Check out our Micro Grain Solid Carbide Spiral Compression Bit, featuring 2 flutes and built to outlast standard solid carbide bits, a claim we've tested meticulously to back up. Available in sizes from 3.175mm to 12mm with a range of cutting lengths to match.

What is Micro-Grain Solid Carbide?

Micrograin solid carbide uses carbide grains down to 0.5 to 0.8 microns, versus 2 to 5 microns in standard carbide. Finer grain means a harder edge without the usual loss in toughness, so it resists chipping and heat softening under load. Result: the edge stays sharp and accurate far longer, especially when compared to standard solid carbide bits.

These compression bits are built for CNC and router applications requiring high feed rates and clean compression cuts. They work great across wood sheet materials, giving a consistent edge on both the top and bottom of the panel.

The bit can also be used as a pocketing tool, provided the pocket is deep enough to engage both the up cut and down cut portions, which ensures a clean finish. That engagement depth varies tool to tool depending on cutting length.

• Orders placed before 2pm UK time, Monday to Friday, are dispatched the same day. Selecting next day delivery means your order will arrive within 24 hours; standard delivery typically arrives between 48–72 hours.
• Customers are responsible for return shipping unless the return is the result of our error, such as receiving an incorrect or defective item. After 60 days, refunds or store credit may be offered at our discretion.
• If your order arrives defective or not fit for purpose, email info@routerbits.co.uk and our team will take it from there.