Kennametal S4440W 2.50in D x 17.00in L K3NW Boring Adapter

The Kennametal S4440W (MPN: 1080487, internal code K3NW) is a new, made-in-USA steel boring adapter/extension with a 2.50 in body diameter and 17.00 in overall length, designed to extend boring bars and heads deeper into bores than a standard holder alone can reach. The shank interface uses a 1/4-18 threaded mount at the cutting-head end for direct attachment of Kennametal-compatible boring heads or cartridges, while the body is finished in a black oxide treatment for corrosion resistance. The "S-44-40-W" designation decodes as follows: S = straight/cylindrical body, 44 = 4.4 in nominal shank diameter family (in Kennametal's heavy boring system), 40 = 40-series body, W = with internal coolant capability — the front face shows multiple socket-head cap screws consistent with a multi-port coolant manifold/boring head mount. This adapter is suited for deep-bore roughing and finishing operations on horizontal boring mills, machining centers, and floor borers where extended reach is required; it is sold new in original Kennametal packaging.

Product Specifications