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Carbide O-flute router bit, 1/4 inch cutter, straight shank

Onsrud

Onsrud 56-628 O-Flute routing end mill hand tool 1/4 1 1/4 4

SKU CH-ZTHN-F268Y MPN 56-628

Solid carbide router bit with O-flute geometry for hard and soft plastics

  • Product typeHole, Drill, Bore & Wire Gauges
  • Main materialCarbide
  • Solid carbide construction resists wear for longer tool life
  • O-Flute geometry clears chips efficiently in hard and soft plastics
  • 1/4 inch cutter diameter suits precise routing tasks
  • Straight flute design provides stable cutting performance
  • Designed for primary use in plastic materials

O-Flute Router Bit for Plastics

The Onsrud 56-628 is a solid carbide routing end mill with a straight O-flute design. It is built for cutting hard and soft plastics cleanly. The 1/4 inch cutter diameter suits precision milling tasks. This new tool arrives ready for workshop use.

Suited to Plastic Fabrication Shops

Fabricators routing acrylic, polycarbonate or similar plastics will value the O-flute geometry for chip evacuation. The carbide construction resists wear in abrasive composites. Machinists needing high-speed steel economy or metal-cutting geometry should select a different tool type.

Steady Cutting in Extended Runs

Carbide holds its edge through long production passes without the rapid dulling seen in softer tool materials. The straight flute clears chips continuously, reducing heat build-up during sustained feed rates. Consistent flute geometry keeps finish quality stable from the first cut to the last.

How it compares

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

Price $74.99
Pricier than about 81% of the 2,474 comparable items (median $23.99).

Specifications

Product
Brand nameOnsrud
Model name56-628
Product typeHole, Drill, Bore & Wire Gauges
Size & build
Main materialCarbide

Questions about this item

What router collet size is needed to hold the 1/4 in cutter diameter of this Onsrud 56-628 bit?

The bit has a 1/4 in cutter diameter, so a 1/4 in collet is required to secure it in the router.

Can this O-Flute bit be used in a handheld trim router as well as a full-size CNC machine?

Yes, the straight O-Flute design works in any router that accepts a 1/4 in shank, including handheld trim routers and CNC spindles.

How can I confirm the bit is cutting cleanly in hard and soft plastics after installation?

Check for smooth, chip-free edges and minimal melting on the workpiece; the O-Flute geometry is designed to evacuate chips efficiently in both hard and soft plastics.

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