Product Description:

The TBM-12995-B is a frameless torque motor stator-rotor set produced by Kollmorgen within the TBM Frameless Motors series. It is intended to be built directly into the machine housing and shaft, so the motor can provide direct-drive motion without the size of a conventional housed assembly. In industrial automation, it delivers precise low-speed torque for rotary tables, collaborative joints, and compact actuators where backlash reduction, compact packaging, and tight servo control are important. Its frameless format also leaves more room for bearings, feedback devices, and surrounding structural parts in compact mechanisms.

Operating from a design bus of 48 VDC, the motor draws a continuous phase current of 18.10 A to maintain its thermal rating. Under these steady-state electrical conditions, it can hold a continuous stall torque of 9.880 Nm, which supports stable output when the shaft is stopped or moving slowly. When motion is commanded, the rotor reaches a rated speed of 625 RPM, which suits direct-drive axes that prioritize positioning accuracy over high shaft speed. For short dynamic events, the drive can deliver up to 57 A of peak current, and the magnetic structure fits within an outside diameter of 128.88 mm. That compact diameter helps the motor fit into space-limited rotary platforms and other integrated motion assemblies.

Mechanical response is shaped by a peak stall torque capability of 31.00 Nm, allowing brief torque bursts to overcome static friction or absorb changing load demands. The rotor’s mass moment of inertia is 9.37 E-04 kg·m², which supports quick acceleration while preserving stable control during fine positioning moves. A total assembly weight of 4.050 kg keeps added mass low on moving axes such as robotic wrists, gimbals, and compact indexers. The low assembly mass also reduces the load carried by supports and moving links.