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HiRunER precision ER collet chuck, BT 40 A = 70, for ER collet size: 16
Article no.: 302843 16
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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Product details
Technical Data
| Through-coolant | no | |
| Entry of cooling lubricant | with cooling lubricant entry, radial | |
| Escape of cooling lubricant | with cooling lubricant exit, axially concentric | |
| Cooling lubricant | yes | |
| Holder type | iSO taper | |
| Interface coding | SKG04005x02 | |
| Holder shape | MAS BT | |
| Holder version | dimensionless nominal size without cooling | |
| Holder size, no dimensions | 40 | |
| Type of mounting | spigot | |
| Shank length | 70 mm | |
| Interface on machine side | BT 40 | |
| With flat surface contact | yes | |
| Min. clamping diameter | 0.5 mm | |
| Max. clamping diameter | 10 mm | |
| For collet type | ER collet; ER collet | |
| Gauge length | 70 mm | |
| External diameter, tool-end | 34 mm | |
| Body length (tool side) | 20.6 mm | |
| External diameter of clamping nut | 30.9 mm | |
| Min. tool clamping length | 0.5 mm | |
| Max. tool clamping length | 10 mm | |
| Max. speed | 25,000 min-1 | |
| Concentricity | 3 µm | |
| Balance quality G at rotational speed | g 2.5 at 25,000 rpm | |
| Machining strategy | HPC; HSC | |
| Vibration damping | yes | |
| Thread | M16 | |
| Incl. RFID data carrier | no | |
| With cooling channel bore | no | |
| Interface | joint 1; joint 2 | |
| Type of product | collet chucks | |
| Overall length | 135.4 mm | |
| Overall height | 34 mm | |
| Overall width | 34 mm | |
| Standard | ISO 7388-2; JIS B6339 | |
| Shape | ADB | |
| With thread | yes | |
| With hole for RFID data carrier | yes | |
| Through-coolant available | yes | |
| Material | heat-treatable steel | |
| Content | 1 pcs. |
Identification & Classification
| Article number | 302843 16 | |
| EAN / GTIN | 4045197771582 | |
| Manufacturer number | 302843 16 | |
| 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.