Product Description:

The TBMS-12995-A is a frameless brushless torque motor kit manufactured by Kollmorgen as part of the TBM Frameless Motors series. Supplied as separate stator and rotor components, the unit is intended for direct installation into robotic joints, rotary stages, and other compact axes where the mechanical envelope is tightly constrained. Once mated with customer-supplied bearings and feedback, the kit provides the electromagnetic core that drives continuous rotation in precision industrial automation equipment. Because the motor is frameless, the surrounding machine structure provides the bearing support and housing alignment instead of a complete motor body.

Electrical sizing is based on a bus voltage of 100 VDC; at this level the winding draws a continuous phase current of 16.30 A. Under these conditions, the motor produces a continuous stall torque of 10.400 N·m, enabling the axis to hold static loads without an external brake. Dynamic operation is limited to a maximum speed of 2700 rpm, so gear ratios or pulleys can be selected to match application bandwidth while remaining within the motor's operating range. With a rotor inertia of only 9.37 × 10⁻⁴ kg·m², acceleration and deceleration commands can be executed quickly, which helps shorten cycle times in pick-and-place arms and stabilized camera platforms.

During short-term transients, the electromagnetic system withstands a peak phase current of 57 A, delivering a momentary stall torque of 36.20 N·m to overcome static friction or high startup loads. The winding insulation endures temperatures up to 155 °C, allowing brief overloads before thermal limits are reached. Mechanical integration is aided by a central aperture that measures 55.88 mm, permitting shafts, cabling, or pneumatic lines to pass straight through the motor body. The outside diameter is 128.88 mm and the mass is 4.050 kg, which helps compact assemblies stay within space and weight limits. The motor can operate down to -40 °C, allowing use in cold conditions without external cooling hardware.