The CMT 190.506.41 Solid Carbide Up/Downcut Spiral Bit is a premium compression router bit engineered for CNC routing applications that demand chip-free surfaces on both the top and bottom faces of the workpiece. With its 1/2 in. diameter, 1/2 in. shank, and DLCS chrome coating, this bit delivers industrial-grade performance when routing plywood, MDF, laminates, melamine, and solid wood. The simultaneous upcut and downcut spiral geometry keeps both workpiece faces clean, making it the right tool for through-cuts where tearout on either side is unacceptable.

Key Features

• Solid Carbide Construction (HWM Micrograin Carbide) - the entire bit body is manufactured from premium solid carbide rather than a carbide-tipped steel body, delivering superior wear resistance and the ability to withstand more resharpenings over the tool's service life.
• DLCS Chrome Coating - Modified Diamond-Like Carbon - DLCS is a modified diamond-like carbon coating with enhanced load-bearing capacity, engineered specifically for industrial CNC tools to extend tool life well beyond standard coatings and reduce heat buildup during aggressive cutting cycles.
• Up/Downcut Compression Geometry (2 + 2 Teeth) - the 2 upcut and 2 downcut flutes work simultaneously to shear material cleanly from both directions, eliminating fraying and splintering on top and bottom faces - critical for finished panels in plywood, melamine, and laminate applications.
• 1/2 in. Shank - the full 1/2 in. shank provides a secure, low-vibration interface with CNC router collets and router table setups, maintaining accuracy and finish quality at production feed rates.
• 1 1/8 in. Cutting Height with 15/32 in. I1 Parameter - the cutting geometry is sized to handle standard sheet goods and panel materials efficiently, giving the user the reach needed for full through-cuts in common workpiece thicknesses.
• Right-Hand (RH) Rotation - designed for standard right-hand rotation spindles found on the vast majority of CNC routers and router tables, ensuring direct compatibility without adapter requirements.
• 3 in. Total Length - the overall bit length provides the clearance needed for CNC router collet setups and tooling holders while keeping the effective cutting geometry rigid and precise.

Why This Product

• The DLCS modified diamond-like carbon coating with enhanced load-bearing capacity sets this bit apart from conventionally coated carbide spiral bits - ideal for production CNC environments where tool longevity directly affects per-part cost.
• Solid carbide construction (HWM grade) means this bit can be resharpened multiple times, offering a longer usable service life than carbide-tipped alternatives and a better return on tooling investment over time.
• The 2 + 2 upcut/downcut compression geometry makes this bit a purpose-built solution for through-cuts in double-faced panels - materials like melamine, laminate, and hardwood plywood where both surfaces must remain tearout-free in a single pass.
• With a 1/2 in. shank and right-hand rotation, this bit fits directly into standard CNC router collets without modification, making it a straightforward upgrade for shops cutting sheet goods at high feed rates.

Specifications

• Manufacturer Part Number: 190.506.41
• Brand: CMT Orange Tools
• Product Type: Solid Carbide Up/Downcut Spiral Bit
• Diameter: 1/2 in.
• Cutting Height: 1 1/8 in.
• Cutting Height (I1): 15/32 in.
• Total Length: 3 in.
• Shank: 1/2 in.
• Number of Teeth: 2 + 2
• Rotation: Right-Hand (RH)
• Blade Material: Solid Carbide (HWM)
• Coating: DLCS - Modified Diamond-Like Carbon Chrome Coating
• Macro Class: Router Cutter

Approved Applications

• CNC through-cuts in plywood and hardwood plywood panels
• CNC routing of MDF and chipboard
• Two-face finish cuts in melamine and laminated panels
• Solid hardwood and softwood routing
• Plastic panel routing
• Router table through-cuts requiring chip-free top and bottom faces

Frequently Asked Questions

What is DLCS coating and why does it matter for CNC routing?

DLCS stands for a modified diamond-like carbon coating with enhanced load-bearing capacity. According to CMT, it is engineered as the ultimate technology for industrial CNC tools. The enhanced load-bearing capacity allows the coating to withstand the high feed forces and heat generated in production CNC environments, extending tool life compared to standard coatings.

What is the difference between the I cutting height (1 1/8 in.) and the I1 cutting height (15/32 in.) on this bit?

On an up/downcut compression spiral bit, the total cutting height (1 1/8 in.) represents the full length of the fluted cutting zone. The I1 dimension (15/32 in.) represents the length of one of the directional cutting segments - in this case the shorter compression zone - which is important when matching the bit to specific workpiece thicknesses for optimal compression performance.

Is this bit compatible with a handheld router or router table, or is it designed only for CNC machines?

This bit has a 1/2 in. shank and right-hand rotation, which are standard specifications compatible with CNC routing machines, router tables, and handheld routers equipped with a 1/2 in. collet. However, the 2 + 2 tooth compression geometry and DLCS industrial coating make it particularly well suited for CNC routing applications where feed rate, surface quality on both faces, and tool longevity are priorities.

How many flutes does the CMT 190.506.41 have, and how does the flute count affect performance?

This bit features a 2 + 2 tooth configuration - 2 upcut flutes and 2 downcut flutes. The upcut flutes pull chips upward from the bottom of the cut while the downcut flutes push material downward from the top, allowing both surfaces of the workpiece to be sheared cleanly in a single pass. This geometry is specifically designed to eliminate tearout on the top and bottom faces when routing through double-faced materials such as melamine and laminated plywood.