Three-jaw lathe chuck steel with recessed mount, DIN 702-4, External ⌀ A: 80mm

Article no.: 312911 80
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Product details

Technical Data

Standard DIN 702-4
Material Steel
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 7,000 min-1
Colour code for accessories HOLEX geared scroll chucks and jaws
Type of product Gear scroll chucks

Identification & Classification

Article number 312911 80
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EAN / GTIN 4062406154561
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Manufacturer number 312911 80
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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.

Optional extras:

Spare and additional jaws No. 312971312986.

Warning:

Intended use
  • 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. 312971312991.
  • 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.

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