SPECS - US2188BNU | 3/16" Cut Diameter | 1/4" Shank | 1/2" Cut Length | 2-1/2" Overall Length | Up Cut | 3 Flute | Solid Carbide | Spiral Ball Nose CNC Router Bit | Made in USA
Ball Nose CNC Router Bit Size Chart
| Part # | Shank Size | Cut Diameter | Cut Length | Overall Length |
| US2188BNU | 1/4 | 3/16 | 1/2 | 2-1/2 |
| US2250BNU | 1/4 | 1/4 | 3/4 | 2-1/2 |
| US5375BNU | 1/2 | 3/8 | 1 | 3 |
| US5313BNU | 1/2 | 5/16 | 1 | 3 |
| US5500BNU | 1/2 | 1/2 | 1 | 3 |
| USBNU-5PC | Set | Set | Set | Set |
Ultra-Shear 3-Flute Ball Nose CNC Router Bits
Precision & Versatility for Detailed Projects
Ultra-Shear 3-Flute Ball Nose Router Bits are designed to handle detailed CNC projects as well as table & hand router applications. The solid carbide 3-flute spiral design delivers smoother cuts, reduced chip load, lower feed resistance, and 50% more cuts per inch than standard 2-flute bits
Includes Range of Sizes for Various Applications & Needs
- 1/2", 3/8", 5/16" diameters with 1/2" shank
- 1/4", 3/16" diameters with 1/4" shank
This variety ensures that you have the right tool for any detailed project, whether you're working on a CNC, router table, or using a hand-held router.
Ideal for 3D Projects
Three-dimensional CNC projects often rely on a ball nose bit to create intricate curve profiles. The ball nose, working tangent to both inside and outside curves, delivers a finish that requires minimal sanding. The smaller the diameter, the more detail the bit can create, making these bits perfect for intricate designs.
Versatility Beyond CNC
While CNC applications are a primary use, these bits shine in hand-held routers with trammel attachments, edge guides, or template guide bushings. Ideal for creating juice grooves in cutting boards, fluted molding, dimples for marble games & pencil grooves.
Superior Performance & Precision
These bits deliver 50% more cuts per inch with reduced feed resistance and reduced chip load compared to 2-flute bits, making them perfect for achieving detailed and smooth finishes in your projects.
Proudly Made in the USA
All Ultra-Shear products, including the 3-Flute Ball Nose Bits, are made in our Strongsville, Ohio facility. We take pride in our American-made products and strive to provide the highest quality for less.
Recommended RPM
Range: 18,000 - 20,000 (max 24,000)