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EAN / GTIN:
Manufacturer number:
Cat. Nr.:
ER collet chuck Form AD, BT 50 short, for ER collet size: 40
Article no.: 303740 40
Article code:
- Arbor standard: JIS B6339; JIS B6339
- Shape: AD
- Balance quality G at rotational speed: G 2.5 at 25,000 rpm
- Concentricity: ≤ 3
- Machining strategy: HSC
Product details
Technical Data
| for ER collets | 40 | |
| Clamping ⌀ D1 | 3-26 mm | |
| Adapter | BT 50 short | |
| Arbor standard | JIS B6339; JIS B6339 | |
| Shape | AD | |
| Balance quality G at rotational speed | G 2.5 at 25,000 rpm | |
| Concentricity | ≤ 3 µm | |
| Machining strategy | HSC | |
| Clamping range | 3 mm - 26 mm | |
| Overhang dimension A | 80 mm | |
| a | 1.5 mm | |
| External ⌀ D | 63 mm | |
| Spare ER clamping nut No. 309580 | 40 | |
| ER chuck key No. 309680 | 40 | |
| Version | BT-DC | |
| Balluffchip bore | yes | |
| Type of product | Collet chuck |
Identification & Classification
| Article number | 303740 40 | |
| EAN / GTIN | 4062406250386 | |
| Manufacturer number | 303740 40 | |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Description
Version:
Taper ground internally and externally. All shanks hard turned (for smooth running!). With RFID/Balluffchip bore.
- High-quality precision clamping nut.
- Clamping nut balanced for HSM (G2.5/25,000 rpm).
- Optimum wear characteristics and torque transmission due to the coated precision clamping nut.
Advantage:
The double contact between the taper and the flat flange creates a more stable and precise clamping situation:
- Better surface quality
- Longer tool life times
- Consistent seating in the headstock (even at high speeds)
- Smaller radial run-out
Application:
For clamping tools with parallel shank in collets to DIN 6499 Form A and B.
Supplied with:
ER clamping nut.
Optional extras:
ER collets No. 308881 − 309434, ER chuck keys No. 309680 – 309720 or 613300, ER clamping nut 309610.
Pull studs (PS) No. 308760 − 308806. Pull stud wrenches No. 308820; 308835.
Pull studs (PS) No. 308760 − 308806. Pull stud wrenches No. 308820; 308835.