For those really big jobs, we have a line of Heavy Duty Expanding Collets that provide greater strength and rigidity. This collet system is designed to work with machines that have either a 16C or 3J spindle. This system works off the same principle as that of the Rovi 5C system. It still includes the rod assembly, sleeve, and machinable collet.

The difference is the larger size. Instead of a 1/4-28 screw, this system uses a 3/8 screw. In addition, the stem of the collet is much larger than the -4 collets, resulting in a more rigid setup.

Click here for 16C Exp Collets Click here for 3J Exp Collets

Need more info? Do not hesitate to contact us to go over your specific applications. 800-423-5145