Hertel K025319AS Straight Flute Tap M11x1.50 Metric Coarse

Product Description

The HERTEL K025319AS is a straight flute bottoming tap designed for cutting M11x1.50 Metric Coarse internal threads in blind holes and through holes where full thread depth close to the bottom of the bore is required. Manufactured from High Speed Steel with a Titanium Carbonitride (TiCN) coating, this tap offers increased surface hardness and lubricity compared to uncoated HSS tooling, extending tool life in production and maintenance tapping operations. With 4 flutes and a right-hand thread direction, the K025319AS is suited for use in vertical and horizontal machining setups. Machinists, tool and die makers, and maintenance technicians performing metric tapping work are the primary users of this tool.

This tap is appropriate for threading operations in steel, cast iron, aluminum, and similar machinable materials where M11x1.50 Metric Coarse thread forms are specified. The bottoming chamfer geometry makes it the correct choice when threads must extend to within a few pitches of a blind hole floor, typically following a taper or plug tap in a multi-tap sequence. It is also used as a single-pass tap in through-hole applications where a full thread start is not required. Coolant-through capability is not available on this tap, so flood or brush-applied cutting fluid is recommended for ferrous materials.

Key Features

• Bottoming chamfer allows threading to near the bottom of blind holes
• TiCN coating increases surface hardness and reduces friction for longer tool life
• High Speed Steel construction provides toughness across a range of workpiece materials
• 4-flute design provides good thread form accuracy and chip support in straight-flute tapping
• Right-hand thread direction matches standard M11x1.50 fastener specifications
• D5 thread limit provides controlled oversize for proper fit in tapped holes

Compatibility

Designed for cutting M11x1.50 Metric Coarse internal threads. Compatible with standard tap holders, floating tap chucks, and tapping heads configured for a 0.3230 inch shank diameter. Verify machine spindle and holder compatibility before use.

Installation Notes

Tapping should be performed by qualified machinists or maintenance technicians familiar with cutting tool setup and machine operation. Ensure the workpiece is securely fixtured and the tap is properly aligned to the drilled hole centerline before engagement to prevent tap breakage. Apply an appropriate cutting fluid for the workpiece material, as this tap does not support coolant-through delivery. Always back off the tap periodically when tapping blind holes to break and clear chips.