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AstraHP Coated 440-SRF250 1/4" Extra Long Up-cut Spiral CNC Router Bits
AstraHP Coated 440-SRF250 1/4" Extra Long Up-cut Spiral CNC Router Bits
AstraHP Coated 440-SRF250 1/4" Extra Long Up-cut Spiral CNC Router Bits
AstraHP Coated 440-SRF250 1/4
AstraHP Coated 440-SRF250 1/4
AstraHP Coated 440-SRF250 1/4

*AstraHP Coated* Bits&Bits 440-SRF250 – 1/4″ Extra Long CNC Bit featuring 2″ Cut Length

$65.99

Introducing the redesigned Extra Long 1/4″ Up-Cut CNC bit, crafted for precision and performance on CNC machines. With an impressive 2″ cut length and solid carbide construction, this bit delivers exceptional durability and clean, chip-free cuts in deep routing applications. The up-cut flutes ensure efficient chip removal and smooth finishes, making it the ideal choice for cutting where precision matters. Built exclusively for CNC use, this end mill combines strength and reliability to tackle even the most demanding projects with ease.

  • AstraHP Coated
  • Solid Carbide
  • Tip Diameter: 1/4″
  • Up-Cut
  • Shank: 1/4″
  • Cut Length: 2″ (flute length)
  • Overall Length: 4″
  • Recommended RPM: 16,000
  • For CNC use only, not for hand routers.
  • Previously known as: XL14-420C
  • Made In USA
CNC-HandRouter-RouterTable

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SKU: 440-SRF250 Categories: , Tag: Brand:

When using the Extra Long 1/4″ Up-Cut End Mill, proper speeds, feeds, and cut depths are critical to achieving optimal performance and preventing breakage. Due to its 4″ overall length and the naturally brittle nature of solid carbide, this bit requires careful handling to avoid undue stress. Exceeding recommended parameters or pushing the bit too hard can lead to snapping, especially in demanding applications. Always consult your CNC’s guidelines and adjust for material type to ensure smooth, precise cuts and extend the life of your bit. Patience and precision are key to maximizing both performance and durability.

This data serves as a general guidance only and do not warrant against bit breakage. These are conservative speeds and feeds due to the cut length on these tools
Soft Woods/ Hard Woods
RPM: 16,000RPM
IPM : 50-65″
Max Cut depth per pass: 1/4″
Weight 0.1 lbs
Shank

1/4"
Cut Diameter

1/4" (.25")
Cut Length

2"
Cut Style

Up-Cut

3 reviews for *AstraHP Coated* Bits&Bits 440-SRF250 – 1/4″ Extra Long CNC Bit featuring 2″ Cut Length

  1. Terry P (verified owner) –

    Very rarely do I carve anything over 3/4 inch but I had a project that had to reach 1 1/4 inch deep the extra long LOC came through for me

  2. John Ellzey (verified owner) –

    I was concerned that this bit might not be able to carve through 2 1/2″ solid walnut and might break, so I bought two bits just in case. However, the two of them cut out six large table pedestal legs (two and half hours each) without a hitch. Of course, with router bits, there is always the danger of breakage. It this case, I was pleasantly surprised and have ordered more.

  3. Will H (verified owner) –

    needed to make holes through thick stock. Works great and arrived quickly

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New, unused in-stock tools may be returned within 30 days of delivery for a full refund. Made-to-order tools such as engraving cutters with custom tip sizes are subject to a 20% restock fee if returned. The buyer is responsible for return shipping costs unless the return is the result of our error (i.e. you received an incorrect or defective item). Beyond 30 days, we reserve the right to offer refunds or store credit at our discretion, with the exception of warranty related requests. You can also exchange any unused item for one of our other tools. You will be responsible for shipping charges on any exchanges unless in error on our part. If your order arrives damaged in any way, please email us as soon as possible at [email protected] with your order number and a photo of the condition. For more information, see our Returns and Refunds page.

For more information see our returns and refunds page..

Defective Items

We are committed to ensuring all of our products are of high quality and will replace or refund items that we determine to be defective. In the event you believe you have a defective tool, please call us or email us at [email protected]. Include your order number and as much info as you can about your setup, i.e., CNC, router, speeds and feeds, material you’re cutting, etc. In most cases of what seemed to be a defective tool, we have been able to help a customer with proper settings or techniques for efficient use.