Rotary Jiki Scale JR205 Incremental Encoder made by Sokki Electronics until 1990.

Since 1991, JR205 Series has been made with the brand name of Astec Magnetic Rotary Encoder
by Taiho Products Co. Ltd. Mail to MOC Mitaka

High reliability and long life based on more than 20 year continued and improved production after succeeding the business from Sokki. Compact encoder with high signal accuracy, standing against high temperature, high humidity, oil mist, dusts, vibration, shock, etc.

The following pictures were sent back to MOC_Mitaka from end-users to show what they had been using.
All of these were made before 1990 and the ball bearings were worn out fainally.

As you can see, the part numbers are not complete like Astec JR205 Series. Still such pictures help us to choose Astec equivalent.   When you give us pictures of the machine, the name of machine maker, machine name and model number, that will help even more.

Old label examples   Label -1   Label -2

Numbers following to R205 vanish after long time elaps in many cases. Click the Label -1 to refer to the present model number table and bracket drawing. Click Label -2 to decide which you want to take, F (grounded) or N (not grounded).