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Three-jaw lathe chuck cast-iron with recessed mount, DIN 702-4, External ⌀ A: 80mm
Article no.: 312906 80
Article code:
Product details
Technical Data
| Standard | DIN 702-4 | |
| Material | Cast iron | |
| External ⌀ A | 80 mm | |
| Aperture E | 16 mm | |
| Height without jaws H1 | 44 mm | |
| Height with jaws H2 | 57 mm | |
| Centring ⌀ B | 56 mm | |
| Centring depth C | 3 mm | |
| Weight | 1.5 kg | |
| maximum speed | 5,000 min-1 | |
| Colour code for accessories | HOLEX geared scroll chucks and jaws | |
| Type of product | Gear scroll chucks |
Identification & Classification
| Article number | 312906 80 | |
| EAN / GTIN | 4062406153885 | |
| Manufacturer number | 312906 80 | |
| Manufacturer | Hoffmann Supply Chain GmbH & Co. KG, Poststraße 15, 90471 Nürnberg, Germany, www.hoffmann-group.com |
Description
Version:
- Manual chucks with gear scroll, centrically clamping.
- Body made of cast iron or steel.
- Gear scroll drop-forged, balanced, and hardened.
- Flanks of scroll and of jaw serrations are ground.
- High concentricity, more precise than DIN 6386 requirement.
Application:
For machine spindles with recessed centring mount or for mounting using a flange. The chuck is secured from the rear by means of screws. The flange blanks must always be fitted first to the machine and then to the chuck.
Standard:
DIN 702-4.
Supplied with:
Includes: 1 set = 3 hardened inside jaws, stepped on the outside.
1 set = 3 hardened outside jaws, stepped on the inside.
1 clamping wrench and fastening screws or studs depending on the chuck.
1 set = 3 hardened outside jaws, stepped on the inside.
1 clamping wrench and fastening screws or studs depending on the chuck.
Optional extras:
Warning:
Intended use
Reasonably foreseeable misuse
- Manually operated lathe chuck with gear scroll.
- Centred clamping of workpieces on lathes and other suitable machine tools.
- Use only in conjunction with additional jaws article no. 312971 – 312991.
- Article no. 312906 and 312911: Recessed mount acc. to ISO 702-4.
- Article no. 312931: For spindle nose acc. to ISO 702-3 with studs and collar nuts.
- Clamp workpiece only if lathe chuck is screwed to flange or machine spindle.
- Adjust gear scroll using supplied safety clamping wrench only.
- For work in industrial environments.
- Use only when correctly assembled and with safety devices and guards on the machine fully operational.
- Use only when it is technically in good condition and safe to operate.
Reasonably foreseeable misuse
- Not for use as a toolholder, load handling attachment or hoist.
- Do not clamp square workpieces.
- Do not use if jaws or lathe chuck is cracked or otherwise damaged.
- After a collision with other objects, do not use again until a thorough check has been performed.
- Not to be struck with a hammer.
- Do not exceed the jaws’ clamping ranges.
- Do not clamp long workpieces without additional supports.
- Do not run with chuck key inserted.
- Never exceed speed engraved in clamping device.
- Do not make any unauthorised modifications.