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Solid carbide downcut router bit 1/8 inch diameter two flute new condition

Onsrud

Onsrud 57-244 Downcut Routing End Mill 1/8 1/2 2 hand tool

SKU CH-9FDN-21059 MPN 57-244

Downcut carbide router bit cuts MDF and wood with a 1/8 inch diameter and 1/2 inch shank

  • TypeAngle, Pitch & Slope Locators
  • MaterialCarbide
  • Downcut spiral leaves clean top edges on MDF and wood
  • Carbide construction resists wear during extended routing sessions
  • 1/8 inch cutter diameter suits detailed joinery and sign work
  • 2 inch overall length provides reach in deeper cavities
  • California Proposition 65 warning notes reproductive-harm chemical

Intended Use

The Onsrud 57-244 is a solid carbide router bit with a downcut spiral designed for MDF and wood. It suits CNC operators and woodworkers who need clean top-surface edges on sheet goods. Buyers who require an upcut spiral for chip evacuation in deep grooves or a different cutting diameter cannot use this tool.

Sustained Cutting Behaviour

The downcut geometry pushes chips downward during prolonged passes, which helps hold thin veneers flat against the spoil board. Carbide construction maintains edge integrity through repeated contact with abrasive composites such as MDF. The tool is not suited for materials that demand high chip clearance upward, such as deep aluminium slots.

Thermals Noise Power

Carbide dissipates heat efficiently during continuous routing, reducing the risk of burning on dense panels. The solid shank transmits vibration minimally when the collet is properly tightened, keeping operational noise at typical spindle levels. No external power supply or cooling system is required beyond the machine's standard spindle drive.

Highlights

  • Downcut spiral leaves clean top edges on MDF and wood
  • Carbide construction resists wear during extended routing sessions
  • 1/8 inch cutter diameter suits detailed joinery and sign work
  • 2 inch overall length provides reach in deeper cavities
  • California Proposition 65 warning notes reproductive-harm chemical

Specifications

BrandOnsrud
Model57-244
TypeAngle, Pitch & Slope Locators
MaterialCarbide

Questions about this item

How much heat does the carbide 57-244 generate during extended routing sessions?

The solid carbide construction dissipates heat efficiently when cutting MDF and wood, reducing thermal buildup during continuous downcut spiral operation.

What tool holder or collet size is required for the 1/8 inch shank on this Onsrud bit?

A 1/8 inch collet or compatible router chuck is needed to secure the 57-244's shank for proper concentricity and cutting performance.

Will the downcut spiral action on this 57-244 work cleanly with older CNC routers that have lower spindle rigidity?

The downcut geometry pushes chips downward, which can increase cutting forces; older machines with less rigid spindles may experience more vibration or deflection.

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