Product Description
CMT 191.000.02 5-Piece Solid Carbide Upcut Spiral Bit Set from CMT delivers professional-grade spiral routing performance across a range of cutting diameters - from 3/16 in. through 1/2 in. - making it a versatile solution for CNC operators, woodworkers, and router table users who need reliable chip evacuation in deep pockets, through-cuts, and slotting applications. Built entirely from premium micrograin solid carbide and protected by CMT's signature non-stick coating, this right-hand upcut spiral set is engineered to handle hardwoods, softwoods, sheet goods, plastics, and more with consistent, repeatable results.
Key Features
- Solid Micrograin Carbide Construction - the entire bit body is manufactured from premium solid tungsten carbide, providing superior wear resistance and allowing multiple resharpenings over the tool's lifespan, delivering a lower cost-per-cut compared to carbide-tipped alternatives.
- Upcut Spiral Geometry - the upcut flute design pulls chips up and out of the cut zone, preventing chip re-cutting, reducing heat buildup, and producing a clean bottom face finish on deep pockets and through-cuts.
- 2-Flute (2 POS) Configuration - dual positive flutes balance cutting speed and surface quality, offering efficient material removal while maintaining a smooth finish on the lower face of the cut.
- Right-Hand (RH) Rotation - compatible with standard router spindles, CNC routing machines, router tables, and handheld routers without any modification or adapter required.
- CMT Orange Shield Non-Stick Coating - the proprietary coating reduces pitch and resin buildup on cutting edges, prevents overheating, and guards against corrosion, extending the usable life of each bit between sharpenings.
- 5-Piece Set with Mixed Shanks (1/4 in. and 1/2 in.) - covers the most commonly used spiral bit diameters in a single purchase, reducing the need for multiple individual bit orders and making the set practical for both light routing and heavy CNC production work.
Why This Product
- For CNC routing and deep-pocket work, the upcut spiral geometry actively evacuates chips away from the cut, reducing heat and improving cut quality - a direct advantage over straight-flute bits in demanding applications.
- With five diameters spanning 3/16 in. through 1/2 in. and two shank sizes (1/4 in. and 1/2 in.), this set equips a router table or CNC machine for the widest practical range of slotting, profiling, and through-cut tasks without purchasing bits individually.
- Solid carbide construction supports repeated resharpenings, making this set a longer-term investment than carbide-tipped spiral bits for shops that regularly maintain their tooling.
- The CMT Orange Shield non-stick coating is especially valuable when routing resin-rich woods, MDF, melamine, or plastics - materials that quickly load up uncoated bits and reduce cutting efficiency.
Specifications
- Manufacturer Part Number: 191.000.02
- Brand: CMT Orange Tools
- Product Type: Solid Carbide Upcut Spiral Bit Set
- Shank: 1/4 in. - 1/2 in.
- Number of Teeth: 2 POS
- Rotation: Right-Hand (RH)
- Blade Material: Solid Carbide (HWM)
- Quantity: 5 pieces
Approved Applications
- CNC Routing
- Through-Cuts
- Chip Evacuation Routing
- Deep Pocket Routing
- Slotting in Hardwood and Softwood
- Routing MDF, Plywood, Chipboard, Melamine, and Plastic
What's Included
- 3/16 in. diameter x 3/4 in. cutting length Upcut Spiral Bit with 1/4 in. shank
- 1/4 in. diameter x 1 in. cutting length Upcut Spiral Bit with 1/4 in. shank
- 5/16 in. diameter x 1 in. cutting length Upcut Spiral Bit with 1/2 in. shank
- 3/8 in. diameter x 1 1/4 in. cutting length Upcut Spiral Bit with 1/2 in. shank
- 1/2 in. diameter x 1 1/4 in. cutting length Upcut Spiral Bit with 1/2 in. shank
Frequently Asked Questions
What is the difference between an upcut spiral bit and a straight-flute router bit?
An upcut spiral bit has helical flutes that pull chips upward and out of the cut as the bit rotates. This active chip evacuation reduces heat buildup and prevents re-cutting of material, making upcut spirals especially effective for deep pockets, through-cuts, and dense materials like hardwood or MDF. A straight-flute bit does not evacuate chips as efficiently and can cause more heat and surface burning in deep cuts.
What shank sizes are included in this set, and which routers are compatible?
This set includes bits with both 1/4 in. and 1/2 in. shanks. The 3/16 in. and 1/4 in. diameter bits use a 1/4 in. shank, while the 5/16 in., 3/8 in., and 1/2 in. diameter bits use a 1/2 in. shank. These are compatible with CNC routing machines, router tables, and handheld routers that accept 1/4 in. or 1/2 in. collets using standard right-hand rotation.
What materials can these upcut spiral bits cut?
These solid carbide upcut spiral bits are suited for use in solid hardwood, softwood, plywood, MDF, chipboard, laminates, melamine, and plastic. The solid carbide construction and CMT Orange Shield non-stick coating help manage the pitch, resin, and heat generated when routing resin-rich or abrasive sheet materials like melamine and MDF.
Can these bits be resharpened after use?
Yes. Because these bits are manufactured entirely from solid micrograin carbide rather than carbide-tipped steel bodies, they support more resharpenings over their lifespan. This makes them a practical long-term tooling investment for production environments or shops that regularly maintain and sharpen their router bits.
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