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Extra Long Ball Nose End Mill
*AstraHP Coated* Bits&Bits 440-SRB250 1/4" Long Reach ball nose bit
*AstraHP Coated* Bits&Bits 440-SRB250 1/4" Long Reach ball nose bit
Extra Long Ball Nose End Mill
*AstraHP Coated* Bits&Bits 440-SRB250 1/4
*AstraHP Coated* Bits&Bits 440-SRB250 1/4

1/4″ Extra-Long CNC Ball Nose Bit – 2″ Cut

$66.99

Grab 4, pay for 3. Same shank, no funny business. 😎

In stock

Designed for precision and depth, this 4″ long solid carbide ball nose end mill features a generous 2″ length of cut—perfect for deep carving and detailed 3D work. The AstraHP coating boosts tool life and performance, reducing wear even under demanding conditions. Ideal for CNC woodworkers and makers who need reach without sacrificing finish quality.

  • AstraHP Coated
  • Solid Carbide
  • Tip Diameter: 1/4″
  • Shank: 1/4″
  • Overall Length: 4″
  • Cut Length: 2″
  • Up-cut
  • Made In USA

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In stock

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  • Eligible for return within 30 days.
    Exclusions apply. See our returns policy.
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SKU: 440-SRB250 Categories: , , Brand:
More Info

What is a Ball Nose End Mill?

Ball nose end mills, also known as full radius end mills or ball mills, are cutting tools where the nose radius is equal to half of the diameter of the tool. This creates a constant single radius (or ball) at the tool end with no straight edge (sharp corners) in the profile. They are used for contour milling, shallow slotting, pocketing and contouring applications. Ball nose mills are ideal for 3D contouring because they are less prone to chipping and leave a nice rounded edge. Formerly XLB14-420C.

This data serves as a general guidance only. These are conservative speeds and feeds due to the cut length on these tools.
Soft Woods/ Hard Woods
RPM: 16,000
IPM : 30-40″
Cut depth per pass: 1/4″

  • Same-Day Shipping: Orders placed by 2:00 PM PST, Monday–Friday, ship the same day.

  • Custom Engraving Tools: Made to order and typically ship within 1–2 business days.

  • Standard U.S. Shipping: Starts at $7 and delivers in 3–10 business days.

  • Express Shipping: $10.99 with 2–3 business day delivery.

  • Next Business Day Shipping: Starts at $35.

  • International Shipping: Available via FedEx only. Rates calculated at checkout.

New, unused in-stock tools may be returned within 30 days of delivery for a full refund.
Made-to-order tools—such as custom engraving cutters—may be returned but are subject to a 25% restocking fee.

Customers are responsible for return shipping costs unless the return is due to our error (such as receiving an incorrect or defective item). After 30 days, refunds or store credit may be offered at our discretion, except for warranty-related issues. Start your return here.

Unused items may also be exchanged for other tools; shipping charges apply unless the exchange is required due to our mistake.

If your order arrives damaged, please email info@bitsbits.com