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Onsrud 63-604 carbide routing end mill up spiral O flute 1/8 1/4

Onsrud

Onsrud 63-604 Routing End Mill Up Spiral O 1/8 1/4 hand tool

SKU CH-S5EN-75ZTN MPN 63-604

Solid carbide router bit with O-flute up-spiral geometry for aluminium cutting

  • Product typeHole, Drill, Bore & Wire Gauges
  • Main materialCarbide
  • Carbide construction resists wear during routing
  • Upcut spiral clears chips from the cut
  • 1/8 inch cutter diameter suits fine detail work
  • Optimised for aluminium and similar materials
  • Onsrud 63-604 model ensures consistent quality

Solid Carbide Router Bit

The Onsrud 63-604 is a solid carbide routing end mill with an upcut O-flute spiral. It is designed for machining aluminium and similar non-ferrous materials. The 1/8 inch cutter diameter suits precision profiling and slotting tasks. This new tool serves CNC operators and fabricators who need clean chip evacuation in soft metals.

Compatibility Check

Verify that your collet or tool holder accepts a 1/4 inch shank before ordering. Confirm the spindle speed range matches carbide tooling requirements for aluminium. Ensure the machine rigidity supports the upcut geometry without excessive vibration. The California Proposition 65 notice applies to this product.

Build Integration

The upcut spiral pulls chips upward and away from the cut, freeing the flute space during deep passes. Carbide construction resists wear longer than high-speed steel in abrasive alloys. The O-flute geometry reduces welding on aluminium surfaces. This bit requires a compatible 1/4 inch shank holder and appropriate feed rates.

How it compares

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

Price $40.99
Pricier than about 68% of the 2,474 comparable items (median $23.99).

Specifications

Product
Brand nameOnsrud
Model name63-604
Product typeHole, Drill, Bore & Wire Gauges
Size & build
Main materialCarbide

Questions about this item

Does the Onsrud 63-604 router bit ship with any collets or holders?

The 63-604 is supplied as a single solid carbide router bit; collets, tool holders or wrenches are not included and must be sourced separately.

How do I decide between the 1/8 inch cutter diameter and the 1/4 inch shank on this bit?

The 1/8 inch cutting diameter determines the width of cut in aluminium, while the 1/4 inch shank must match your spindle collet size — choose this bit only if your machine accepts a 1/4 inch shank.

What does the upcut O-flute geometry do when the bit is running in a CNC router?

The upcut O-flute pulls chips upward and out of the slot, reducing recutting and heat buildup in aluminium, which helps maintain a clean edge and extends tool life.

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