Gauge blocks are a system for producing precision lengths. The individual gauge block is a metal or ceramic block that has been precision ground and lapped to a specific thickness. Gauge blocks come in sets of blocks with a range of standard lengths. In use, the blocks are stacked to make up a desired length.
Metric gauge block set, 112 pcs
Another set with 8 pcs, 125 mm - 500 mm
Trolley model
36 Johansson gauge blocks wrung together easily support their own weight.
Lapping is a machining process in which two surfaces are rubbed together with an abrasive between them, by hand movement or using a machine.
Small lapping plate made of cast iron
Small lapping machine
Logitech lapping machine and retention jig
Optical flats in a wooden case