SPI Surface Roughness Standards, Surface Finish Comparator – 30-695-1

2 to 500 Ra micro Inch Surface Finish, Nickel, Surface Finish Comparator

30 Specimens, Includes 2, 4, 8, 16, 32, 63, 125, 250 and 500 micro Inch Surface Finishes, Includes Instructions and Case

Features:

• Economy Set of 30 specimens, 7/8″ x 3/8″ electro formed, solid nickel.
• Ideal for use by draftsman, engineers, machinists, etc.
• Each type of surface finish is truly and consistently reproduced, offering a realistic idea of the feel, appearance and texture of the machined components.
• Conforms to S.A.E. and military specifications for visual and tactile inspections.
• Instructions and graph correlating inch and metric surface finish values plus ISO “N” scale included in set.
• Complete in special wallet.

Set Includes:

3 pcs. FlatLapping 2, 4 and 8 “ 3 pcs. Reaming 16, 32 and 63 “ 6 pcs. Grinding 2, 4, 8, 16, 32 and 63 “ 6 pcs. Horizontal Milling 16, 32, 63, 125, 250 & 500 “ 6 pcs. Vertical Milling 16, 32, 63, 125, 250 & 500 “ 6 pcs. Turning 16, 32, 63, 125, 250 & 500 “