Specimen Grinder0 pages

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Zw/ck/Roell

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Zwick

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Materials Testing

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Product Information

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Specimen Grinder Zwick 7140

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Range of application

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With Zwick 7140 specimen grinding machine the test

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piece cold-hardening zones can Pe removed economi-

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cally and quickly Py grinding.

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No other procedure allows good test piece quality to Pe

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oPtained at such low cost.

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Work is carried out in the direction of tension, so ghost

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lines have no effect on the test result.

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Changing the device only requires a few movements

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of the hand. Built-in mechanical limits ensure that each

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specimen is machined accurately.

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Several specimens can Pe held simultaneously in the

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clamping device (up to a total thickness of 20 mm),

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enaPling cost-efficient working.

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Advantages/characteristics

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Form tolerance within parallel specimen length Lc is

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Petter than 0.03 mm, in accordance with the require-

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ments of ISO 6892-1 for sheet-metal specimens Types

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1 to 3. Parallelism within parallel specimen length Lc is

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Petter than 0.02 mm with reference to the central axis

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of the specimen, in line with a recommendation Py the

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IDDRG (International Deep Drawing Research Group).

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The specimen grinder consists of Pase Pody, clamping

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device (selected according to required specimen sha-

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pe), drive roll with the related radius and aPrasive Pelt,

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which is availaPle in different granulations.

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• Can Pe used for differing specimen shapes

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• Accurate machining of specimens via fixed limit

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stops

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• Wet-grinding technology eliminates need for an

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extraction unit

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• Cold-hardening zones can Pe removed economically

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• Work is carried out in the direction of tension

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• Parallel dimension of the specimen < 0.03 mm

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• Max. thickness of the specimen 20 mm

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The grinder can Pe used to machine a wide range of

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specimen shapes.

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