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RM-3 Low Temperature Rotary Stage

RM-3 Low Temperature Rotary Positioner

Thermal Chamber
Envirotronics Thermal Chamber

This version of the RM-3 is designed to operate from -50°C to 70°C. To achieve this temperature range, we use a specially designed stepper motor, Molykote 33 grease on all bearings and worm gear, and the housing is also modified to allow proper bearing fit at -50°C. The RM-3 design takes advantage of a single preloaded crossed roller bearing for the table movement. This design approach eliminates the use of a dual bearing configuration thus improving on axial runout and wobble. This rotary table utilizes a worm gear drive with available gear ratios of 90:1 and 45:1. The RM-3 is available with an optical home switch and 4000 CPR rotary encoder.

We use an Envirotronics thermal chamber to verify operation of each stage at the temperature extremes.


RM-3 Rotary Stage – Extended Temperature

Typical lead-time: 6-7 Weeks
Part No. N/A
0.29 arc-sec (90:1 gear ratio, 250 microsteps)
±72 arc-sec
Max. Speed
Stepper Motor: 25°/sec (90:1 gear ratio), 45°/sec (45:1 gear ratio)
Unidirectional Repeatability
10 arc-sec
125 arc-sec
Max Load Capacity
20.4 kg (45 lbs)
Travel Range
360° Continuous
Optical rotary encoder mounted to rear of motor, 4000 CPR with Index
Limit Switches
Optical Home Switch Index mark on encoder 
Gear Ratio
90:1 or 45:1
Stage Weight
1.4 kg (3 lbs)
Aluminum Alloy Construction
Black Anodize
Operating Temperature
-50°C to 70°C
* Specifications are at room temperature (23°C)
RM-3 Motorized Rotary Stage RM-3 Motorized Rotary StageClick to Enlarge
Motor Options
Size 17 Stepper Motor
  • NEMA 17 high torque brushless motor
  • 1.33 Amp/Phase
  • 2.5 Ohm/Phase
  • 42 oz-in holding torque
  • 1.8 degrees/step
  • Compatible with the following motion controllers: NSC-A1 Series | NSC-A2L Series | NSC-G Series
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