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*AstraHP Coated* Bits&Bits 425-SRB250 – 1/4″ Up-Cut Ball Nose Spiral Bit
$35.99
Used for milling rounded slots, slopes and machining 2D/3D dimensional contours with a smooth finish.
- AstraHP Coated
- Solid Carbide
- Tip diameter: 1/4″ (0.25″)
- Shank Diameter: 1/4″
- Length of cut: 1″
- Overall Length: 2-1/2″
- Previously SRB4-250UP
- Made In USA
In stock
Solid Carbide 2 Flute 1/4″ Ball Nose Router Bit.
Used for milling rounded slots, slopes and machining 2D/3D dimensional contours with a smooth finish. Great for milling into all types of material including, wood, plastic, metal etc.
These tools are coated with a proprietary high performance *Astra coating* that allows higher speed & feed rates as well as extended tool life & increased lubricity in abrasive material.
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.
Tip: Use a Roughing end mill first to remove large areas of material then proceed with a ball nose end mill.
Made in the USA by Bits & Bits.
| Weight | 0.07 lbs |
|---|---|
| Brand | Bits & Bits |
| Shank | 1/4" |
| Cut Diameter | 1/4" (.25") |
| Cut Length | 1" |
| Cut Style | Up Cut |
| Overall Length | 2-1/2" |
Speeds & Feeds
This data serves as a general guidance only.
Soft/Hard Woods/ MDF – Spindle Speed- RPM: 16-18KÂ – Feed Rate – IPM : 180-280″
Plastics / Aluminum – Spindle Speed- RPM: 16-18KÂ – Feed Rate – IPM : 120-200″
Max Cut depth per pass 1/4″
1 review for *AstraHP Coated* Bits&Bits 425-SRB250 – 1/4″ Up-Cut Ball Nose Spiral Bit
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Geek Made Designs –
We have been using Bit & Bits tools for about a year now and its about all we use now. We have a small business making mostly wood products and couldn’t be happier with the finish we get with these tools as well as the great customer service. We primarily use the 1/4 ball, 1/4 flat down-cut and the new 1/4 cove nose on our Avid CNC and Bantam machine and could not be happier.
Mj –
Garin, Thanks for your review and we enjoy seeing the designs you’re coming up with!