Osg 8330085 Straight Flute Tap M8x1.25 Solid Carbide Ticn

Product Description

The OSG 8330085 is a straight flute machine tap designed for threading M8x1.25 metric coarse holes in hardened steel. It is ground from solid carbide and finished with a TiCN (titanium carbonitride) coating, giving it the hardness and wear resistance needed for difficult ferrous materials. Five flutes distribute cutting forces evenly and evacuate chips efficiently in blind or through-hole applications. The modified bottoming chamfer allows threading close to the bottom of a blind hole. With an overall length of 70 millimeters and a thread length of 22 millimeters, this tap fits standard machine tool setups. Machinists and toolroom professionals use it in CNC machining centers and production tapping operations.

This tap is suited for production and job-shop environments where hardened steel workpieces require precise metric internal threads. The M8x1.25 size is a standard metric coarse pitch used widely in automotive, aerospace, and general industrial components. Right-hand thread direction matches conventional tapping cycles on CNC and manual machines. The D3 thread limit designation indicates a tolerance class appropriate for standard metric thread fits. No coolant-through feature means it is run with external cutting fluid or appropriate tapping fluid applied at the spindle or workpiece.

Key Features

• Solid carbide construction for rigidity and wear resistance in hardened steel
• TiCN coating reduces friction and extends tool life in abrasive materials
• 5-flute design provides improved chip evacuation and surface finish
• Modified bottoming chamfer allows threading near the bottom of blind holes
• D3 thread limit for standard metric coarse thread tolerance fits
• Right-hand thread direction compatible with standard CNC tapping cycles

Compatibility

Designed for use in machine tapping applications on hardened steel workpieces requiring M8x1.25 metric coarse internal threads. Compatible with standard tapping chucks and holders accepting a 6.2-millimeter round shank with a 5-millimeter square drive.

Installation Notes

This tap is intended for use by machinists in machine tool setups such as CNC machining centers or drill presses equipped with a tapping attachment. Ensure the spindle speed and feed rate are appropriate for solid carbide tooling in hardened materials before engaging the cut. Apply adequate cutting fluid or tapping compound to the tool and workpiece to prevent premature wear. Never reverse a solid carbide tap under load without confirming the machine is set to a rigid tapping or synchronized tapping cycle, as carbide is brittle and susceptible to breakage from side loading or shock.