Osg 1605012138 Thread Forming Tap 1/2-13 Unc Cobalt Ticn

Product Description

The OSG 1605012138 is a thread forming tap designed for producing internal threads without cutting, displacing material to create stronger, chip-free threads. Built from cobalt high-speed steel with a TiCN coating, this tap handles demanding applications across a wide range of metals. It features a modified bottoming chamfer with 2 to 2.5 chamfered threads, allowing threading close to the bottom of a blind hole. The overall length is 4.331 inches (110 mm) and the thread length is 0.768 inches. Thread limit is H8, sized for 1/2-13 UNC with a 2B class of fit and right-hand thread direction. Coolant-through design supports high-speed production environments.

This tap is suited for blind hole threading in both production shop and maintenance machining applications. It performs across a broad material range including aluminum, cast aluminum, carbon steel, alloy steel, die steel, stainless steel, hardened steel, high-nickel alloy, and titanium. The OSG EXOPRO XPF-OIL series is engineered for shops running difficult-to-tap materials where chip evacuation is a concern and thread strength is critical. Machinists and tool-and-die professionals working on precision blind-hole components will find this tap well suited to demanding tolerances.

Key Features

• Thread forming (chipless) design eliminates chip evacuation problems in blind holes
• Cobalt HSS construction provides heat and wear resistance in tough alloys
• TiCN coating reduces friction and extends tool life across abrasive materials
• Modified bottoming chamfer (2 to 2.5P) for threading near the bottom of blind holes
• Coolant-through capability supports high-speed CNC tapping cycles
• H8 thread limit for 2B class of fit in 1/2-13 UNC applications

Compatibility

Designed for blind hole threading in aluminum, cast aluminum, carbon steel, alloy steel, die steel, stainless steel, hardened steel, high-nickel alloy, and titanium. Material application codes: P, M, K, N, H. Part of the OSG EXOPRO XPF-OIL Series 16050.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which differs from standard cut-tap drill sizes — consult OSG or standard forming tap drill charts for the correct pre-drill diameter before use. Install in a rigid CNC tapping chuck or tension-compression holder rated for the required torque; avoid hand-tapping in production setups. Ensure coolant-through supply is active when using the internal coolant channel to prevent galling in stainless or high-nickel alloys. Always confirm spindle speed and feed rate match the workpiece material per the manufacturer cutting data before starting a production run.