Starrett 21578 Bi-metal Bandsaw Blade 162 in 1-1/4 in 3-4 Tpi

Product Description

The STARRETT 21578 is a bi-metal welded bandsaw blade engineered for demanding metal-cutting applications in fabrication shops and industrial maintenance environments. Part of the Intenss PRO-VTH series, it measures 162 inches (13 feet 6 inches) long and 1-1/4 inches wide, with a blade thickness of 0.042 inches. The M42 high-speed steel tooth material delivers heat resistance and edge retention when cutting through steel and exotic alloys. A variable pitch of 3-4 TPI, combined with a positive rake angle and ground cutting edge, promotes efficient chip evacuation and reduces vibration during contour cuts. Licensed machinists, maintenance mechanics, and metal fabricators install this blade on industrial vertical bandsaws.

This blade is suited for contour cutting of ferrous metals, including carbon steel, alloy steel, and exotic steel grades. The raker tooth set and straight tooth form make it effective for structural shapes, plate stock, and solid bar in both production and job-shop settings. The flexible back type helps the blade conform to curved cuts without fatigue cracking during continuous operation. It ships as a single welded loop, ready to mount without additional joining.

Key Features

• M42 high-speed steel teeth for extended cutting life in hard and exotic steels
• Variable pitch 3-4 TPI reduces harmonic vibration and improves surface finish
• Positive rake angle and ground cutting edge promote aggressive, clean cuts
• Raker tooth set provides efficient chip clearance in ferrous metal cutting
• Flexible back construction supports contour cutting without premature fatigue
• Welded loop construction eliminates field joining and ensures consistent blade tension

Compatibility

Designed as an OEM-style replacement or direct-fit blade for industrial vertical bandsaws accepting a 162-inch (13 feet 6 inches) loop length and a 1-1/4-inch blade width.

Installation Notes

Blade installation should be performed by a qualified machinist or maintenance technician with the bandsaw fully de-energized and locked out per OSHA lockout/tagout procedures. Verify that blade guides, thrust bearings, and wheel tracking are properly adjusted before applying tension. Wear cut-resistant gloves when handling the coiled or uncoiled blade. Do not exceed the bandsaw manufacturer's specified blade speed for bi-metal blades cutting the intended material.