Spiral Flute - Semi Bottoming

Spiral Flute - Semi Bottoming

Atlas High Speed Steel (HSS) Spiral Flute - Semi Bottoming

General Purpose - Spiral Flute - Semi Bottoming - High Speed Steel

  • Optimized for relatively deep hole tapping in copper, brass, aluminum, and other soft ductile materials
  • ZrN coating offers increased speed rates and prolonged tool life
  • 52° Helix
  • Slightly longer chamfer distributes cutting over greater number of teeth for increased production
  • Can be used for plug or bottoming applications
  • Made in the USA

Speeds and Feed Info

Have a question or need help?

Call Customer Service at 908-98-ATLAS or email: Sales@atlascuttingtools.com
  • Compare SKU Vendor Size Shank Diameter Overall Length H Limit D Limit NC / NF Square Size Square Length Thread Length Number of Lube Grooves Number of Flutes Style Material Coating In Stock Price Quantity
    A55831 ACT 9/16-12 0.429 3-19/32 H3 4 High Spiral HSS Uncoated 29
    $79.29
  • A55832 ACT 9/16-18 0.429 3-19/32 H3 4 High Spiral HSS Uncoated 17
    $79.29
  • A77364 ACT 9/16-12 0.4290 3.5938" H3 4 Semi Bottom HSS ZRN Available to Order*
    $83.70
  • A77365 ACT 9/16-18 0.4290 3.5938" H3 4 Semi Bottom HSS ZRN Available to Order*
    $83.70

* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.

  • Total: items /

Adding your products to cart

View Cart Continue Shopping