LMT Onsrud 52-200 Series Upcut Spiral Router Bits - Clean Bottom Cuts & Superior Chip Removal

Precision and Performance: LMT Onsrud 52-200 Series Upcut Spiral Bits

The LMT Onsrud 52-200 Series is engineered for professionals who need high-quality results in demanding woodworking applications. These solid carbide upcut spiral router bits are designed specifically for CNC machines, delivering clean finishes, consistent chip evacuation, and long-lasting performance in materials like hardwood, softwood, and plywood.

Whether you're running production in a cabinet shop, routing signage, or working on custom woodwork, these bits deliver the performance edge that woodworkers and CNC operators demand.

What Is an Upcut Spiral Router Bit?

An upcut spiral bit is a type of cutting tool that uses a spiral flute pattern to pull chips upward as it cuts. This design offers several critical advantages:

• Superior chip evacuation helps reduce heat buildup.

• Cleaner bottom-edge finish because chips don’t clog the cut.

• Ideal for deep cuts and full-through passes on a CNC.

The trade-off is that it can cause minor tear-out on the top surface, which is why upcut bits are ideal when bottom edge quality matters more than the top (or when the material is supported).

Why Choose the 52-200 Series?

LMT Onsrud is a globally trusted name in industrial cutting tools, and the 52-200 Series is part of their high-performance CNC router bit lineup. This series is specifically optimized for wood routing, offering:

✅ Key Benefits:

• High Tool Rigidity: Designed from premium solid carbide for durability and vibration resistance.

• Long Tool Life: Optimized geometry resists wear over long production runs.

• Clean Finish: Delivers smooth, splinter-free bottom edges in wood and wood composites.

• Versatile Use: Great for grooving, mortising, and profiling.

• Cooler Operation: Efficient chip ejection reduces overheating and extends tool life.

Applications:

These bits are ideal for:

• CNC routing of hardwood and softwood

• Grooving and dado cuts

• Through cuts in plywood

• Cabinet making

• Furniture production

• Sign routing and engraving

If you’re running a CNC router and need fast feed rates, clean cuts, and a reliable finish on the bottom edge, the 52-200 series is an excellent fit.

Compatible Materials:

• Hardwood (maple, oak, cherry, birch)

• Softwood (pine, fir, cedar)

• Plywood (veneered or standard)

• MDF (with proper top support)

• Melamine (if used with care to prevent top chip-out)

Tips for Best Performance:

1. Secure Your Material: Use a vacuum table, clamps, or a spoilboard to avoid material shift and reduce top edge tear-out.

2. Optimize Feed & Speed: Match your feed rate and spindle RPM to the bit diameter and material type for the cleanest cut.

3. Use Dust Collection: The upcut design pairs perfectly with overhead dust systems for a cleaner workspace.

4. Check for Plunge Rating: Not all bits are plunge-rated; ramp into cuts or verify before vertical plunging.

Technical Specifications:

• Flute Type: Spiral Upcut

• Cutting Direction: Right-hand

• Material: Solid Carbide

• Series Number: 52-200

• Flute Count: Typically 2 (varies by SKU)

• Applications: Wood routing

• Machine Compatibility: CNC Routers, Table Routers (with proper collet)

When to Use the 52-200 vs. Other Styles:

• Choose upcut bits when your priority is chip evacuation and bottom edge finish.

• Choose downcut bits if you need clean top edges on laminated panels.

• Use compression bits if both top and bottom edges need to be clean (e.g., cabinet doors or visible panels).

• Q: What makes the LMT Onsrud 52-200 series different from standard bits?
  A: It’s designed specifically for CNC wood routing. The upcut spiral ensures faster chip removal, less tool heat, and cleaner bottom finishes.

• Q: Will this router bit cause chipping on plywood?
  A: Upcut bits can chip the top surface of veneered plywood. To minimize tear-out, support the surface or use masking tape on the cut line.

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  Q: Can I use this bit for MDF?
  A: Yes, but use a sharp bit and support the material, since upcut bits may cause minor top-edge chipping in MDF if not properly secured.