Dimensional identification
Compare the listed D and L values with the collet already used in the holder.
Catalog reference image with photograph and drawing.
Collets
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SK10-SK25
SK Collets
Overview
SK10, SK16, SK20 and SK25 collets with catalog body diameters and lengths. Match the SK system and individual tool bore before selecting replacement collets.
AvailabilityConfirm before order
Lead timeQuote based
Product description
SK collets in this catalog cover SK10, SK16, SK20 and SK25. Each family has its own body diameter, length and clamping range, so the holder designation and physical dimensions should be checked together. These pages describe the collet series only and do not establish a spindle-taper specification for a complete holder.
Clamping-size choice
Select an individual bore within the chosen SK family's catalog range.
Clear system naming
Specify SK collet series explicitly to distinguish it from other tooling labeled SK.
Check your replacement: SK10–SK25 dimension chart · SK16 vs SK20 comparison · Replacement worksheet
SK16 or SK20: compare the body, not just the bore
A 10 mm tool shank alone does not identify the collet family. Check the marking on the existing collet and holder, then compare the catalog body dimensions:
| Check | SK16 | SK20 |
|---|---|---|
| Body diameter D | 24.6 | 29 |
| Length L | 45 | 50 |
| Family bore range | 2.75–16 | 3.5–20 |
The bore ranges cover each family, not the capacity of one collet. Specify the individual tool-shank diameter and quantity; body dimensions help identify the family but do not by themselves approve compatibility.
Ask about SK16 collets or ask about SK20 collets. Include the holder designation, a clear marking photograph, measured body dimensions and the required bore.
If the holder is marked ER rather than SK, compare ER collet series and bore ranges instead; do not substitute by bore alone.
Download the SK collet replacement worksheet (fillable PDF, 2 pages)
Record the SK family marking, measured body diameter and length, then list each required tool bore and quantity. Include the holder code and clear photographs; a shared bore diameter alone does not establish compatibility.
Specifications & model range
Dimensions are in millimeters unless otherwise stated. Confirm the final drawing before ordering.
- Series
- SK10, SK16, SK20, SK25
- Family bore coverage
- 1.75-25 mm
- Length
- 30.5-57 mm
4 catalog rows
Select an underlined catalog reference to include that row in your inquiry.
| Series | Body diameter D (mm) | Family bore range d (mm) | Length L (mm) |
|---|---|---|---|
| SK10 | 15.6 | 1.75-10 | 30.5 |
| SK16 | 24.6 | 2.75-16 | 45 |
| SK20 | 29 | 3.5-20 | 50 |
| SK25 | 35.6 | 5.5-25 | 57 |
No matching model in this table. Try a shorter code, or send your required size or drawing.
Ranges and slash-separated values describe catalog families, not every possible combination. Confirm the complete model and drawing before ordering.
Application scenarios
Typical selection contexts for this series, not customer project claims. Confirm machine compatibility and cutting conditions for your setup.
SK holder service
Replacing a known SK collet in an existing toolholding system.
Milling and drilling
Selecting the appropriate collet bore for the tool shank and operation.
Maintenance inventory
Organizing spare collets by body family and bore designation.
Inspection & order review
Specify the dimensions, tolerances and records your order requires. Acceptance criteria must be agreed for the selected model.
Catalog fields to check
- Series
- Body diameter D (mm)
- Family bore range d (mm)
- Length L (mm)
Check the drawing reference faces and units. A catalog size alone does not define a tolerance or an inspection method.
Records to request
List any required dimensional report, material document or model identification photograph in your inquiry. Confirm availability and scope in the quotation.
For a drawing-based part, include the drawing revision and identify the critical dimensions. Website photographs are not inspection reports.
Packaging & delivery
Agree the packing method and photo requirements when confirming your order.
Order-specific photo confirmation
No verified shipment photographs for this series are currently published. Include selected-model, protective-packing and outer-label photos in your order requirements.
Discuss packing requirementsPhotos to confirm before dispatch
Use this checklist to agree what should be documented for your selected model.
- SK family and selected bore visible
- Clamping surfaces individually protected
- Body dimensions identifiable in inspection photos
Stock, dispatch date and shipping method are confirmed with the quotation. Website images are not live inventory evidence.
Technical resources
Product specifications
Keep a copy of the current series information for comparison. Confirm the final model and drawing before placing an order.
View specificationsCompare collet families
Distinguish ER, R8, C-type and SK connections before choosing a bore.
Read the guideRelated selection information
Browse the existing tooling guides and compare product families before selecting a model.
Browse technical resourcesRelated product series
Compare alternative interfaces and complementary tooling. A related series is not automatically interchangeable.
BT30 / BT40 / BT50
BT ER Collet Holders
Models and specifications
C20-C42
C Type Straight Shank Collets
Models and specifications
ER8-ER40
ER Precision Collets
Models and specificationsDoes SK here identify the machine spindle taper?
No. This page covers the SK collets listed in the company catalog, not a complete spindle-taper holder.
How do I distinguish SK16 from SK20?
Check the family marking, body diameter and length against the table rather than relying on appearance.
Is the listed range the capacity of one collet?
It is the family coverage. State the actual tool shank size so an individual collet can be confirmed.
Can an unmarked collet be matched?
Send measured dimensions and clear photographs of the collet and holder. The match requires confirmation before supply.