KEMPF CHALKING RATE TESTER
Model 241

The Kempf Chalking Tester, Model 241, consists of a light metal cylinder equipped with a 40 mm dia. rubber stamp (Shore-hardness A 60 ± 5). A strong integral spring allows the loading of the punch with a force of between 50 to 250 N. Ring markings engraved at 50 N intervals into the stamp shaft permit the application of lower pressures than the standard load of 250 N.

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