CHICAGO-LATROBE Jobber Length Drill Bit: #51, 135° Split Point, TiCN-Coated HSS
The CHICAGO-LATROBE Jobber Length Drill Bit #51 is a NAS-Spec high-speed steel drill bit for aerospace applications, featuring a TiCN-coated HSS construction with a 135° split point per NAS 907 Type B. With a…
SKU 3G-OTH-190263
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Product Description
The CHICAGO-LATROBE Jobber Length Drill Bit #51 is a NAS-Spec high-speed steel drill bit for aerospace applications, featuring a TiCN-coated HSS construction with a 135° split point per NAS 907 Type B. With a diameter of 0.0670 inches (MPN 43721), it is designed for precision drilling in demanding industrial environments.
Frequently Asked Questions
What is the CHICAGO-LATROBE Jobber Length Drill Bit #51 used for?
This drill bit is designed for aerospace and precision industrial drilling applications. Its 135° split point reduces walking and requires less thrust, while the TiCN coating extends tool life on abrasive materials. It meets NAS 907 Type B specifications for high-reliability fastening holes.
What are the specifications of the CHICAGO-LATROBE 43721 drill bit?
The CHICAGO-LATROBE 43721 is a #51 jobber length drill bit with a 0.0670-inch diameter, 135° split point, and TiCN-coated high-speed steel. It conforms to NAS 907 Type B standards for aerospace use. The manufacturer part number is 43721.
Where to buy CHICAGO-LATROBE drill bits worldwide?
3G Electric supplies CHICAGO-LATROBE drill bits worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your facility. Contact us for availability and lead time on the 43721 or other NAS-spec tooling.
How to select the right CHICAGO-LATROBE drill bit for aerospace work?
For aerospace applications, choose a bit that meets NAS 907 Type B standards, like the CHICAGO-LATROBE 43721. The 135° split point and TiCN coating improve performance on tough alloys. Match the diameter to your fastener hole tolerance and ensure the shank fits your chuck.
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3G Electric supplies CHICAGO-LATROBE nas-spec high-speed steel 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.















