Incremental Thru-Bore & Motor Mount Encoders


Incremental encoders provide position information for a rotating shaft by producing a continuous series of pulses. These pulses correspond to increments of resolution on the code disk. Incremental thru-bore and hollow-bore encoders are designed to mount directly to a rotating shaft which passes through the encoder. A flexible tether mount keeps the encoder from rotating with the shaft and absorbs shaft run-out or endplay, minimizing loads on the encoder bearings. Motor-mount style encoders feature a machined housing that attaches a hollow-bore encoder to the NEMA frame motor. To meet varied industrial feedback requirements, EPC offers a broad range of incremental thru-bore and motor mount encoders.

Model 15T/H

  • 1.5"  thru-bore or blind hollow bore
  • Resolutions up to 10,000 CPR
  • Sealing up to IP64

Model 755A Hollow Bore

  • 1.5" blind hollow bore encoder
  • Resolutions up to 30,000 CPR

Model 755A NEMA

  • Mounts directly onto NEMA motors
  • Resolutions up to 30,000 CPR

Model 121

  • 2.10" thru-bore modular encoder
  • Resolutions up to 2500 CPR
  • Includes IP50 dust seal kit

Model 260

  • 2.0" thru-bore or blind hollow bore
  • Resolutions up to 10,000 CPR
  • Sealing to IP64

Model 225A/Q

  • 2.25" economical thru-bore 
  • Single channel or quadrature incremental feedback

Model 58TP

  • 58 mm programmable encoder
  • Thru-bore or blind hollow bore
  • Programmable resolution, waveform, and output type
  • Resolutions up to 65,536 CPR
  • Sealing up to IP67

Model 58TF

  • 58 mm encoder
  • Thru-bore or blind hollow bore
  • Resolutions up to 65,536 CPR
  • Sealing up to IP67

Model 25T/H

  • 2.50" encoder
  • Thru-bore or blind hollow bore
  • Bores up to 1.125"/28 mm
  • Resolutions up to 30,000 CPR
  • Sealing to IP67

Model 775

  • Thru-bore design
  • Easily mounted onto motors
  • Bore options to 1.375"
  • Resolutions to 4096 CPR

Model 776

  • Thru-bore design
  • Slim profile – only 1.36" deep
  • Easily mounted on motors
  • Bore options to 1.875"
  • Resolutions to 4096 CPR

Model 770 NEMA

  • Thru-bore design
  • Slim profile – only 1.00" deep
  • Fits NEMA Size 56C thru 184C motor faces (4.5" AK)
  • Resolutions to 4096 CPR

Model 771 NEMA

  • Thru-bore design
  • Large bore size to 1.875" or 43 mm
  • Fits NEMA Size 182TC thru 256TC motor faces (8.5" AK)
  • Resolutions to 4096 CPR

Model 702 Motor Mount

  • Motor mount encoder
  • Mounting flange available with boss
  • Resolutions to 30,000 CPR
  • Sealing up to IP66
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Model 865T NEMA

  • C-face thru-bore design
  • Stainless steel housing
  • Fits NEMA Size 56C thru 184C motor faces (4.5" AK)
  • Resolutions to 4096 CPR

Direct Motor Replacement Kit

  • Model 25T encoder
  • 10-pin bayonet or 10-pin MS connector
  • Tether flex mounts
  • Bore sleeve inserts

Large Motor Kit

  • Model 25T encoder
  • 10-pin MS style connector
  • SG tether arm kit
  • 56C protective cover

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Customer Service


Questions? Give us a call at (800) 366-5412 or submit this form, and we'll contact you within one business day.