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8mm Compression Spiral – 1/2″ Shank (AstraHP Coated)

A true-metric compression spiral built for CNC cabinet production. Designed for clean top and bottom edges in sheet goods, with a rigid 1/2″ shank and AstraHP coating for consistent performance in full-sheet, nested workflows.

8mm Compression Spiral – 1/2″ Shank (AstraHP Coated) - Main image
$65.99 $99.99 In stock

Category: Compression CNC Router Bits

This metric 8mm compression spiral is engineered for commercial cabinet shops running metric CAD/CAM programs and cutting sheet goods all day. The cut diameter is ground true to metric—no imperial rounding—so toolpaths, offsets, and part dimensions remain exact from program to part.

The compression geometry delivers clean top and bottom edges in melamine, plywood, and prefinished panels, while the 1/2″ shank provides the rigidity required for nested-based manufacturing and full-sheet passes. AstraHP coating helps manage heat and edge wear in abrasive panel materials, extending tool life and maintaining cut quality over long runs.

This is a CNC-only production tool intended for professional cabinet and furniture workflows.

• Cut Diameter: 8mm
• Shank Diameter: 1/2″
• Geometry: Compression Spiral
• Coating: AstraHP
• Application: Sheet Goods
• Machine Type: CNC Only

Made in USA

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Customer Reviews (5.0 / 5 · 5 reviews)

David ★★★★★

I swapped out an imperial bit that was never clean on the bottom edge—this AstraHP coating leaves almost zero fuzz on the melamine, and the compression cut is dead smooth on the final pass.

Abigail ★★★★★

The 8mm cut is actually true to metric, which matters when your CAD program spits out metric toolpaths and you're tired of imperial bits leaving undersized dados. Ran it through a stack of plywood and the edges came off clean on both faces. Coating seems to be holding up fine after a few sheets.

Scarlett M. ★★★★★

Ran a full sheet of melamine through this on our metric router and the edges came out clean on both faces — barely any tearout. The AstraHP coating seems to hold up better than the uncoated bits we were burning through. Nice to finally have a true 8mm that drops right into our tool holders.