Nikken NX4 CAT50 Spindle Speeder spinner 10,000RPM (CAT50U-NX4) with 7 collets

Description

This is a Nikken CAT50U-NX4 Spindle Speeder that I picked up at an industrial auction but decided against using it. It has an integral CAT50 shank with a pull stud included in the box. This speed increaser has an SK16 collet chuck on it and includes 7 collets with it (1/8", 3/16", 1/4", 5/16", 3/8" and two 13mm holders [one of which was being used for 1/2" end mills]).