydraulic data and performance diagram. Continuous, intermittent and peak limits represent separate operating duties and must not be combined into one maximum-duty point. Differential pressure differs from maximum inlet pressure. Observe the applicable shaft loading, shaft-seal pressure, return pressure and drain requirements.

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