A W-Series Collet is a high-precision, draw-in type work-holding collet widely used on cylindrical grinding machines, tool & cutter grinders, milling fixtures, and inspection setups.
It provides excellent concentricity, rigidity, and repeatability, making it ideal for grinding and finishing operations.
KEY FEATURES
- • Very high concentricity (low TIR)
- • Strong, rigid draw-in clamping
- • Ideal for grinding & finishing
- • Long life with hardened & ground finish
- • Interchangeable with standard W-series chucks
W-SERIES COLLET – STANDARD DIMENSION TABLE
|
W Size
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Length (L) mm
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Max Holding Capacity (mm)
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Typical Use
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|
W12
|
32
|
12
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Small precision parts
|
|
W16
|
40
|
16
|
Tool room jobs
|
|
W20
|
50
|
20
|
Cylindrical grinding
|
|
W25
|
58
|
25
|
Medium grinding work
|
|
W32
|
70
|
32
|
Heavy grinding
|
|
W40
|
85
|
40
|
Large diameter jobs
|
Each W collet generally holds one exact size (tight tolerance), not a wide range like ER.
CONSTRUCTION DETAILS

- • Material: Spring Steel / Alloy Steel
- • Heat Treatment: Hardened & tempered
- • Hardness: 58 HRC
- • Finish: Precision ground ID & OD
- • Slots: Uniform precision slits for even clamping
TYPES OF W-SERIES COLLETS
- • Standard round W collet
- • Step W collet
- • Emergency (soft machinable) W collet
- • Special profile W collet (as per job)
APPLICATIONS
- • Cylindrical grinding machines
- • Tool & cutter grinders
- • Milling & inspection fixtures
- • Precision shafts, pins & tools
- • Tool rooms & production grinding
SUPPLY OPTIONS
- • Sizes: W12 to W40 (standard)
- • Metric & inch bores
- • Hardened or soft (machinable)
- • Custom bore & tolerance as per drawing
- • Export-quality