Surface Roughness Standard 10-7524

• Made from solid electroformed nickel
• Markings in AA (microinches) and metric in Ra (micrometers)
• Each type of surface finish is truly and consistently reproduced to give the operator a realistic idea of the feel, appearance and texture of the machined component
• Conforms to S.A.E. and military specifications for visual and tactile inspection

Set contains 30 Specimens, each 7/8″ x 3/8″

• 3 Specimens Flat Lapping 2, 4 and 8″ AA
• 3 Specimens Reaming 16, 32 and 63″ AA
• 6 Specimens Grinding 2, 4, 8, 16, 32 and 63″ AA
• 6 Specimens Horizontal Milling 16, 32, 63, 125, 250 and 500″ AA
• 6 Specimens Vertical Milling 16, 32, 63, 125, 250 and 500 3 Specimens Flat Lapping 2, 4 and 8″ AA 3 Specimens Reaming 16, 32 and 63″ AA 6 Specimens Grinding 2, 4, 8, 16, 32 and 63″ AA 6 Specimens Horizontal Milling 16, 32, 63, 125, 250 and 500″ AA 6 Specimens Vertical Milling 16, 32, 63, 125, 250 and 500