Jet 708816 Spiral Knives Set of 3

Product Description

The JET 708816 is a set of three spiral knives designed as replacement cutting inserts for JET jointers and planer equipment. Spiral knife heads use multiple small carbide or hardened-steel inserts arranged in a helical pattern to shear material progressively across the width of the workpiece. This design reduces cutting noise, lowers feed resistance, and extends the interval between knife rotations compared to straight-knife heads. Woodworking professionals and skilled tradespeople install these knives during routine maintenance to restore clean, consistent cuts on surfaced lumber.

This set is suited for use in shop environments where a JET spiral cutterhead requires knife replacement. Replacing worn inserts before they chip or dull significantly extends the life of the cutterhead body and reduces tearout on figured or hardwood stock. The three-piece configuration supports a standard rotation cycle, allowing individual inserts to be indexed to a fresh edge before full replacement is needed.

Key Features

• Set of 3 spiral knife inserts for replacement or rotation service
• Designed to fit JET spiral cutterheads on jointer or planer models
• Helical arrangement reduces noise and cutting resistance compared to straight-knife heads
• Supports edge indexing to extend usable knife life before full swap-out
• OEM-sourced replacement part for accurate fitment and cutting geometry

Compatibility

Designed as an OEM replacement for JET jointer or planer models equipped with a spiral cutterhead. Confirm cutterhead model and knife seat dimensions before ordering to ensure proper fit.

Installation Notes

Installation should be performed by a qualified woodworking equipment technician or experienced shop professional. Disconnect and lock out the machine from its power source before accessing the cutterhead. Use the appropriate hex or Torx driver as specified by the cutterhead design to seat each knife insert securely and evenly. Follow the manufacturer's rotation sequence to ensure balanced cutting performance after service.

Technical Specifications

• Quantity: 3 knives per set
• Application: Spiral cutterhead replacement knives for jointers and planers

Standard Information

• Brand: JET
• Manufacturer Part Number: 708816