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*AstraHP Coated* Bits&Bits 530-CM500SF – 1/2″ Short Flute Spiral Compression Bit – 1″LOC
$88.99
1/2″ Short Flute Compression CNC Router Bit features a .25″ up-cut flute. This allows for shallower cuts while taking full advantage of the compression cut.
- AstraHP Coated
- Solid Carbide
- Tip diameter: 1/2″ (0.5″)
- Shank: 1/2″ (0.5″)
- Length of cut: 1″
- Spiral change: 0.25″
- Overall length: 3″
- Made in USA
In stock
SKU: 530-CM500SF Categories: Spiral Router Bits, Compression CNC Router Bits, 1/2" Shank Spiral Bits, Compression Router Bit | Spiral Compression Bits Tag: AstraHP Coated
Our compression bits are designed for many different applications requiring high feed rates and compression cuts. They work well for double-sided melamine or laminated material.
These tools are coated with a proprietary high performance *Astra Coating* that allows higher speed & feed rates as well as extended tool life & increased lubricity in abrasive material.
What is a Compression Bit?
A Compression bit is a spiral bit that combines up cut and down cut action into one bit. The cutting tip pulls the fibers and chips up towards the center of the workpiece. The rest of the bit is cutting and pushing wood fibers down, also towards the center of the workpiece. This up cut down cut action is what leaves a sharp, clean edge on both edges of your workpiece. The up cut flutes on a compression spiral bit is typically equal to the diameter of the bit, for example, a 1/2" diameter has a up cut flute of 1/2". The transition point is referred to as the 'Spiral Change'. We also offer several sizes of compression bit with a shorter up cut flute length which is referred to as a short flute compression (also called a mortise style compression bit). The slow-mo video clip below was shot by none other that Jonathan Katz-Moses and shows the cutting action of the compression bit. You can clearly see the difference between the up and down cut portions of the bit.
How do I use the Compression bit correctly?
In order to properly use a compression bit to get it's full benefit, your initial cut needs to be slightly deeper than the upcut flute length, which as mentioned above is usually equal to the diameter of the bit. When used correctly, you shouldn't see any tear out or chip out on the edges. In the video above, the bit on the left is seen cutting not deep enough to pass the up cut flutes. The bit on the right is set at the correct depth.
Can you use a Compression Bit in a router?
Yes, all of our compression and spiral bits can be used in a CNC, handheld router or a router table.
| Weight | 0.26 lbs |
|---|---|
| Brand | Bits & Bits |
| Shank | 1/2" |
| Cut Diameter | 1/2" (.5") |
| Cut Length | 1" |
| Cut Style | Compression |
| Overall Length | 3" |
Speeds & Feeds
This data serves as a general guidance only.
Soft/Hard Woods/ Plywood – (Spindle Speed- RPM: 18K ) – (Feed Rate – IPM : 250-280″) – (Ramp Down: 120-140″) – (Chip Load per Tooth: 0.0077″)
MDF / Laminate / Melamine – (Spindle Speed- RPM: 18K) – (Feed Rate – IPM : 350-400″) – (Ramp Down: 150-200″) – (Chip Load per Tooth: 0.0111″)
[email protected] (verified owner) –
Works great, no tearout on box joints, astra coating is worth it.
Mj (verified owner) –
Thanks for the review! Compressions really are a great option for clean cuts…
Mike (verified owner) –
This thing is a beast! I’m hogging out about an inch deep 4”x3” pocket in hard maple, taking 0.26” deep cuts and it cuts like a hot knife through butter. I’m doing 32 of these parts at a time, so the machine is cutting for an hour and 15 minutes nonstop. No tear out, no chipping, and that’s the reason I tried this bit out. It even sounds better that it’s predecessor.
Beyond that, MJ went out of his way to make sure that I got this ASAP even though I ordered it over the holiday weekend. B&B never disappoints!
Mj (verified owner) –
Thanks for the review Mike! We work hard to improve our tools, glad to hear it’s working better than you expected!