If you're tackling detailed metalworking projects, the SM-4 carbide burr is a solid choice to add to your toolkit. It’s designed to slice through tough metals smoothly, letting you shape and finish with ease.
This tapered M Series burr sports a precise 28-degree angle for effective cutting, whether you prefer a standard or double cut. Perfect for professionals working with cast iron, steel, copper, or brass alloys.
With a 3/8 inch head diameter and a convenient 1/4 inch shank, this burr offers the balance of power and control you need. and if you like a longer tool, there’s even a 6-inch length option to fit different grinders.
Key Features
M Series Taper Cone Shape with 28° cutting angle for precision work
Available in Single Cut or Double Cut options depending on finish needs
Standard Cut ideal for rapid stock removal and smooth surface finishes
Double Cut offers super smooth finishes and enhanced control
3/8 inch head diameter balances cutting area and maneuverability
1/4 inch shank diameter compatible with most grinders
Length of cut is 5/8 inch for detailed work
Also available in a longer 6-inch length for extended reach
Right-hand spiral flute for consistent cutting action
Works well on cast iron, steel, copper, and brass alloys
Specifications
Shape / Type – M Series Taper Cone Shape
Cut Type – Standard Cut or Double Cut
Head Diameter – 3/8 inch
Shank Diameter – 1/4 inch
Overall Length – 2 inches (option for 6 inches)
Material Compatibility – Cast Iron, Steel, Copper, Brass Alloys
Brand / Manufacturer – Burrs4Less
Made In – USA
SKU / Part Number – 107-26144
Frequently Asked Questions
Q: What materials is the SM-4 burr compatible with?
A: It works well on cast iron, steel, copper, and brass alloys.
Q: What is the difference between single cut and double cut?
A: Single cut has a right hand spiral flute for general rapid stock removal; double cut combines right and left flutes for smoother finishes and better control.
Q: What is the shank diameter of this burr?
A: The shank diameter is 1/4 inch, fitting most grinders with matching collets.
Q: Is there more than one length option available?
A: Yes, the standard length is 2 inches, with a 6-inch length available as an option.
Q: Can this burr be used on non-ferrous metals?
A: Absolutely. It's suitable for copper and brass alloys as well as ferrous metals.
Q: What type of cut is best for smooth finishes?
A: The double cut variant produces superior smooth finishes and excellent control.
Q: How sharp is the cutting angle on the SM-4 burr?
A: It has a 28-degree taper angle designed for efficient material removal and shaping.
Q: What is the head diameter of this burr?
A: The head diameter measures 3/8 inch, ideal for precise detail work.
Q: How do I know when it’s time to Replace or Resharpen the burr?
Replace or Resharpen it when you notice decreased cutting efficiency or visible wear on the cutting edges.
Why Choose Carbide Burrs Direct?
Discover top reasons to pick our carbide burrs for your projects. Factory-direct quality at wholesale prices.
High Heat Resistance
Solid carbide construction maintains hardness even at high operating temperatures.
Maximum Durability
Solid piece construction ensures heat resistance and minimal breakage.
Affordable Pricing
Wholesale rates from USA manufacturer, high performance.
Industrial Heritage
Decades of experience supplying tools to the aerospace and automotive sectors.
