Straight & Spiral

High-accuracy bits designed for precise, smooth cutting in wood and CNC applications.

263 Products

3/16

3/16" Spiral Upcut Router Bit, 1/4" Shank, Carbide with Extra Long Life Coating for Wood Mortises Carving and Engraving

✅High-Quality CNC Spiral Router BitDesigned for precise and smooth down-cut grooves, slots, mortises, cycles, and dados. Produces clean edges and top surfaces, superior to straight bits. ✅Durable

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1/8

1/8" Upcut Spiral CNC Router Bits, 1/4" Shank, 3-Flute Extra Long Carbide End Mills for Wood, PVC, MDF Engraving

✅High-Precision 1/8" Upcut Spiral CNC Router Bits 3-Flute upcut router bits with 1/4" shank.Dimensions: Cutting Diameter: 1/8" (3.175mm), Cutting Length: 1-1/4" (31.75mm), Overall Length: 2-1/2" (63

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8mm Double-Edged Compound Milling Cutter Spiral Tungsten Carbide Router Bit DLC Rainbow Coated CNC Tool for Wood and Acrylic Engraving

8mm Double-Edged Compound Milling Cutter Spiral Tungsten Carbide Router Bit DLC Rainbow Coated CNC Tool for Wood and Acrylic Engraving

This double-edged spiral end mill is made of solid tungsten carbide with DLC nano-coating, offering sharp cutting edges, anti-vibration design, and smooth chip evacuation. The nano-coating ensures hig

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CNC Spiral Upcut Router Bit, 1/4

CNC Spiral Upcut Router Bit, 1/4" Shank Solid Carbide End Mill with NaCo Coating for Wood Cutting, Carving, Engraving & Joinery

This upcut spiral router bit features a 1/4" shank and solid carbide construction, enhanced with a durable NaCo nano-blue coating for excellent hardness, heat resistance, and long-lasting sharpness. T

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12mm 12.7mm Wood Flush Trim Router Bit Straight Double Flute Bearing Replaceable Carbide Inserts

12mm 12.7mm Wood Flush Trim Router Bit Straight Double Flute Bearing Replaceable Carbide Inserts

This high-performance industrial router bit is crafted from 45# steel with tungsten steel cutting edges, delivering exceptional durability and precision for woodworking. Equipped with high-quality bea

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8mm Wood Flush Trim Router Bit Straight Double Flute Bearing Replaceable Carbide Inserts

8mm Wood Flush Trim Router Bit Straight Double Flute Bearing Replaceable Carbide Inserts

This high-performance industrial router bit is crafted from 45# steel with tungsten steel cutting edges, delivering exceptional durability and precision for woodworking. Equipped with high-quality bea

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8mm Spiral Flush Trim Router Bit Up & Down Compression Cutter Spiral Grooved Bottom Double Ball Bearing Precise Cuts

8mm Spiral Flush Trim Router Bit Up & Down Compression Cutter Spiral Grooved Bottom Double Ball Bearing Precise Cuts

This high-performance spiral flush trim router bit is designed for precise, smooth, and chip-free cutting across solid wood, MDF, plywood, laminate, fiberboard, and composite panels. Its spiral groove

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160mm 1/2

160mm 1/2" Shank Lengthened Cleaning Bottom Spiral Router Bit for Engraving

Crafted from thickened tungsten steel alloy with a seamless welded handle, this spiral router bit delivers excellent strength, balance, and stability. The tungsten steel blade provides rapid, precise

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140mm 1/2

140mm 1/2" Shank Lengthened Cleaning Bottom Spiral Router Bit for Engraving

Crafted from thickened tungsten steel alloy with a seamless welded handle, this spiral router bit delivers excellent strength, balance, and stability. The tungsten steel blade provides rapid, precise

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12mm Shank Lengthened Cleaning Bottom Router Bit Spiral Engraving Machine

12mm Shank Lengthened Cleaning Bottom Router Bit Spiral Engraving Machine

Crafted from thickened tungsten steel alloy with a seamless welded handle, this spiral router bit delivers excellent strength, balance, and stability. The tungsten steel blade provides rapid, precise

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1/2

1/2" Shank Heavy Duty Spiral Double Bearing Flush Trim Bit with TiN Carbide Inserts

This industrial-grade flush trim router bit is designed for precision woodworking and CNC operations. Featuring a dual bearing design and TiN coated carbide inserts, it ensures smooth, accurate trimmi

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12mm Shank Flush Trim Router Bit CNC Wood with Replaceable Carbide Blades for wood

12mm Shank Flush Trim Router Bit CNC Wood with Replaceable Carbide Blades for wood

This high-quality flush trimming router bit is designed for professional woodworking. Equipped with brightness sharp 4-edge premium carbide blades and durable high-quality bearings, it delivers precis

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8mm Shank Flush Trim Router Bit CNC Wood with Replaceable Carbide Blades

8mm Shank Flush Trim Router Bit CNC Wood with Replaceable Carbide Blades

This high-quality flush trimming router bit is designed for professional woodworking. Equipped with brightness sharp 4-edge premium carbide blades and durable high-quality bearings, it delivers precis

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1/2″ Shank Flush Trim Router Bit CNC Wood with Replaceable Carbide Blades

1/2″ Shank Flush Trim Router Bit CNC Wood with Replaceable Carbide Blades

This high-quality flush trimming router bit is designed for professional woodworking. Equipped with brightness sharp 4-edge premium carbide blades and durable high-quality bearings, it delivers precis

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12mm Shank Heavy Duty Spiral Double Bearing Flush Trim Router Bit with TiN Carbide Inserts

12mm Shank Heavy Duty Spiral Double Bearing Flush Trim Router Bit with TiN Carbide Inserts

This industrial-grade flush trim router bit is designed for precision woodworking and CNC operations. Featuring a dual bearing design and TiN coated carbide inserts, it ensures smooth, accurate trimmi

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7pcs Straight Router Bit Set Black Grooving Milling Cutter 1/4

7pcs Straight Router Bit Set Black Grooving Milling Cutter 1/4" Shank Double Flute Dado Cutter for Woodworking

This 7-piece straight router bit set features a 1/4" shank with cutting diameters of 1/8", 5/32", 3/16", 1/4", 5/16", 3/8", and 1/2", offering cutting heights of 1/2", 3/4", 1", and 1-3/16". Precision

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1/4

1/4" Double-Edged Compound Milling Cutter Spiral Tungsten Carbide Router Bit DLC Rainbow Coated CNC Tool

This double-edged spiral end mill is made of solid tungsten carbide with DLC nano-coating, offering sharp cutting edges, anti-vibration design, and smooth chip evacuation. The nano-coating ensures hig

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6mm Double Edged Spiral Milling Cutter Tungsten Carbide Router Bit DLC Rainbow Coated CNC Engraving Tool

6mm Double Edged Spiral Milling Cutter Tungsten Carbide Router Bit DLC Rainbow Coated CNC Engraving Tool

This double-edged spiral end mill is made of solid tungsten carbide with DLC nano-coating, offering sharp cutting edges, anti-vibration design, and smooth chip evacuation. The nano-coating ensures hig

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3 Pcs 6mm Tungsten Carbide Spiral Flush Trim Router Bit Set for End Mill Cutter with Bearing for Profiling Up/Down Spinning Compound

3 Pcs 6mm Tungsten Carbide Spiral Flush Trim Router Bit Set for End Mill Cutter with Bearing for Profiling Up/Down Spinning Compound

✅High Quality Material: Made from premium cemented alloy, this milling cutter is stable, durable, and designed to deliver long-lasting cutting performance.✅Versatile Application: Provides reliable

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6mm Tungsten Carbide Spiral Flush Trim Router Bit with Bearing Up/Down Cut Compound End Mill Cutter for Profiling

6mm Tungsten Carbide Spiral Flush Trim Router Bit with Bearing Up/Down Cut Compound End Mill Cutter for Profiling

✅High Quality Material: Made from premium cemented alloy, this milling cutter is stable, durable, and designed to deliver long-lasting cutting performance.✅Versatile Application: Provides reliable

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3 Pcs 1/4'' Tungsten Carbide Spiral Flush Trim Router Bit Set for End Mill Cutter with Bearing for Profiling Up/Down Spinning Compound

3 Pcs 1/4'' Tungsten Carbide Spiral Flush Trim Router Bit Set for End Mill Cutter with Bearing for Profiling Up/Down Spinning Compound

✅High Quality Material: Made from premium cemented alloy, this milling cutter is stable, durable, and designed to deliver long-lasting cutting performance.✅Versatile Application: Provides reliabl

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1/4

1/4" Tungsten Carbide Spiral Flush Trim Router Bit with Bearing Up/Down Cut Compression Spiral End Mill Cutter for Profiling

✅High Quality Material: Made from premium cemented alloy, this milling cutter is stable, durable, and designed to deliver long-lasting cutting performance.✅Versatile Application: Provides reliable

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7/8

7/8" Cutting Dia 1/2" Shank Compression Spiral Flush Trim Router Bit with Top & Bottom Bearing For Wood Trimming Template and Pattern Work

✅Versatile DesignThis compression spiral flush trim router bit features a 1/2" shank, 7/8" cutting diameter, and both top and bottom bearings for maximum versatility. Designed for template and patte

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1/4

1/4" Shank Flush Trim Router Bit with Top and Bottom Bearings Carbide for Precision Woodworking

This flush trim router bit set features 1/4" shank bits with carbide cutting edges, designed for precise trimming, grooving, and edge finishing in a variety of woodworking projects. Ideal for use with

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Straight & Spiral

Straight and spiral router bits are precision-engineered CNC cutting tools designed for industrial woodworking and machining applications. They are widely used in routing, grooving, trimming, engraving, and high-accuracy material processing.
Manufactured from solid carbide and industrial-grade materials, these tools provide excellent hardness, heat resistance, and stable cutting performance in both high-speed CNC machining and heavy-duty applications.

Tool Engineering & Cutting Design

Straight and spiral router bits are designed with different cutting geometries to meet various machining requirements:
  • Straight Router Bits – Provide stable, clean cutting edges for slotting, grooving, and precise depth control
  • Spiral Router Bits – Feature helical cutting geometry for improved chip evacuation, reduced heat buildup, and smoother surface finish
Each design is engineered to ensure high precision, reduced vibration, and consistent machining quality.

Industrial Applications

These tools are widely used in multiple industrial sectors, including:
  • Furniture manufacturing
  • Cabinet production
  • Acrylic and plastic machining
  • Sign making and engraving
  • General CNC woodworking applications
They are suitable for both mass production environments and custom machining requirements.

Performance Advantages

Compared to standard cutting tools, straight and spiral router bits offer:
  • High precision cutting stability
  • Improved chip removal efficiency
  • Reduced burning and material damage
  • Extended tool life under continuous use
  • Compatibility with high-speed CNC systems
  • Sizes & CNC Compatibility
Straight and Spiral Router Bits are available in multiple diameters and standard shank sizes such as 1/4” and 1/2”, ensuring compatibility with most CNC routers and industrial machining systems.
Custom specifications are available for:
  • OEM / ODM production
  • Private label manufacturing
  • Bulk wholesale supply

Quality Control

  • At Carbix Tools, quality is strictly controlled at every stage of production to ensure each router bit meets industrial-grade performance standards. From raw material selection to final inspection, we maintain a consistent and traceable quality management process.
  • Each router bit undergoes multiple inspections, including dimensional accuracy, hardness testing, and cutting performance evaluation. This ensures stable quality, precise tolerances, and reliable performance in CNC woodworking and industrial applications.
  • We are committed to delivering consistent, defect-free products to our global partners. Our strict quality control system helps ensure every batch meets customer expectations for durability, sharpness, and long service life.