MSM115-89-402-S-0KA Kollmorgen
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MPN: M.1302.6899
The Kollmorgen MSM115-89-402-S-0KA is a brushless servo motor from the MSM Brushless Servo Motors series. It has a rated speed of 4000 rpm and delivers a continuous torque of 89 in-lb. The motor features a 19 mm shaft diameter, 105 mm flange size, and uses a single-turn hi-res encoder with sine/cosine feedback signal.
Internal Product Review
The MSM115-89-402-S-0KA is a Kollmorgen brushless servo motor that delivers 89 in-lb continuous torque at a 4000 rpm rated speed. Single-Turn Hi-Res encoding with sine/cosine feedback gives motion loops excellent resolution and stable commutation. A very capable servo motor for precise high-speed positioning.
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Product Description:
The MSM115-89-402-S-0KA servo motor is produced by Kollmorgen within the MSM Brushless Servo Motors series. Intended for closed-loop motion axes in packaging machines, pick-and-place robots, and general automation, the unit supplies repeatable rotary power when driven by a compatible amplifier. Its brushless construction reduces routine maintenance by eliminating brushes that would otherwise experience mechanical wear during operation. Integrated high-resolution feedback supports tight velocity and position loops for accurate motion in modern production cells. The motor’s mechanical envelope follows industry metric standards, allowing it to fit machine layouts designed around compatible metric interfaces.
It delivers a continuous torque of 89 in-lb, allowing moderate load handling without overheating, and maintains rated operation up to 4000 rpm for quick cycle times. A pilot diameter of 115 mm centers the frame on compatible gearboxes, while a bolt circle of 95 mm aligns the four 9 mm mounting holes with standard machine plates. The front face uses a 105 mm square flange pattern that supports installation with compatible IEC motor mounts. The keyway has a depth of 3.5 mm and a width of 6 mm, ensuring positive torque transmission to a properly fitted coupling. Position feedback is provided by a single-turn high-resolution encoder that outputs complementary sine and cosine signals for fine interpolation in the drive. This feedback arrangement allows the connected amplifier to monitor shaft position without requiring a separate external measuring device.
The output shaft measures 19 mm in diameter and extends 40 mm beyond the bearing, providing sufficient engagement for pulleys while keeping overhung mass close to the front bearing set. The bearings can tolerate a radial load of 48 kg at the maximum rated speed, helping prevent normal belt tension from shortening bearing life. An M-type key provides positive engagement between the shaft and connected hardware. A tapped shaft hole uses an M6 × 1.0 mm thread with a depth of 16 mm, providing a secure attachment point for compatible puller hardware or an encoder wheel. The threaded features are rolled to help maintain concentricity between the shaft and installed coupling hardware. Proper shaft support and coupling alignment can also limit unnecessary radial stress on the front bearing during sustained operation.
