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HiRunER precision ER collet chuck, BT 40 A = 70, for ER collet size: 32
Article no.: 302843 32
Article code:
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Standard ER chuck -> Collets are not inserted 100 % into the chuck.
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HiRunER -> the full surface of the collet is seated in the chuck -> higher retention forces! -> better concentricity.
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- Arbor standard: JIS B6339; ISO 7388-2
- Shape: ADB
- Balance quality G at rotational speed: G 2.5 at 25,000 rpm
- Concentricity: ≤ 3
- Machining strategy: HSC; HPC
Product details
Technical Data
| Adapter | BT 40 A = 70 | |
| Arbor standard | JIS B6339; ISO 7388-2 | |
| Shape | ADB | |
| Balance quality G at rotational speed | G 2.5 at 25,000 rpm | |
| Concentricity | ≤ 3 µm | |
| Machining strategy | HSC; HPC | |
| Clamping range | 2 mm - 20 mm | |
| Overhang dimension A | 70 mm | |
| External ⌀ D | 52 mm | |
| Spare ER clamping nut No. 309617 | 32 | |
| ER chuck key No. 309748; No. 309749 | 32 | |
| Balluffchip bore | yes | |
| Type of product | Collet chuck |
Identification & Classification
| Article number | 302843 32 | |
| EAN / GTIN | 4045197771605 | |
| Manufacturer number | 302843 32 | |
| Manufacturer/responsible person | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Description
Version:
External and internal tapers are ground. All shanks are hard turned for smooth running. Including RFID / Balluffchip bore, high-performance clamping nut (up to 25000 rpm).
Advantage:
- Excellent concentricity in the system (chuck + collet + clamping nut), 3µm radial run-out with a 2µm collet, 6µm radial run-out with a 5µm collet.
- Extremely strong holding force (up to factor 2 better than the standard ER chuck).
- Vibration reduction effect due to 2-part clamping nut.
Application:
For clamping tools with plain shank in collets to DIN 6499 − Form A and B.
Supplied with:
Precision clamping nut.
Optional extras:
Pull studs (PS) No. 308760 – 308802, PS wrenches No. 308820 – 308835, ER chuck keys No. 309757, 309758 (for 11M and 16M); ER collets Fahrion No. 308901 – 309434. ER collets No. 308901 − 309432, hook spanner 628400 or torque wrench 309749 or 628520.
Note:
- Clamps only nominal ⌀ up to shank ⌀ tolerance h 10.
- Do not use the clamping nut in combination with a sealing washer.
- Use it in only combination with Fahrion collets.
- The blue design ring must be removed for Fahrion HP 2µm ER collets.