1/8 in Nominal Size
ER16-1/8 is the 1/8 in nominal tool-shank variant for the ER16 collet family.


Royce Ayr ER16-1/8 is a 1/8 in precision ER16 collet for securely clamping compatible round tool shanks in ER16 toolholding systems. Royce states its collets conform to DIN 6388 and should be snapped into the nut before the nut is threaded onto the tool holder.
1/8 in nominal tool-shank collet for compatible ER16 holders and nuts, with family identification dimensions of 27.5 mm OAL and 17 mm OD.
Compatible ER16 toolholders and collet nuts. Verify the holder/nut family and nominal tool-shank size before installation.
The Royce Ayr ER16-1/8 is a precision ER16 collet sized for a 1/8 in round tool shank. It is intended for compatible CNC-router toolholders and collet nuts using the ER16 system.
Royce states its collets conform to DIN 6388. The ER16 family-identification envelope is 27.5 mm overall length and 17 mm outside diameter.
For installation, snap the collet into the nut first, then thread the nut onto the tool holder. Verify nominal shank size, clean mating surfaces, correct holder/nut family and proper tightening procedure before running the machine.
Technical Specifications
ER16-1/8 is the 1/8 in nominal tool-shank variant for the ER16 collet family.
The ER16 family envelope is 27.5 mm OAL by 17 mm OD, supporting positive collet-family identification.
Royce specifies snapping the collet into the nut before threading the nut onto the tool holder.
Use only with compatible ER16 toolholders and collet nuts. Confirm the nominal 1/8 in tool-shank size before clamping. Keep the collet, nut and holder mating surfaces clean; snap the collet into the nut before threading the nut onto the holder; and do not mix collet families that may appear visually similar.
Royce Ayr ER16-1/8 combines a 1/8 in nominal tool-shank size with the verified ER16 family envelope and DIN 6388 toolholding standard.
Correct holder-family matching, clean seating, proper nut assembly and appropriate tightening are essential to concentric clamping and reliable CNC-router tool retention.