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Twelve carbide router bits with 1/4 shank and upcut spiral flutes

SHARPRO 1/8 Upcut Spiral CNC Router Bits 1/4 Shank 12 pack

SKU CH-ZQM3-J0WEX

A 12-pack of 1/8 upcut spiral router bits with 1/4 shank, carbide QUARK-coated for HV3000 hardness and Ra 0.03 finish, cutting woods and steels HB125-400

  • Main materialCarbide
  • Sold asUnit, 1
  • Number of items12 pack
  • Smoother cuts with surface finish under 0.03 Ra and low friction
  • Hard QUARK coating at HV3000 resists wear on tough materials
  • Tight -0.02 mm tolerance meets 100% quality checks for precision work
  • Upcut design with 178-degree edge clears chips fast in wood and steel
  • 12-piece carbide set works with common routers and CNC machines

SHARPRO 1/8 Upcut Spiral Router Bits 12 Pack

This 12-pack supplies SHARPRO 1/8-inch upcut spiral router bits with a 1/4-inch shank. Carbide construction and a QUARK coating rated at HV3000 hardness provide wear resistance for high-speed cutting. A 178-degree end cutting edge angle promotes rapid chip evacuation. The bits suit CNC machines and handheld routers from brands such as BOSCH, Dewalt and Milwaukee.

Woodworkers and metalworkers needing precision

These bits machine woods, plexiglass, plywood, MDF, cast iron and steel ranging from HB125 to HB400. A tolerance of -0.02mm and surface finish below Ra 0.03mm meet strict quality checks. Buyers who require downcut or compression geometries for different chip-flow control should consider other tool types.

QUARK coating hardness HV3000

The coating reaches HV3000 hardness while remaining thin enough to avoid influencing processing accuracy. This hardness level allows the bits to cut high-hardness materials and extends tool life during sustained high-speed machining. It is the key specification that determines suitability for abrasive or tough workpiece materials.

How it compares

Measured against everything we stock in Workshop Hardware, Springs & Clamps, at today’s prices. Recalculated every night.

Price $25.99
Pricier than about 67% of the 383 comparable items (median $17.99).

Specifications

Product
Brand nameSHARPRO
Part numberSHARPRO
Size & build
Main materialCarbide
In the box
Number of items12 pack
Environment & compliance
Certifications and standardsYes

Questions about this item

How often will the QUARK coating with HV3000 hardness need replacement when cutting steel up to HB400?

The QUARK coating at HV3000 hardness resists wear on steel up to HB400, reducing tool-change frequency compared to uncoated carbide bits.

Which limit appears first during sustained high-speed cutting — the .02 mm tolerance or the Ra .03 surface finish?

The .02 mm close tolerance is the tighter control; maintaining it under continuous load preserves the Ra .03 finish and chip evacuation at the 178-degree edge.

How much heat and cutting resistance does the 178-degree upcut edge generate during all-day CNC routing?

Friction coefficient below .1 and the 178-degree upcut design lower cutting resistance and heat, allowing sustained high-speed runs with efficient chip removal.

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