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Manufacturer number:
Cat. No.:
ER collet chuck, ultra-short, BT 40, for ER collet size: 25
Article no.: 302875 25
Article code:
Product details
Technical Data
| Through-coolant | no | |
| Entry of cooling lubricant | with cooling lubricant entry, axially concentric | |
| Escape of cooling lubricant | with cooling lubricant exit, axially concentric | |
| Cooling lubricant | yes | |
| Holder type | iSO taper | |
| Holder shape | flat surface contact, standard taper form E | |
| Holder version | metric | |
| Holder size, metric | 0400 mm | |
| Type of mounting | spigot | |
| Shank length | 63 mm | |
| Interface on machine side | BT 40 | |
| With flat surface contact | no | |
| Min. clamping diameter | 1 mm | |
| Max. clamping diameter | 16 mm | |
| For collet type | ER collet | |
| Collet size | 25 | |
| Gauge length | 33 mm | |
| External diameter, tool-end | 27 mm | |
| External diameter of clamping nut | 32 mm | |
| Min. tool clamping length | 8 mm | |
| Max. tool clamping length | 14 mm | |
| Concentricity | 3 µm | |
| Balance quality G at rotational speed | g 2.5 at 25,000 rpm | |
| Machining strategy | HSC | |
| Format | ultra-short | |
| Width across flats | 24 mm | |
| Interface | joint 1; joint 2 | |
| Type of product | collet chucks | |
| Overall length | 98.4 mm | |
| Overall height | 27 mm | |
| Overall width | 27 mm | |
| Standard | ISO 7388-2; JIS B6339 | |
| Shape | AD | |
| With width across flats | yes | |
| Through-coolant available | no | |
| Material | heat-treatable steel | |
| Content | 1 pcs. |
Identification & Classification
| Article number | 302875 25 | |
| EAN / GTIN | 4062406114435 | |
| Manufacturer number | 302875 25 | |
| 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. Ultra-short type with internal precision clamping nut. Best suited to working in restricted working areas, with higher stability.
Application:
For clamping tools with parallel shank in collets to DIN 6499 − Form A and B.
Supplied with:
ER clamping nut (internal).
Optional extras:
ER collets No. 308881 − 309434, pull studs (PS) No. 308760 − 308802, PS wrenches No. 308820 – 308835.
Note:
Matching clamping nut No. 309621.