Type M designation
Keep the ER20M or ER25M code intact; do not silently substitute a standard nut arrangement.
Catalog reference view. final supplied configuration confirmed by quotation.
C-ERM
Straight Shank ER Collet Chucks Type M
Overview
Type M straight shank ER holders for reach extensions and compact machine setups.
AvailabilityConfirm before order
Lead timeQuote based
Product details
Type M straight shank ER holders provide the catalog's ER20M and ER25M connection formats on selected cylindrical shanks. Their dimensions are listed as total L, L1, shank C and body D. Select the receiving holder and required reach together, then confirm the Type M nut and collet arrangement for the intended tool.
Cylindrical shank
Match the C dimension to the receiving holder and confirm adequate engagement.
Two length references
Compare both L and L1 with the drawing when checking tool access.
Specifications & model range
Dimensions are in millimeters unless otherwise stated. Confirm the final drawing before ordering.
- Shank diameter C
- 20, 22, 25 mm
- Collet systems
- ER20M, ER25M
- L1
- 60-180 mm
8 catalog rows
| Ordering code | L | L1 | C | D |
|---|---|---|---|---|
| C20-ER20M-60 | 100 | 60 | 20 | 28 |
| C20-ER20M-100 | 140 | 100 | 20 | 28 |
| C20-ER20M-120 | 160 | 120 | 20 | 28 |
| C20-ER20M-150 | 190 | 150 | 20 | 28 |
| C20-ER20M-180 | 220 | 180 | 20 | 28 |
| C22-ER20M-140 | 180 | 140 | 22 | 28 |
| C25-ER20M-140 | 168 | 140 | 25 | 28 |
| C20-ER25M-100 | 150 | 100 | 20 | 35 |
No matching model in this table. Try a shorter code or send us your drawing.
Ranges and slash-separated values describe catalog families, not every possible combination. Confirm the complete model and drawing before ordering.
Shipping photos & packing
Agree the packing method and photo requirements when confirming your order.
Order-specific photo confirmation
Verified dispatch photos for this series have not been uploaded. Request photographs of your selected model, protective packing and shipping label when confirming your order.
Discuss packing requirementsPhotos to confirm before dispatch
Use this checklist to agree what should be documented for your selected model.
- Type M code distinguished from C-ER
- Cylindrical shank and nut protected
- Total and reference lengths traceable to the order
Stock, dispatch date and shipping method are confirmed with the quotation. Website images are not live inventory evidence.
Application scenarios
Typical selection contexts for this series, not customer project claims. Confirm machine compatibility and cutting conditions for your setup.
Restricted tool access
Comparing the listed Type M envelope with surrounding fixture geometry.
Custom tooling setups
Using a confirmed cylindrical-shank extension in a purpose-designed holder assembly.
Reach replacement
Matching an existing C-ERM extension by its complete dimensions.
Related product series
Compare alternative interfaces and complementary tooling. A related series is not automatically interchangeable.
C-ER
Straight Shank ER Collet Chuck Extensions
Models and specifications
ER8-ER40
ER Precision Collets
Models and specifications
BT30 / BT40 / BT50
BT ER Collet Holders
Models and specificationsCan I replace ER20M with ER20 without checking the drawing?
Do not assume the complete nut and holder arrangement is identical. Confirm the actual Type M geometry.
Does the extension fit any receiving chuck with the same nominal diameter?
Confirm the clamping method, usable engagement, clearance and operation as well as nominal diameter.
Which length should I quote, L or L1?
State both with reference to the drawing. They are separate catalog dimensions.
Is additional reach supplied with a speed guarantee?
No speed or assembled performance rating is established here. The complete extended setup must be reviewed.