CHICAGO-LATROBE Jobber Length Drill Bit: 5/16", 135° Split Point
The CHICAGO-LATROBE Jobber Length Drill Bit (MPN 47720) is a 5/16" NAS-Spec Cobalt Jobber-Length Drill Bit for Aerospace, featuring a 135° split point and Straw/Bronze Cobalt construction. With a diameter of 0.3125…
SKU 3G-OTH-200013
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Product Description
The CHICAGO-LATROBE Jobber Length Drill Bit (MPN 47720) is a 5/16" NAS-Spec Cobalt Jobber-Length Drill Bit for Aerospace, featuring a 135° split point and Straw/Bronze Cobalt construction. With a diameter of 0.3125 inches, this bit is designed for demanding aerospace applications. 3G Electric interprets customer demand and delivers this genuine industrial tool across 14 departments — and far more — with specialist depth in combustion, pumps and controls as a trust anchor, not a limit.
Frequently Asked Questions
What is the CHICAGO-LATROBE 47720 drill bit used for?
The CHICAGO-LATROBE 47720 is a NAS-spec cobalt jobber-length drill bit designed for aerospace applications. Its 135° split point reduces walking and drilling force, making it suitable for hard metals like stainless steel and titanium. The straw/bronze cobalt finish provides heat resistance and extended tool life.
What are the specifications of the CHICAGO-LATROBE 47720 drill bit?
The CHICAGO-LATROBE 47720 is a 5/16" (0.3125 inch) jobber-length drill bit with a 135° split point and straw/bronze cobalt finish. It meets NAS specifications for aerospace use. The cobalt construction enhances hardness and heat tolerance for demanding drilling tasks.
Where to buy CHICAGO-LATROBE 47720 drill bits worldwide?
3G Electric supplies the CHICAGO-LATROBE 47720 drill bit worldwide. As a global industrial distributor since 1990, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on this NAS-spec cobalt drill bit.
How to select the right CHICAGO-LATROBE jobber drill bit for aerospace work?
For aerospace drilling, choose a NAS-spec cobalt bit like the CHICAGO-LATROBE 47720 with a 135° split point to prevent walking on hard surfaces. Match the diameter (5/16") to your hole size and ensure the cobalt finish suits high-heat materials. Always use proper cutting fluid and speeds for cobalt tooling.
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3G Electric supplies CHICAGO-LATROBE nas-spec cobalt jobber-length drill bits for aerospace. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.















