Starrett 40272 Bi-metal Power Hacksaw Blade 18 in 4 Tpi

Product Description

The STARRETT 40272 is a bi-metal power hacksaw blade designed for use in reciprocating power hacksaw machines. At 18 inches in length with a 4 TPI (teeth per inch) constant pitch pattern, this blade is suited for cutting through thick ferrous and non-ferrous metals, structural steel, and heavy-walled tubing. The blade measures 1-5/8 inches wide and 0.075 inches thick, providing the rigidity needed for straight, controlled cuts under machine power. The toothed edge runs a consistent pitch, making it a reliable choice for production cutting in shop or field environments. Bi-metal construction bonds a high-speed steel tooth edge to a flexible alloy steel body, balancing edge hardness with resistance to blade breakage.

This blade is used in stationary power hacksaw machines found in metal fabrication shops, plumbing and mechanical contractor shops, and industrial maintenance environments. It is installed and operated by machinists, pipefitters, millwrights, and trade professionals who need controlled, repeatable cuts on solid bar stock, pipe, structural shapes, and similar heavy stock. The 4 TPI pitch is appropriate for thicker cross-sections where a coarser tooth count clears chips efficiently and prevents tooth stripping.

Key Features

• Bi-metal construction: high-speed steel teeth bonded to a flexible alloy steel backing for extended blade life
• 18-inch blade length fits standard power hacksaw machines
• 4 TPI constant pitch pattern optimized for thick stock and heavy-walled materials
• 1-5/8 inch blade width provides lateral stability during the cutting stroke
• 0.075 inch blade thickness suited for rigid, straight cuts under machine power
• Toothed edge with consistent pitch supports steady chip evacuation

Compatibility

Designed as an OEM-style replacement blade for standard 18-inch power hacksaw machines that accept blades 1-5/8 inches wide with a 0.281-inch pinhole diameter.

Installation Notes

Power hacksaw blades are installed by machinists or qualified trade professionals. Always power down and de-energize the machine before removing or installing a blade. Verify that the pinhole diameter and blade dimensions match the machine specifications before installation. Inspect blade tension after mounting and confirm the blade tracks straight before resuming cuts.