Balax 40022-010 Spiral Flute Tap 4-40 Unc Modified Bottoming

Product Description

The BALAX 40022-010 is a spiral flute tap designed for blind hole threading in a wide range of metals. Built from M42 powdered metal with a bright, uncoated finish, it cuts a 4-40 UNC right-hand thread with a modified bottoming chamfer. The 2-flute, fast-flute-style design with a 45-degree helix angle pulls chips up and out of the hole, reducing the risk of chip packing in blind bores. The tap carries an H2 thread limit and suits both 2B and 3B class of fit applications. Overall length is 1-7/8 inches, with a thread length of 0.56 inches, making it a compact tool for small-diameter tapping work.

This tap is suited for use in blind hole applications across a broad range of workpiece materials including aluminum, brass, bronze, carbon steel, copper, magnesium, stainless steel, wrought aluminum alloy, and zinc. It fits standard machine tapping setups in production, maintenance, and repair environments. Machinists, tool-and-die makers, and maintenance technicians working with small UNC fastener patterns will find this tap appropriate for both hand and machine tapping operations where a close thread fit is required.

Key Features

• Modified bottoming chamfer allows threading close to the bottom of blind holes
• 45-degree right-hand helix evacuates chips efficiently in blind bore applications
• M42 powdered metal construction provides wear resistance across a broad material range
• H2 thread limit with 2B/3B class of fit for standard UNC precision requirements
• Fast flute style supports higher cutting speeds in compatible setups
• Bright, uncoated finish suitable for use with cutting fluids across most common workpiece metals

Compatibility

Designed for blind hole threading of 4-40 UNC threads in aluminum, brass, bronze, carbon steel, copper, magnesium, stainless steel, wrought aluminum alloy, and zinc. Part of the BALAX BX200 series.

Installation Notes

This tap is installed by machinists or maintenance technicians using standard tapping chucks or tap wrenches rated for the tool shank diameter. Always apply an appropriate cutting fluid for the workpiece material before tapping. Ensure the workpiece is securely fixtured and the tap is aligned axially with the drilled hole before engaging the cut. For machine tapping, verify spindle speed and feed rate are appropriate for the material and tap size before starting the operation.