Specification (mm) | Flatness of working surface & parallelism of opposite surfaces | Squareness between working surfaces | Tolerance of h & w between a matched pair |
Precision grade (μm) |
00 | 0 | 00 | 0 | 00 | 0 |
160x25x16mm | 1.5 | 3 | 20 | 40 | 1.5 | 3 |
250x40x25mm | 2 | 4 | 30 | 60 | 2 | 4 |
400x63x40mm | 4 | 8 | 40 | 80 | 4 | 8 |
630x100x63mm | 6 | 12 | 50 | 100 | 6 | 12 |
◇ Alternative for blocks, used to measure the depth of parallelism of parts.
◇ Each specification has "a" and "b" type. "a" means 4 working surfaces and "b" means 2 working surfaces.
