Product Description:

The U12FGT is a flat-profile DC motor manufactured by Kollmorgen for the ServoDisc Pancake DC Motors series. Its ironless disc armature minimizes cogging and makes the unit suitable for precise speed and position loops in assembly robots, pick-and-place heads, and electronic inspection equipment. By delivering smooth continuous torque in a short axial package, the motor helps reduce the overall machine envelope while maintaining rapid dynamic response.

The motor body has a basic length of 3.80 in and a housing diameter of 6.00 in, resulting in a compact, disc-like profile that simplifies installation where axial space is restricted. Its mass is only 6.20 lb, so the driven structure experiences minimal static loading when the assembly is mounted on lightweight frames. A low rotor inertia of 0.0252 oz-in-sec² allows servo drives to command fast speed changes without excessive overshoot. Power conductors exit the case through flexible leads sized at 18 AWG, while the integrated tachometer uses lighter 22 AWG wires to provide feedback to the drive. The separate wire sizes help distinguish the power and feedback connections during installation. The motor supports close-coupled pulleys or pinions without exceeding the shaft limits.

Four threaded mounting holes are arranged on a bolt circle of 5.500 in, and each hole has a 0.250-20 UNC-2B thread with a depth of 0.500 in for standard socket screws. The 1.313 in pilot diameter centers the case, while the shaft has a diameter of 0.625 in and carries a square key measuring 0.1875 in wide for positive torque transfer. An axial thrust of up to 150 lb and a radial force of 125 lb can be applied simultaneously, with the radial rating based on the load being positioned 1.00 in from the mounting face.