5/16 in Nominal Size
ER20-5/16 is the 5/16 in nominal tool-shank variant for the ER20 collet family.
Royce Ayr ER20 Precision Collet – 5/16" Tool Shank – DIN 6388
CA$999.99
Out of stock
SKU
ER20-5/16
Product Type
Precision ER20 ER Collet
Collet Series
ER20
Nominal Tool Shank
5/16 in (7.9375 mm)
Standard
DIN 6388
Overall Length
1.24 in (31.5 mm)
Outside Diameter
0.83 in (21 mm)
Machine Type
CNC Router
Installation
Snap collet into nut before threading nut onto tool holder
Precision ER20
Collet
Precision ER20 Collet
Royce Ayr ER20-5/16 is a 5/16 in precision ER20 collet for securely clamping compatible round tool shanks in ER20 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.
5/16 inNominal Tool Shank
ER20Collet Series
31.5 mmCollet Overall Length
DIN 6388Collet Standard
Precision ER20 Collet
5/16 in nominal tool-shank collet for compatible ER20 holders and nuts, with family identification dimensions of 31.5 mm OAL and 21 mm OD.
ER20DIN 63885/16 inSKU ER20-5/16
Compatible ER20 toolholders and collet nuts. Verify the holder/nut family and nominal tool-shank size before installation.
Main Product Description
The Royce Ayr ER20-5/16 is a precision ER20 collet sized for a 5/16 in round tool shank. It is intended for compatible CNC-router toolholders and collet nuts using the ER20 system.
Royce states its collets conform to DIN 6388. The ER20 family-identification envelope is 31.5 mm overall length and 21 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
ER20 Collet
- Royce Ayr
- Precision ER20 ER Collet
- ER20-5/16
- Precision Tool Holding & Clamping
- ER20
- 5/16 in (7.9375 mm)
- DIN 6388
- 1.24 in (31.5 mm)
- 0.83 in (21 mm)
- CNC Router
- Snap collet into nut before threading nut onto tool holder
- 5/16 in
- CNC Router Toolholding · Precision Tool-Shank Clamping · Router Bit Holding
- Compatible ER20 toolholders and collet nuts. Verify the holder/nut family and nominal tool-shank size before installation.
Best Fit Applications
CNC Router Toolholding
Precision Tool-Shank Clamping
Router Bit Holding
Drill & Boring Tool Holding
ER20 Toolholder / Nut Systems
Product Highlights
DIN 6388 · ER20
The ER20 family envelope is 31.5 mm OAL by 21 mm OD, supporting positive collet-family identification.
Correct Nut Installation
Royce specifies snapping the collet into the nut before threading the nut onto the tool holder.
Compatibility & Installation Notes
Use only with compatible ER20 toolholders and collet nuts. Confirm the nominal 5/16 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.
Precision ER20 Toolholding
Royce Ayr ER20-5/16 combines a 5/16 in nominal tool-shank size with the verified ER20 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.