The minimum rotational speeds that a flap disc must be able to withstand represent one of the most important elements in the safety requirements for coated abrasive products
EN 13743, which is mandatory for oSa members. Sundisc Abrasives has its own quality department in order to test this properly. The equipment used includes our speed testers.
The speed tester gradually increases the speed of rotation of the flap disc being tested. The standard EN 13743 states that the minimum must be 140 m/s. We test 1 ‰ of the flap discs we manufacture. If desired we add the test reports to the orders from our larger customers as an extra service.
Our flap wheels are also tested in this way. According to the standard EN 13743 speed of rotation must be 109 m/s. 1 ‰ or 1 per production batch of the produced flap wheels is currently tested.