Interface and ER pairing
Choose the exact BT and ER combination shown in the ordering table.
Catalog reference view. final supplied configuration confirmed by quotation.
BT30 / BT40 / BT50
BT ER Collet Holders
Overview
BT collet chuck holders in ER25, ER32 and ER40 configurations with multiple gauge lengths.
AvailabilityConfirm before order
Lead timeQuote based
Product details
BT ER collet holders combine a BT30, BT40 or BT50 spindle interface with an ER25, ER32 or ER40 tool-clamping end. The catalog offers several gauge lengths within each interface family. Select the spindle connection, ER size and reach as separate decisions, then confirm the individual collets needed for the tool shanks.
Gauge-length options
Match reach to the fixture and workpiece; lengths vary by ordering family.
Complete assembly review
Confirm the machine's retention arrangement and whether nut and collets are included in the quote.
Specifications & model range
Dimensions are in millimeters unless otherwise stated. Confirm the final drawing before ordering.
- Spindle interface
- BT30, BT40, BT50
- Collet systems
- ER25, ER32, ER40
- Catalog gauge lengths
- 70-200 mm
9 catalog rows
| Ordering code | L1 | D1 | D |
|---|---|---|---|
| BT30-ER25-70/135 | 70/135 | 42 | 31.75 |
| BT30-ER32-70/100 | 70/100 | 50 | 31.75 |
| BT30-ER40-80 | 80 | 63 | 31.75 |
| BT40-ER25-70/100/125/150 | 70/100/125/150 | 42 | 44.45 |
| BT40-ER32-70/100/150 | 70/100/150 | 50 | 44.45 |
| BT40-ER40-80/100/120/150 | 80/100/120/150 | 63 | 44.45 |
| BT50-ER25-70/105/135/165 | 70/105/135/165 | 42 | 69.85 |
| BT50-ER32-80/100/120/150/200 | 80/100/120/150/200 | 50 | 69.85 |
| BT50-ER40-80/100/120/135/150 | 80/100/120/135/150 | 63 | 69.85 |
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.
- Complete BT–ER–length code visible
- Spindle taper and collet seat protected
- Nut and ordered collets counted separately
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.
General machining centers
Organizing milling and drilling holders around a confirmed BT spindle interface.
Fixture clearance
Comparing available lengths where clamps or workpiece geometry limit tool access.
Tooling standardization
Using one ER size across multiple holders with separately selected collet bores.
Related product series
Compare alternative interfaces and complementary tooling. A related series is not automatically interchangeable.
ER8-ER40
ER Precision Collets
Models and specifications
BT-SLB
BT SLB Side Lock End Mill Holders
Models and specifications
BT-SPU
BT SPU Integrated Drill Chuck Holders
Models and specificationsCan I choose any length for any BT–ER combination?
Use the options listed for the specific ordering family. Other lengths require a confirmed drawing and quotation.
Does the holder include every collet bore?
Do not assume so. List the required collets and nut in the inquiry so the package contents can be confirmed.
Can you specify a maximum operating speed from this table?
No. The catalog data does not establish a speed or balance rating for this series.
What is the difference from a BT side-lock holder?
This series holds the tool through an ER collet. The side-lock series uses a different clamping arrangement and needs separate selection.