No scrapped spindles with Indentec fixture

Citation

(2002), "No scrapped spindles with Indentec fixture", Industrial Lubrication and Tribology, Vol. 54 No. 1. https://doi.org/10.1108/ilt.2002.01854aad.007

No scrapped spindles with Indentec fixture

Keyword: Hardness testing

Indentec has designed a fixture for making hardness tests deep inside tapers such as those on toolholders in machine tools.

Exploiting the inherent ability of Indentec's nose-mounted test indenter to reach into confined spaces, the fixture ensures 100 per cent inspection without any need to section and scrap expensive spindles to check hardnesses at internal points.

It allows tests to be carried out up to 50 mm inside tapers with openings as narrow as 20 mm diameter.

The spindle is clasped in a vee block mounted on a carrier on the test table of a standard Indentec digital Rockwell testing machine. Angled to present the tapered internal surface at right angles to the nose- mounted indenter, the carrier is guided forward against a scale identifying the chosen test positions. When each test point is beneath the indenter, a Rockwell hardness test is made.

Any number of tests can be undertaken by simply indexing the carrier from test point to test point against the marked scale.

Indentec says that the very small indentations left by the tests can easily be removed from the heat-treated spindle during the finishing process.

More information from: Indentec Hardness Testing Machines Ltd, Lye Valley Industrial Estate, Bromley Street, Lye, Stourbridge, West Midlands DY9 8HX UK. Tel: +44 1384 896949.