KFFKFF CAT40 Hand Tools sku-18740754606 UPC 199729393040

KFFKFF CAT40 collet holder and ER spring collet chuck set, listed under Hand Tools. SKU sku-18740754606; UPC 199729393040. The 35-piece set includes 6 CAT40 SLN holders in 1/4", 3/8", 1/2", 5/8", 3/4" and 1" sizes. The ER32 and ER16 holders have a 2.76" length and are dynamically balanced. The APU holder has a 13 mm extension, and the FMB holder adjusts from 1" to 2.06".

The spring collet chucks have a stated TIR of 0.0006" / 15 μm. They are hardened and ground for concentricity and balanced for high-speed use to industrial standards. The holders and chucks are made from 40Cr and 45# alloy steel for high-speed milling, precision part machining and heavy-duty grinding; the construction is intended to limit deformation and extend service life.

The set has 10 ER16 collets in 1/32", 1/16", 3/32", 1/8", 3/16", 7/32", 1/4", 5/16", 11/32" and 3/8" sizes, plus 12 ER32 collets in 1/8", 3/16", 7/32", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16" and 3/4" sizes. Angled slots are designed to improve stability and balance. The set is compatible with standard ER spring collet chucks for cooling and tooling applications.

It includes 3 wrenches, labeled ER32, ER16A and APU13, for tightening and release, as well as 10 pull studs. Suitable uses include aerospace, automotive production, medical devices and electronics, with CNC lathes, milling machines, drilling equipment and manual tools.