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Solid carbide O-flute upcut router bit, quarter inch diameter

Onsrud

Onsrud 63-725 Routing End Mill Up O-Flute 1/4 hand tool

SKU CH-0QDY-VD6C3 MPN 63-725

A solid carbide router bit with an O-flute upcut spiral designed for hard plastic routing

  • Product typeAngle, Pitch & Slope Locators
  • Main materialCarbide
  • Product weight0.06
  • Solid carbide construction ensures long tool life
  • Upcut O-flute geometry clears chips efficiently in hard plastics
  • 1/4 inch cutter diameter suits precise routing tasks
  • Lightweight 0.06 lb design reduces operator fatigue
  • California Proposition 65 warning informs safe handling

Solid carbide router bit

This Onsrud 63-725 is a solid carbide router bit with a 1/4 inch cutter diameter and an O-flute upcut spiral design. It is intended for cutting hard plastic materials in routing applications. The carbide construction provides hardness and wear resistance for this specific material type. The tool weighs 0.06 units.

CNC routing in hard plastics

This bit suits CNC operators and fabricators who need an upcut spiral geometry to evacuate chips upward while routing hard plastic sheet or block. It is not suited for wood, aluminium, composite panels or any material other than hard plastic, and it cannot be used in hand-held routers that require a different shank configuration.

O-flute upcut spiral geometry

The single specification that decides fit is the O-flute upcut spiral geometry combined with a 1/4 inch cutter diameter. This geometry controls chip ejection direction and surface finish in hard plastic; if the application requires a downcut, straight flute or a different diameter, this bit will not perform correctly.

How it compares

Measured against everything we stock in Utility & Specialty Hand Tools, at today’s prices. Recalculated every night.

Price $32.99
Pricier than about 62% of the 2,474 comparable items (median $23.99).

Specifications

Product
Brand nameOnsrud
Model name63-725
Product typeAngle, Pitch & Slope Locators
Size & build
Main materialCarbide

Questions about this item

What router collet size does the 1/4 in cutter diameter require?

The 1/4 in cutter diameter fits a standard 1/4 in router collet, so the buyer must own a router with that collet size or a compatible reducer sleeve.

Will the carbide material outlast high-speed steel bits when cutting hard plastic on the same machine?

Yes, carbide stays sharp longer than high-speed steel in hard plastic, reducing bit changes on the same router.

How can I confirm the upcut O-flute is clearing chips properly during the first cut?

Watch for continuous chip ejection from the flute and a clean, fuzz-free edge on the hard plastic workpiece.

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