Bal­anced Beam Scrape
Adh­e­sion and Mar Tester

Used to per­form scrape adh­e­sion and mar resis­tance (scratch hard­ness) tests of coat­ings and sur­faces of vari­ous mate­rials. 

• For dif­fer­en­ti­at­ing the degree of adh­e­sion of coat­ings to
  sub­s­trates
• Pro­vides rel­a­tive rat­ings for a series of coated pan­els

This instru­ment con­sists of a piv­oted beam with a 45° sty­lus holder, weight post and holder for sup­port­ing the total test load mounted on one end.  On the other end of the beam is a
coun­ter­weight. A cam is rotated to lower and raise the sty­lus and a sam­ple bed mounted on ball bear­ings is used to move the test panel against the sta­tio­nary sty­lus.

Scrape Adh­e­sion Test

The sty­lus used for scrape adh­e­sion is a 1.6 mm (0.0625 inch)  drill rod, bent to a 180° loop with 6.5 mm (0.256 inch)  OD, har­d­ened, buffed and chrome plated. Sup­plied with the tester is a set of twelve slotted brass weights with stor­age rack. In the adh­e­sion test, weights are applied in 0.5 kg incre­ments to a max­i­mum of 10 kg.

Mar Resis­tance Test

By mov­ing a free edge of the test film against the nee­dle under a vari­able load expressed in grams, mar-resis­tance is deter­mined as the min­i­mum load in grams required to cut through the film to the sub­s­trate. In the mar (scratch resis­tance) test, weights can be applied in incre­ments from 10 grams to a max­i­mum of 12 kg.

Comes com­plete with:
Tester
Loop sty­lus and nee­dle sty­lus;
Weight post and holder
Weight rack and set of 12 weights:
1 x 10g; 2 x 20g; 1 x 50g; 1 x 100g; 2 x 200g; 1 x 500g; 1 x 1000g;
2 x 2000g; 1 x 5000g;
Oper­at­ing instruc­tions