30 mm Special Size
ER40-30 is the 30 mm nominal tool-shank ER40 variant in Titan inventory; exact special-envelope dimensions are not claimed without verification.


Royce Ayr ER40-30 is a 30 mm precision ER40 collet for securely clamping compatible round tool shanks in ER40 toolholding systems. Royce states its collets conform to DIN 6388; this 30 mm size is treated as a special variant and standard ER40 envelope dimensions are not assigned without exact verification.
30 mm nominal tool-shank collet for compatible ER40 holders and nuts. This 30 mm size is treated conservatively as a special variant.
Compatible ER40 toolholders and collet nuts. Verify the holder/nut family and nominal tool-shank size before installation.
The Royce Ayr ER40-30 is a precision ER40 collet sized for a 30 mm round tool shank. It is intended for compatible CNC-router toolholders and collet nuts using the ER40 system.
Royce states its collets conform to DIN 6388. The standard ER40 family identification envelope is 46 mm overall length by 41 mm outside diameter; however, 30 mm ER40 collets can use special/non-standard geometry, so those standard envelope dimensions are not assigned to this exact SKU.
For installation, snap the collet into the nut first, then thread the nut onto the tool holder. Verify nominal shank size, clean mating surfaces, exact holder/nut fit and proper tightening procedure before running the machine.
Technical Specifications
ER40-30 is the 30 mm nominal tool-shank ER40 variant in Titan inventory; exact special-envelope dimensions are not claimed without verification.
Royce identifies ER collets as DIN 6388-conforming toolholding; this page keeps the 30 mm special separate from standard ER40 envelope assumptions.
Royce specifies snapping the collet into the nut before threading the nut onto the tool holder.
Use only with a compatible ER40 toolholder and collet nut specifically able to accept this 30 mm variant. Confirm exact holder/nut fit and nominal shank size before clamping. Keep all mating surfaces clean and snap the collet into the nut before threading the nut onto the holder.
Royce Ayr ER40-30 provides a 30 mm nominal tool-shank ER40 collet while deliberately avoiding unsupported standard-envelope dimensions for this special size.
Correct holder-family matching, clean seating, proper nut assembly and appropriate tightening are essential to concentric clamping and reliable CNC-router tool retention.