LMT Onsrud

LMT Onsrud manufactures its cutting tools in the USA, supplying solid carbide end mills and router bits for CNC routing and milling. This line is built around aerospace, composites, plastics, woodworking, and metalworking applications, where consistent geometry and tight tolerances matter as much as raw cutting speed.


For composite and wood-composite work, Onsrud's compression-style bits cut from both directions at once: the upward-spiraling lower flutes and downward-spiraling upper flutes press fibers inward from the top and bottom surfaces simultaneously, which is what keeps edges clean and chip-free on materials that would otherwise tear out under a standard up-cut or down-cut bit.


Because the tooling is engineered for high-speed production environments, it's a common choice in shops running long unattended cycles, where tool life and predictable wear matter as much as any single cut. It covers everyday routing and milling work just as well as specialty production runs.

Onsrud 62-700 Series: Solid Carbide Downcut Spiral O Flute Router Bit, SOFT PLASTIC - CNC Router Store
Onsrud 62-700 Series: Solid Carbide Downcut Spiral O Flute Router Bit, SOFT PLASTIC - CNC Router Store
Onsrud 62-700 Series: Solid Carbide Downcut Spiral O Flute Router Bit, SOFT - specifications

Onsrud 62-700 Series: Solid Carbide Downcut Spiral O Flute Router Bit, SOFT PLASTIC

$82.14

SKU: 62-762 LMT Onsrud

Only 15 left!

Onsrud 62-700 Series: Solid Carbide Downcut Spiral O Flute Router Bit – CNC Router Bits
Engineered for demanding CNC routing tasks, the Onsrud 62-700 Series Solid Carbide Downcut Spiral O Flute Router Bit delivers exceptional performance when working with soft plastics and select composite materials. This premium router bit prioritizes both precision and efficiency, ensuring smooth, clean cuts while maintaining optimal material integrity.

  • Compatible with spindle speeds up to 60,000 RPM
  • Available cutting edge diameters: 1/4" and 1/8"
  • Specialized for soft plastics, acrylic, PVC, nylon, and solid surface materials
  • Downward chip removal for clean cutting paths and reduced rework
  • Flute geometry designed for a superior smooth finish in hard plastics

Compared to standard router bits or earlier Onsrud models, the 62-700 Series provides a notable upgrade in both operational speed and finish quality. While many router bits can struggle with melting or burring soft plastics, this series stands out with its balanced design that enables high-speed operation without sacrificing surface smoothness. Its downcut spiral O flute geometry outperforms straight bits by efficiently channeling chips away from the cut zone and minimizing edge chipping. Users transitioning from other carbide or steel tools will notice a significant reduction in sanding or secondary finishing work, especially on sensitive materials like acrylic or nylon.

Key Technical Advantages:

  • High-Speed Balance: The tool is balanced by design, supporting spindle speeds up to 60,000 RPM. This enables faster cycle times and better productivity in advanced CNC systems.
  • Versatile Cutting Diameters: With both 1/4" and 1/8" options, it accommodates a variety of project requirements, from delicate inlays to broader cuts.
  • Downcut Action: The specialized downcut flute rapidly removes chips downward, preserving surface integrity and reducing airborne debris or mess on the work surface.
  • Material Specialization: Unlike multipurpose bits, this model is optimized for soft plastics and common CNC plastics such as acrylic, PVC, solid surface, and nylon, ensuring consistent results on these challenging materials.
  • Superior Finish: The geometry of the O flute is designed specifically to leave a smooth, almost polished edge even on hard plastics, reducing or eliminating the need for post-processing.

Technology and Performance
The Onsrud 62-700 Series capitalizes on advanced carbide manufacturing and proprietary flute design, making it a leading choice for professional CNC routers and hobbyists seeking premium results. Whether you’re fabricating signage, machining enclosures, or crafting prototypes, this bit offers an optimal combination of speed, reliability, and finish quality that meets or exceeds industry standards for soft and hard plastics alike.