Dry Abrasion Tester

Description

Test Method

Covers the determination of the resistance of metallic materials to scratching abrasion by means of the dry sand/rubber wheel test.

Features

• Compliant to ASTM G65
• Preset Revolution Counter
• Variable Speed
• Normal Load Calibration
• Frictional Force Measurement

Description

The Koehler K93300 Dry Abrasion Tester uses a rubber-rimmed wheel as the bed for silica abrasive that is fed from a hopper by a nozzle between the sample and the wheel. The sample is pressed into the wheel by a dead weight loaded lever. The test is run for a set number of revolutions with automatic cutoff and the wear is measured by measuring the volume of material lost through mass loss and density measurements. The flow of sand into the gap between the surfaces is controlled by the geometry of the nozzle that must be very carefully defined to obtain the required sand flow rate. The abrasive only passes through the wear interface once and is thrown away at the end of the test. The uniform loading and uniform flow of abrasive into the gap between wheel and the specimen under controlled conditions give consistent results. The properties of the rubber lining of the wheel also have a major effect on the results and need to be carefully controlled.

Included Accessories

• RPM Indicator
• Specially designed s/s nozzle
• Loading arm with lifting cam and easily changeable dead weights
• Hoppers for abrasive feed and dust collection
• Dust collection container
• Chlorobutyl rubber rimmed wheels (1 in mounted in machine and 1 given as a spare)
• Reference Materials (5 of each type):
• AISI D-2 Tool Steel (procedure A)
• AISI H-13 Die Steel (procedure B)
• AISI 4340 Steel (procedure B or E)

Additional Accessories

• K93300-1 Test Wheels, 9” diameter 
• K93300-2 Reference Specimen – AISI D-2 K93300-3 Reference Specimen – AISI H-13 K93300-4 Test Sand – AFS 50/70 (25 kg) K92800-4 Wheel Dressing Tool 
• K92800-5 Replacement Nozzle