Mitutoyo offers the Surftest SJ-500 portable surface roughness tester. The tester features high accuracy, measuring straightness to 0.20 µm/50 mm; a maximum fast drive speed of 20 mm/s; and a configuration suitable for either hand-held or fixtured-in-place operation.
The tester calculates numerous form analyses such as steps, uneven steps, slope, uneven area, circle, angle and coordinate difference. There are 46 different ISO, ANSI, DIN and JIS parameters available including ISO 1302:2002. The resulting flexibility and high throughput are said to make the tester ideal for the surface roughness testing of workpieces such as piston rings, bearing races, precision molds, IC components and similar items.
According to the company, the tester uses a dedicated control unit with easy-to-read color display and a built-in, high speed thermal printer capable of printing BAC or ADC curves in landscape format, just as they appear on the display. Fine positioning is easily accomplished using a joystick control, the company says. The tester uses interchangeable nosepieces that enable either skid or skidless measurement.
The inserts include a 90-degree angle for chamfering.