4-WAY STEEL PARALLELS - Matched Pairs
Made of tool steel hardened to Rc 58-62 and ground in matched pairs on four sides for use where extra precision is required.
Pairs are matched in size on the width and height to a tolerance of ±0.0002" on 6, 8 and 12" lengths and 0.0003" for longer lengths.
Total parallelism, straightness over the full length and size tolerance between pieces of a matched pair is 0.0001" on 6 and 8" lengths, 0.0002 on 12" lengths and 0.0003" on longer lengths.
Adjacent ground sides are square with each other within 0.0004", except the 6 x 1/4 x 3/4, 6 x 1/4 x 3/8 and 6 x 1/4 x 1/2 sizes, which are square within 0.0005". Model No. 21039, 4-Way Steel Parallels, Pair, 6 X 1/2 X 3/4.
4-WAY STEEL PARALLELS - Matched Pairs
- Made of tool steel hardened to Rc 58-62 and ground in matched pairs on four sides for use where extra precision is required.
- Pairs are matched in size on the width and height to a tolerance of ±0.0002" on 6, 8 and 12" lengths and 0.0003" for longer lengths.
- Total parallelism, straightness over the full length and size tolerance between pieces of a matched pair is 0.0001" on 6 and 8" lengths, 0.0002 on 12" lengths and 0.0003" on longer lengths.
- Adjacent ground sides are square with each other within 0.0004", except the 6 x 1/4 x 3/4, 6 x 1/4 x 3/8 and 6 x 1/4 x 1/2 sizes, which are square within 0.0005". Model No. 21039, 4-Way Steel Parallels, Pair, 6 X 1/2 X 3/4.
