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Onsrud 57-285 carbide downcut router bit, 1/4 inch cutter diameter

Onsrud

Onsrud 57-285 downcut routing end mill hand tool

SKU CH-Q7TB-GE5MW MPN 57-285

Solid carbide router bit with downcut spiral for clean edges in MDF and wood

  • TypeAngle, Pitch & Slope Locators
  • MaterialCarbide
  • Clean cuts on MDF and wood with downcut spiral action
  • Carbide construction resists wear for long service life
  • 1/4 inch cutter diameter suits detailed routing tasks
  • Designed for precise angle, pitch and slope location
  • Onsrud quality backed by model 57-285 specification

Precision downcut router bit

The Onsrud 57-285 is a solid carbide spiral downcut router bit built for clean-edged cuts in MDF and wood. Its downcut geometry forces chips downward to protect the top surface from tear-out. The tool is supplied new and ready for immediate use in a workshop or production environment.

Woodworkers needing splinter-free faces

This bit suits cabinetmakers, sign makers and CNC operators who require a flawless upper surface on sheet goods. It is not intended for metal, plastic composites or deep mortising where upward chip evacuation is preferred. Buyers who need a tool for non-wood materials should select a different geometry.

1/4 inch cutter diameter

The cutting diameter is 1/4 in, which fixes the minimum internal radius and determines feed-rate limits for the chosen spindle. This single dimension decides whether the bit matches the programmed tool path and the material thickness being machined.

Highlights

  • Clean cuts on MDF and wood with downcut spiral action
  • Carbide construction resists wear for long service life
  • 1/4 inch cutter diameter suits detailed routing tasks
  • Designed for precise angle, pitch and slope location
  • Onsrud quality backed by model 57-285 specification

Specifications

BrandOnsrud
Model57-285
TypeAngle, Pitch & Slope Locators
MaterialCarbide

Questions about this item

What shank diameter does the 57-285 need to fit my router collet?

The cutter diameter is 1/4 in, so the shank matches a standard 1/4 in collet.

How do I install the downcut bit so it cuts cleanly without lifting the workpiece?

Secure the material firmly, set the router to the recommended speed for MDF or wood, and feed against the rotation so the downcut spiral pushes chips downward.

When should I replace the carbide bit on the 57-285?

Replace it when the cutting edges show visible wear, chipping, or when cut quality in MDF and wood becomes rough or burnished.

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