Kennametal 1878086 Cutoff Tool Block A2TZN 3/4 in Shank

Product Description

The KENNAMETAL 1878086 is an indexable cutoff blade tool block designed for parting and grooving operations on CNC lathes and manual turning centers. Built to the A2TZN style, it accepts blades with a 26 mm (1.024 inches) compatible blade height and features a 3/4 inch (19.05 mm) shank height and 3/4 inch (19.05 mm) shank width. The overall length measures 3.39 inches (86 mm) and overall height is 1.65 inches. The block is reversible, extending blade and insert life by allowing the holder to be flipped when one side wears. A licensed machinist or CNC lathe operator typically installs and services this tooling.

This tool block is suited for production turning environments where repeatable cutoff and grooving performance is required. The neutral insert cutting direction makes it appropriate for standard right-to-left parting passes on a lathe. The A2 Cut-Off series designation indicates compatibility with A2-style indexable blade systems. It is used in both job-shop and high-volume production settings on ferrous and non-ferrous workpieces where secure, rigid tool clamping is critical to part quality and surface finish.

Key Features

• Reversible design doubles effective use life of the tool block body
• Compatible blade height of 26 mm (1.024 inches) for A2-style cutoff blades
• 3/4 inch shank height and 3/4 inch shank width for standard tool post mounting
• Neutral insert cutting direction for conventional parting operations
• Overall length of 3.39 inches (86 mm) with overall width of 1.38 inches (35 mm)
• No coolant-through configuration — external coolant application applies

Compatibility

Designed for use with A2 Cut-Off series indexable blades with a compatible blade height of 26 mm. Verify blade series and height match before installation. No additional specific compatible model numbers were provided in the product data.

Installation Notes

Installation should be performed by a qualified machinist familiar with lathe tooling setup. Secure all machine power and engage the spindle lock before mounting or adjusting the tool block in the tool post. Ensure the shank seats fully and squarely in the tool holder to prevent chatter or deflection during cutoff passes. Consult the machine tool manufacturer's guidelines and applicable shop safety standards when setting tool height and overhang.