CHICAGO-LATROBE Jobber Length Drill Bit: #21, 135° Split Point, TiAlN-Coated Cobalt
The CHICAGO-LATROBE Jobber Length Drill Bit #21 is a NAS-Spec Cobalt Jobber-Length Drill Bit for Aerospace, featuring a TiAlN-Coated Cobalt construction with a 135° Split Point, NAS 907 Type J, and a 0.1590 diameter…
SKU 3G-OTH-200349
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Product Description
The CHICAGO-LATROBE Jobber Length Drill Bit #21 is a NAS-Spec Cobalt Jobber-Length Drill Bit for Aerospace, featuring a TiAlN-Coated Cobalt construction with a 135° Split Point, NAS 907 Type J, and a 0.1590 diameter. 3G Electric interprets your demand for precision tooling, sourcing this OEM part (MPN 44991) across 14 industrial departments, with specialist depth in combustion, pumps, and controls as a trust anchor.
Frequently Asked Questions
What is the CHICAGO-LATROBE Jobber Length Drill Bit #21 used for?
This TiAlN-coated cobalt drill bit is designed for aerospace applications requiring NAS 907 Type J compliance. It drills precise holes in hardened steels, stainless steels, and titanium alloys. The 135° split point reduces walking and thrust, making it suitable for CNC and manual drilling in aircraft manufacturing and maintenance.
What are the specifications of the CHICAGO-LATROBE 44991 drill bit?
The CHICAGO-LATROBE 44991 is a #21 jobber length drill bit with a 0.1590-inch diameter. It features a 135° split point, TiAlN-coated cobalt construction, and meets NAS 907 Type J specifications. This combination provides heat resistance, extended tool life, and precise hole geometry in aerospace-grade materials.
Where to buy CHICAGO-LATROBE drill bits worldwide?
3G Electric supplies CHICAGO-LATROBE drill bits worldwide. As a global industrial distributor since 1990, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead times on the 44991 and other NAS-spec tooling. We source and deliver to any international destination.
How to select the correct CHICAGO-LATROBE drill bit for aerospace work?
Select based on material and hole tolerance. For hardened steels and titanium, choose TiAlN-coated cobalt bits like the 44991 with a 135° split point. Verify the diameter (0.1590 inch for #21) and NAS 907 Type J compliance. Match the jobber length to your drilling depth. 3G Electric can advise on proper selection for your application.
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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.
