A studio product view of the Freud 03-156 single flute straight router bit, featuring a long, bright red head with a sharp silver carbide cutting edge and a polished 1/4 inch steel shank.
A technical diagram showing a cross-section of a straight groove cut into a wood block, with dimensions indicating a depth of 3/4 of an inch and a width of 5/16 of an inch.
A technical diagram illustrating a cross-section of a deep straight cut in wood, with specific dimensions labeled as 3/8 of an inch wide and 1-1/4 inches deep for the Freud 03-156 bit.
A 3D rendering of a wooden block with a clean, precise straight groove routed through the center, demonstrating the high-production cutting capability of the bit.
A technical overhead illustration of the single flute design of the Freud router bit, showing the red body and the single silver cutting edge positioned for maximum chip clearance.
A studio product view of the Freud 03-156 single flute straight router bit, featuring a long, bright red head with a sharp silver carbide cutting edge and a polished 1/4 inch steel shank.
A studio product view of the Freud 03-156 single flute straight router bit, featuring a long, bright red head with a sharp silver carbide cutting edge and a polished 1/4 inch steel shank.
A technical diagram showing a cross-section of a straight groove cut into a wood block, with dimensions indicating a depth of 3/4 of an inch and a width of 5/16 of an inch.
A technical diagram illustrating a cross-section of a deep straight cut in wood, with specific dimensions labeled as 3/8 of an inch wide and 1-1/4 inches deep for the Freud 03-156 bit.
A 3D rendering of a wooden block with a clean, precise straight groove routed through the center, demonstrating the high-production cutting capability of the bit.
A technical overhead illustration of the single flute design of the Freud router bit, showing the red body and the single silver cutting edge positioned for maximum chip clearance.
A studio product view of the Freud 03-156 single flute straight router bit, featuring a long, bright red head with a sharp silver carbide cutting edge and a polished 1/4 inch steel shank.
Freud

Freud Straight Router Bit 03-156 3/8 Inch Single Flute (1/4 Inch Shank Solid Carbide 24000 RPM High Production CNC Dado Slotting Woodworking)

Only 1 left
SKU: 03-156
$14.79 USD

Description

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Freud 03-156 3/8 Inch Single Flute Straight Router Bit

The Freud 03-156 is a 3/8-inch overall cutting diameter single-flute straight router bit engineered for high-volume dado slotting, groove routing, and rapid material clearing. Built with a 1/4-inch shank and an extended 1-1/4-inch carbide cutting height, this single-cutter solid carbide tool features an oversized chip gullet that maximizes waste evacuation at elevated feed rates. Constructed entirely from Freud Premier Solid Carbide, it operates with minimal friction and heat accumulation at rotational speeds up to 24,000 RPM across automated CNC machinery, router tables, or handheld routers in solid hardwoods, softwoods, plywood, and composites.

Best Used For:

  • High-Speed Production Dadoing & Grooving: Milling deep 3/8-inch wide straight dado channels into plywood and cabinet stock at aggressive feed rates.
  • CNC Sheet Material Clearing: Executing high-volume cutout passes and edge profiling across large timber and MDF sheets without chip clogging.
  • Deep Slotting & Mortising: Plunging and routing deep straight clearance slots using the extended 1-1/4-inch cutting edge length.

Key Performance & Safety Features

  • High-Volume Single-Flute Design: Oversized open gullet geometry delivers maximum chip clearance to support fast, continuous feed speeds.
  • Freud Premier Solid Carbide Construction: Solid micrograin carbide body maintains continuous structural rigidity and long-lasting edge sharpness under heavy thermal friction.
  • Extended 1-1/4-Inch Cutting Length: Deep carbide height allows deep single-pass or multi-step routing across thick timber panel stock.
  • Computer-Balanced Anti-Vibration Body: Precision body balancing eliminates cutter chatter to produce smooth side walls at rotational speeds up to 24,000 RPM.
  • Versatile Multi-Machine Compatibility: Optimized for high-stability operation in automatic CNC routers, handheld trim routers, and table-mounted setups.
  • Low Friction Geometry: Single cutting edge minimizes tool drag and thermal heat buildup during continuous production runs.

What's Included

  • (1) Freud 03-156 3/8" Single Flute Straight Router Bit with 1/4" Shank

Technical Specifications

Brand Manufacturer Freud® Tools
Model Part Number OEM SKU 03-156
Overall Cutting Diameter (D) 0.375 inches (3/8" / 9.5 mm)
Shank Diameter (A) 0.250 inches (1/4" / 6.4 mm)
Carbide Cutting Height (h) 1.250 inches (1-1/4" / 31.8 mm)
Overall Tool Length (H) 2.875 inches (2-7/8" / 73.0 mm)
Number of Flutes / Cutters 1 Flute (Single Flute Design)
Cutting Style Profile Straight Cutting Edge
Maximum Operating Speed 24,000 RPM
Tool Metallurgy Material Freud Premier Solid Carbide
Primary Machine Compatibility CNC Routers, Handheld Routers, Router Tables

Pro-Tip: Increase your CNC feed rate when running a single-flute bit compared to double-flute bits; single-flute bits require faster feed rates per RPM to maintain proper chip load and prevent wood burning.