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Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 250mm
| Type | Independent Chuck |
| Number of Jaws | 4 |
| Mount Type | Front Mount |
| Diameter | 250 |
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Description
The Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 250mm is a rugged, reliable workholding solution designed for precision machining. With four independent jaws, you can clamp round, square, or irregular parts by adjusting each jaw individually, delivering true concentric grip even on unconventional shapes.
Made in Poland as part of the 4304 series, this 250 mm chuck emphasizes durability and long tool life. It ships with one set of solid reversible jaws, ready to tackle demanding jobs in workshops, schools, and production environments.
- Independent jaw adjustment for irregular workpieces: Each jaw can be positioned independently, enabling precise clamping of off-center or irregular shapes without re-centering the workpiece.
- Solid reversible jaw set included: Comes with one complete jaw set that can be reversed for extended use, providing fast, reliable setup right out of the box.
- Durable cast iron construction for long tool life: Rigid, robust chuck body delivers consistent grip and longevity through heavy daily use.
This independent 4‑jaw chuck streamlines your workflow by delivering secure, repeatable clamping across a wide range of part geometries. Its front‑mount design simplifies installation, while the 250 mm size offers a versatile balance of holding power and runout control, helping you achieve accurate, repeatable results with less setup and fewer adjustments.
Part Numbers
- Protool Part Number
- 4304-250
- Brand
- Bison
- Category
- Manual Chuck
Need cutting data? Call 01732 887334 or email sales@protool-ltd.co.uk.
Delivery
Free UK mainland delivery on orders over £50 ex VAT. In-stock items ordered before 4:30pm are dispatched the same working day. Full delivery information.
Returns
14-day returns on unused stock items in original packaging. Special-order and bespoke tooling is non-returnable. Read our returns policy.
Technical Support
Over 30 years of machining experience behind the counter. Call 01732 887334, Mon–Thurs 8:30–17:30, Fri 8:30–16:30.
Trade Accounts
Credit accounts, contract pricing and scheduled call-off orders available for trade customers. Apply for an account.
What time are Protool open?
We are open Monday to Friday between 8:30am and 5pm.
Do you offer Free Next Day delivery?
Yes! We offer Free Next Day delivery via Royal Mail Tracked 24 on all orders over £50 ex VAT*. We also offer Free DPD Local Next Day delivery on all orders over £100 ex VAT*.
We also offer the following:
- Royal Mail Tracked 24 — £5.90 (FREE on orders over £50 ex VAT*). Order before 4:30pm for next day delivery. No signature required.
- DPD Local Next Day — £8.00 (FREE on orders over £100 ex VAT*). Standard next day delivery to UK mainland addresses.
- Royal Mail Special Delivery — £12.50. Guaranteed delivery before 1pm the next working day.
- DPD Saturday Delivery — £25.00. Must be ordered on Friday before 4pm. Pre-12pm delivery.
For delivery to Scottish Highlands & Islands, Northern Ireland, Republic of Ireland, or overseas locations, additional charges apply. Please see our delivery page for full details, or call us on 01732 887 334.
*T's & C's and exclusions apply. Please see our delivery page for more information on all our services.
Full Range: Bison Cast Iron Independent Chuck - 4 Jaw - 1 Piece Jaw (Front Mount) - 4304
View full collection →You are viewing 4304-250. Click any other SKU to view its full details.
| Product SKU | Type | Number of Jaws | Mount Type | Diameter | Bore | Material | Jaw Type | Price | Stock | Order |
|---|---|---|---|---|---|---|---|---|---|---|
| 4304-200 | Independent Chuck | 4 | Front Mount | 200 | 50 | Cast Iron | 1 Piece | £906.30 | 1-2 days | |
| 4304-250 Viewing | Independent Chuck | 4 | Front Mount | 250 | 65 | Cast Iron | 1 Piece | £1,123.60 | 1-2 days | |
| 4304-315 | Independent Chuck | 4 | Front Mount | 315 | 80 | Cast Iron | 1 Piece | £1,449.02 | 1-2 days | |
| 4304-400 | Independent Chuck | 4 | Front Mount | 400 | 100 | Cast Iron | 1 Piece | £2,128.48 | 1-2 days | |
| 4304-500 | Independent Chuck | 4 | Front Mount | 500 | 125 | Cast Iron | 1 Piece | £3,934.72 | 1-2 days | |
| 4304-630 | Independent Chuck | 4 | Front Mount | 630 | 160 | Cast Iron | 1 Piece | £5,080.58 | 1-2 days |
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