Taps

About

A special tap is a thread-cutting tool made to a specification no catalog covers — a non-standard diameter or pitch, an unusual thread form, a reach or chamfer a stock tap cannot deliver, or a tolerance tighter than commercial classes allow. WESTport manufactures special taps to your blueprint or from a sample part across Unified, metric, ACME, pipe, STI and proprietary thread forms, in right or left hand, from High-Speed Steel, cobalt, powdered metal or carbide. We hold one of the industry's largest inventories of tap blanks, which is why our turnaround on a custom special is measured against shops that have to start from bar stock. Made in the USA and supplying precision manufacturing since 1989. The WESTport special tap line Every tap below is built to order. Send a print, a sample, or the thread callout and application, and we will quote the tool that fits it. Spiral Flute Taps. Helical flutes lift chips up and out of the hole, which is what makes them the standard answer for blind holes and interrupted holes where chip packing breaks taps. Available in slow helix (25–30°) for general blind-hole work and fast helix (45–50°) for ductile, stringy materials. Straight Flute Tandem Taps. Roughing and finishing geometry combined in a single tool, so a thread that would take two passes takes one. Straight flute construction gives maximum rigidity for through-hole and free-machining work. Spiral Flute Tandem Taps. The same one-pass roughing-and-finishing design with spiral flutes, for blind holes where you need both the cycle-time saving and reliable chip evacuation. Forming Taps. Chipless. Instead of cutting, the tap displaces material to form the thread, producing a stronger thread with a better surface finish and no chips at all — which removes the chip-evacuation problem from blind holes entirely. Best suited to ductile materials. Pipe Taps. Special NPT and NPS taps in non-standard dimensions, extended lengths, special chamfers, interrupted threads, and oversize or

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