Rovi heavy duty expanding collets provide greater strength and rigidity.  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.

Rovi Collet Assembly

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3J -8 Expanding Collet Series – Machinable down to .750″
Part# Series Diameter X Length Sleeve Replacement Screw
2×2-8 -8 2″ X 2″ SL8-3J RA38-3J ES-38
2×3-8 2″ X 3″ ES-38XL
2-1/2×2-8 2-1/2″ X 2″ ES-38
2-1/2×3-8 2-1/2″ X 3″ ES-38XL
3×2-8 3″ X 2″ ES-38
3×3-8 3″ X 3″ ES-38XL
3×5-8 3″ X 5″ ES-38XXL
3-1/2×2-8 3-1/2″ X 2″ ES-38
3-1/2×3-8 3-1/2″ X 3″ ES-38XL
4×2-8 4″ X 2″ ES-38
4×3-8 4″ X 3″ ES-38XL
4-1/2×2-8 4-1/2″ X 2″ ES-38
4-1/2×3-8 4-1/2″ X 3″ ES-38XL
5-1/4×2-8 5-1/4″ X 2″ ES-38
6×2-8 6″ X 2″

For complete Collet Assembly, you must order all 3 parts:
3J Expanding Collet (of desired size), Sleeve & Rod Assembly.

Choose “Complete Assembly” Below to order all three together.

Rovi

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