10pcs MechX 2-Flute Ball Nose Spiral End Mill - 3.175mm Shank CNC Router Bits

Specifications

• Bit Type: 2-Flute Ball Nose Spiral Bit

• Shank Diameter: 3.175mm

• Cutting Edge Diameter: 3.175mm

• Cutting Edge Length (CEL): 17.0mm

• Overall Length (OAL): 38mm

• Quantity: 10 pieces per set

• Material Compatibility: Wood, MDF, Acrylic, PVC, ABS, Nylon, Resin

Key Applications and Projects

• 3D Carving: Producing intricate relief sculptures and rounded decorative elements in hardwood or furniture pieces.

• Molding and Casting: Creating smooth-walled molds for resins or soft metals by utilizing the rounded tip for internal radii.

• Sign Making: Carving 3D lettering and rounded logos in plastics or composite boards for a professional, high-end look.

Unlock New Capabilities (Project Evolution)

• Finishing Upgrade: Transition from standard flat end mills to these ball nose bits for your final finishing pass to drastically reduce the amount of manual sanding required on 3D surfaces.

• Detail Upgrade: Utilize the 17mm cutting length to perform deep contouring operations that smaller bits cannot reach, allowing for more ambitious vertical designs.

Package Includes:

• 10 x MechX 2-Flute Ball Nose Spiral End Mills (3.175mm x 17mm)

• 1 x Protective Plastic Storage Case

FREQUENTLY ASKED QUESTIONS (FAQ)

1. What is a ball nose bit used for? It is primarily used for 3D contouring and finishing passes where a rounded surface or internal radius is required.

2. Can I use these for flat-bottom pocketing? While they can pocket, the bottom will be rounded; use a flat end mill for perfectly flat-bottomed holes.

3. Will these fit a standard 1/8" collet? Yes, the 3.175mm shank is exactly 1/8", making it compatible with most desktop CNC routers.

4. What does "2-flute" mean? It means the bit has two cutting edges, which provides a good balance between chip clearance and tool strength.

5. What is the maximum cutting depth? The cutting edge length (CEL) is 17mm, which is the maximum depth you can cut in a single pass (though multiple shallower passes are recommended).

6. Can these bits cut aluminum? They are optimized for wood and plastics, but can cut soft non-ferrous metals like aluminum with proper speeds and feeds.

7. Why is it called a spiral bit? The flutes are twisted like a drill bit to help pull chips up and out of the cut, preventing clogs and heat buildup.

8. Are these made of Carbide? Yes, industrial-grade CNC bits like these are typically manufactured from solid tungsten carbide for durability.

9. How many bits come in the pack? This is a bulk set containing 10 individual bits.

10. Do I need to sand the workpiece after using these? If used for a finishing pass with a small stepover, the surface will be extremely smooth, requiring minimal to no sanding.

11. What is the total length of the bit? The overall length is 38mm.

12. Can I use these in a handheld router? Yes, if your handheld router has a 1/8" collet, though they are specifically optimized for the stability of a CNC machine.

13. How do I prevent the bit from breaking? Ensure your feed rates are not too aggressive and use a proper "stepdown" depth for the material you are cutting.

14. What is "stepover"? In 3D carving, it’s the distance the bit moves between passes; smaller stepovers result in smoother finishes with ball nose bits.

15. Are they suitable for MDF? Yes, they provide excellent results in MDF and other composite wood products.

16. Do they come in a case? Yes, the 10pcs set usually includes a protective plastic case to keep the cutting edges sharp.

17. What is the "CEL" measurement? It stands for Cutting Edge Length, which is 17mm for this specific model.

18. Is the shank diameter the same as the cutting diameter? Yes, both are 3.175mm on this specific bit.

19. How fast should I run my spindle? Spindle speed depends on the material; typically 18,000–24,000 RPM is used for wood and plastics.

20. Can I use these for engraving? Yes, they are excellent for bold, rounded 3D engraving, though V-bits are better for fine-line text.