DISK-1 1 in. Transmissive Rotary Encoder Disk

DISK-1 Features

  • 1 in. outside diameter
  • Mylar film construction
  • 32 to 5,000 CPR
  • Index track option
  • Compatible with US Digital's EM1 and EM2 encoder modules

See more info below

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DISK-1 Product Description

Restriction of Hazardous Substances

US Digital offers a wide variety of standard rotary encoder disks. They may be ordered as a stand-alone disk or as a hub disk. These rotary encoder disks are made from Mylar polyester film. This material allows for a wide temperature range.

The 32 CPR is available only in the No Index, EM1 Compatible option (NE). Other resolutions are available with or without an index track.

Mechanical alignment drawings for optical encoder rotary disks and optical encoder modules are available (see the EM1 and EM2 pages).

Product Specifications

View here or download the specifications


Inside Diameter (ID) tolerance ±0.004"
Outside Diameter (OD) 1" ± 0.010 in.
Thickness 0.007"
Temperature Range -40C to 100C


Title Date Description Download
Update to 1" and 2" Disks - PCN 6232 5/24/2018 This notice is to inform our customers of a minor disk design modification that is being implemented for standard 1" and 2" disks. This is a continuation of a change that was implemented for our index disks in 2015.

We are revising the text on the disk, adding the US Digital logo and a line that is used internally by our manufacturing group.

The change does not affect the quadrature or index tracks; therefore, it has no impact on form, fit, or function.

Additional Information

Product Notes

  • US Digital® warrants its products against defects in materials and workmanship for two years. See complete warranty for details.

Downloads Available



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