Product Description:

Brought to market by Kollmorgen, the ServoDisc Pancake DC Motors series includes the 9FGCHD pancake motor. This flat-armature design is intended for positioning tables, card feeders, and other automation axes where compact axial length and low inertia improve response. As a brushed DC unit, it supplies continuous torque directly from a 90-degree commutated disc, allowing motion controllers to regulate speed or hold a static load without complex gearing.

The overall body diameter is 4.750 in, while the basic stack measures only 2.29 in. This shallow profile allows the motor to fit behind timing pulleys or mount directly on precision stages. A mass of 3.2 lb minimizes structural loading and complements the rotor’s 0.0053 oz-in-sec² inertia, allowing velocity commands to settle quickly. The shaft diameter measures 0.375 +0/-0.001 in, providing adequate torsional stiffness for couplings while keeping the bearings compact. The shaft extends 1.000 in beyond the faceplate, and its 0.02 × 45° chamfer eases insertion into hubs. To accommodate keyed hardware, the shaft has a 0.688 in flat that is 0.03 in deep, preserving concentricity while providing a positive drive surface.

The gearhead option adds only 1.500 in to the stack, keeping the assembly short when additional reduction is required. Four mounting holes are drilled to a depth of 0.344 in on a 4.330 in bolt circle, and the threaded inserts use a No. 8-32 UNC-2B thread for commonly available hardware. The mounting hole count is 4, allowing the flange to be secured evenly to a compatible machine surface. Power exits through 18 AWG leads, so standard crimp contacts can carry the motor current without overheating. The compact flange arrangement allows the motor to align with compatible encoder housings or gearheads without requiring adapter plates.