Servo Spindle Motors

STC1503 BT30

High Speed Robotic Servo Spindle

The PushCorp STC1503-BT30 high speed servo spindle is an ideal solution for robotic material removal applications such as:

  • Automated Grinding
  • Automated Sanding
  • Automated Polishing
  • Automated Deburring

The STC1503-BT30 features a powerful 3.0 hp [2.2 kW] servo motor that provides constant speed. This equipment is designed to mount parallel or perpendicular on the AFD310 and AFD72 force compliance devices. As a result, it has never been easier to program beautiful and consistent surface finishes.

The STC1503-BT30 may also be mounted directly to the robot with no force compliance device. This opens the door for rigid applications such as automated routing and deflashing.

The motor shaft is configured to accept standard BT30 tapered toolholders. Customers can choose to use standard off the shelf CNC tooling as well as custom PushCorp toolholders. Together, these components allow for a wide range of abrasive disks, wheels, drill bits and cutting tools. The STC1503-BT30 servo spindle comes standard with quick change functionality. Simply supply 90 PSI to drop off a toolholder, then release the air pressure to pick up a new one with a fresh abrasive.

The Kollmorgen S724 amplifier powers the servo spindle, provides analog speed control, and digital I/O. This can be ordered on it’s own or integrated into a UL certified control panel.


  • 3.0 horsepower [2.2 kW] servomotor (Liquid Cooling Required)
  • 15,000 maximum RPM
  • Fully adjustable and reversible speed
  • Uses standard BT30 Toolholders
  • Sealed bearings for long service life
  • PushCorp proprietary high-speed shaft seal
  • Mounts directly to PushCorp Active & Passive Compliant tools
  • Fail-safe pneumatic Toolholder release
  • All fittings, fasteners, and threaded holes are METRIC


Model STC1503-BT30
Power 3.0 hp [2.2 kW]
Continuous Stall Torque 2.57 lb.-ft. [3.5 Nm]
Speed Range 60-15,000 RPM
Speed Regulation ±5% (Reversible)
Tool Weight 28 lb. [12.7 kg]
Cooling Liquid
Required Toolholder BT30
Retention Knob Parlec 3003TRK or equiv.
Clamping Supply Air Dry, Non-lubricated 90 psi [6.2 bar] Minimum 100 psi [6.9 bar] Maximum