The machinists at Cer-Mac Inc. have used 5C Collet Blocks for over 50 years. However, when a part was larger than 1 1/8 inch diameter they found they needed a 16C Collet Block.
Since they could not find a manufacturer to supply them, it was decided to design and build our own. The 16C Collet Block was designed to be simple to use and cost-effective. CMW now offers a 16C Collet Block that is either square or hexagonal and can hold up to 1 5/8 inch diameter through the collet.
The block is manufactured from 4140 aircraft quality steel and utilizes a manual open / close system using a spanner wrench. The same design is available in 17-4 stainless steel for increased environmental robustness, such as in EDM applications.