Stock Distributors

Need more information?

Contact us to request pricing, availability and customization options

Contact Us


Shaft Diameter 1/4” thru 3/8” and metric versions. Hollow shaft, hub shaft or thru-shaft versions available
Flats On Shaft 0.75” long X 0.03” deep
Shaft Loading Up to 40 lbs. axial and 40 lbs. radial
Shaft Runout .001 T.I.R. maximum
Starting Torque at 25°C

1.0 in-oz maximum without shaft seal;2.5 in-oz maximum with shaft seal; 4.0 in-oz thru-shaft

Bearings 52100 bearing steel
Shaft Material 303 stainless steel
Bearing Housing Die cast aluminum with iridite finish; stainless steel (special feature)
Cover Die cast aluminum with protective finish (For MS or CS terminations), otherwise drawn aluminum with protective finish; stainless-steel (special feature)
Bearing Life 1.5 X 109 revs at rated load (10,000 hrs at 2500 RPM)
Maximum RPM 8,000 RPM (see frequency response, below)
Moment of Inertia 2.0 X 10-4 oz-in-sec2
Weight 9 oz. typical


Code Incrementa
Output Format 2 channels in quadrature, 1/2 cycle index gated with negative B channel as standard. Ungated index when OC is specified as the output device
Cycles per Shaft Turn 1 to 4096 (see table A) For resolutions above 1024 contact BEI for interpolation options
Supply Voltage 5 to 28 VDC available
Current Requirements 100 mA typical + output load, 250 mA (max)
Voltage/Output (see note 5) 28V/V: Line Driver, 5–28 VDC in, Vout = Vin 28V/5: Line Driver, 5–28 VDC in, Vout = 5 VDC 28V/OC: Open Collector, 5 – 28 VDC in, OCout
Protection Level Reverse, overvoltage and output short circuit
Frequency Response 100 KHz (up to 1024 cpt; 400KHz with interpolation option (see note 7))
Output Terminations see Table 1, following pages


Enclosure Rating NEMA 4 & 13 (IP66) when ordered with shaft seal (on units with an MS connector) and a cable gland (on units with cable termination)
Temperature Operating, 0° to 70°C; extended temperature testing available (see note 8); Storage, -25° to 90°C unless extended temperature option called out
Shock 50 g’s at 11msec duration
Vibration 5 to 2000 Hz @ 20 g’s
Humidity 98% RH without consideration