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3 Flute COMPRESSION UP DOWN Carbide End Mill

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6-6-CM-3F-22 [T2]
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If an upcut gives you a great bottom finish and a down cut a great top finish, why not have both with a compression cutter! A compression cutter starts with an up cut component usually the length of the diameter (e.g. ⅛” has a ⅛” up cut component and the rest to down cut) so get the full benefit of the cutter, your first plunge must go below that length (e.g. ⅛” or more). Compression cutters like to run a bit faster than other wood cutting bit to get the best finish along the side of your material.

These are 3 flute cutters and are the go to for furniture and cabinetry makers. Being 3 flute you need to feed at 50% faster than a 2 flute or 33% slower on your router. Do not use these bits to drill holes or start a profile cut with a straight plunge. Use a ramp in to ensure the longevity of the end mill. Best to use these on CNCs that can handle fast feed rates or else you will risk burning your bit (usual signs are blackening on the cutter tip). 

Suitable for

  • Laminate
  • Melamine Particle Board
  • Veneered Plywood
  • Softwood

Not advisable

  • Hardwoods

Adam’s Tips

Albeit compression bits are primarily used for slot cutting, you can still profile cut as long as you go past the up cut component. This will give you both a perfect bottom and top finish.

Feeds and Speeds - 3 Flute Compression
mm per minute
Item Code Description  Soft 
3.175-CM-3F-17 3.175mm x 3.175mm x 17mm  3F 6,400
3.175-CM-3F-22 3.175mm x 3.175mm x 22mm  3F 5,100
4-4-CM-3F-22 4mm x 4mm x 22mm  3F 7,950
6-6-CM-3F-22 6mm x 6mm x 22mm  3F 19,750
6-6-CM-3F-32 6mm x 6mm x 32mm  3F 12,600
8-8-CM-3F-32 8mm x 8mm x 32mm  3F 27,900
10-10-CM-3F-45 10mm x 10mm x 45mm  3F 32,300
12-12-CM-3F-35 12mm x 12mm x 35mm  3F 100,700
12-12-CM-3F-45 12mm x 12mm x 45mm  3F 64,300
12.7-12.7-CM-3F-31.75 12.7mm x 12.7mm x 31.75mm  3F 147,250
Revolutions per minute 16,000RPM  
100% width per cut slotting  
Depth per cut Diameter x 1