ROVI Products manufactures a line of internal expanding collets to fit 5C, 3J and 16C spindles, capable of holding on bores ranging anywhere from .065" to 6" in diameter. Our system is composed of three parts: a hardened and ground sleeve to insure accuracy; a rod assembly which consists of the threaded pull rod, 5C collet nut, lock nut and expanding screw, and the machineable expanding collet. Unlike other designs, our expanding collets have a taper on the shank that locks into the sleeve creating a very rigid collet which in turn gives you better concentricity. All ROVI collets are machineable and completely consumable (.0005" TIR is easily held on production runs and holding .0002 TIR is not uncommon).  ROVI collets save time, labor and cost because they can be remachined for many different jobs. When the collet has been consumed or needs to be replaced, simply remove existing collet from the sleeve and insert new collet. It is not necessary to purchase the sleeve and rod assembly for every new collet as other manufacturers may require.

The ROVI mini collet is a unique design which allows this collet to hold on bore diameters from.250" - .065". The mini collet is available in three different chucking lengths: 1/4", 9/16", and 3/4", all with a diameter of 7/16". In addition, a shoulder on the major diameter of this collet allows use of a turning ring for ease of machining.

Our heavy duty collet line for 16C and 3J spindles is capable of holding on bores of.750" - 6" in diameter.

We also manufacture special collets to your specifications. Please do not hesitate to call us with any questions you may have. ROVI has been in business since 1965 and we are very proficient in the workholding field.

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