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Now In: Drilling & Boring BitsSolid Carbide Drill Bits → Mortise Compression Spiral

Mortise Compression Spiral

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Application: Mortises or grooves with a perfect top surface, or through-cuts in thin double sided veneers and laminates
 
• Shorter up shear length allows bit to be used for grooves and mortises without chipping top surface.
• Also ideal for through cuts in double sided sheets that are 5/8" thick or less.
• Combination of up and down shear flutes eliminates chipping on both sides of double sided panels.
• Routs melamine, veneer plywood and other double sided materials, as well as hardwoods and softwoods.
• Use on CNC and other automatic routers as well as hand-held and table-mounted portable routers.
• Double flute spirals are for extra clean cuts at faster feed rates.
Item #
Overall
Dia.(D)
Carbide
Height(h)
Upcut
Length
Number
of Flutes
Shank
Dia.(A)
Overall
Length(H)
77-404*
3/8" 1"
1 3/8" 3"
77-408*
1/2" 7/8" 13/64" 1 1/2" 3"
77-410*
1/2" 1-3/8" 13/64" 1 1/2" 3-1/2"
77-504*
3/8" 1"
2 3/8" 3"
77-508*
1/2" 7/8" 13/64" 2 1/2" 3"
77-510*
1/2" 1-3/8" 13/64" 2 1/2" 3-1/2"
77-604*
3/8" 1"   3 3/8" 3"
77-608*
1/2" 1"   3 1/2" 3"
77-620*
1/2" 3/8"   3 1/2" 3-1/2"
77-622*
1/2" 1-1/2"   3 1/2" 3-1/2"