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CHICAGO-LATROBE Jobber Length Drill Bit: 21/64", 135° Split Point, Straw/Bronze Cobalt - Left-Hand Cobalt Jobber-Length Drill Bits
CHICAGO-LATROBELeft-Hand Cobalt Jobber-Length Drill Bits

CHICAGO-LATROBE Jobber Length Drill Bit: 21/64", 135° Split Point, Straw/Bronze Cobalt

The CHICAGO-LATROBE Jobber Length Drill Bit (MPN 46521) is a 21/64" left-hand cobalt jobber-length drill bit with a 135° split point and straw/bronze cobalt finish. It is designed for drilling applications requiring…

SKU 3G-OTH-251077

Brand
CHICAGO-LATROBE
Item
Jobber Length Drill Bit: 21/64", 135° Split Point, Straw/Bronze Cobalt
Category
Left-Hand Cobalt Jobber-Length Drill Bits
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Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

CHICAGO-LATROBE
Manufacturer Part Number
46521
Type
Straw/Bronze Cobalt, Left Hand
Split Point
135°

Technical Documents

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CHICAGO-LATROBE Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CHICAGO-LATROBE Jobber Length Drill Bit (MPN 46521) is a 21/64" left-hand cobalt jobber-length drill bit with a 135° split point and straw/bronze cobalt finish. It is designed for drilling applications requiring left-hand rotation, with a diameter of 0.3281 inches.

Frequently Asked Questions

What is the CHICAGO-LATROBE 46521 drill bit used for?

The CHICAGO-LATROBE 46521 is a left-hand cobalt jobber-length drill bit used for drilling into hard metals such as stainless steel and alloy steels. Its 135° split point reduces walking and improves cutting accuracy, making it ideal for maintenance, toolmaking, and production environments where reverse rotation is needed.

What are the specifications of the CHICAGO-LATROBE 46521 drill bit?

The CHICAGO-LATROBE 46521 is a jobber-length drill bit with a 21/64" diameter (0.3281 inch), 135° split point, and straw/bronze cobalt finish. It is a left-hand design, suitable for drilling in reverse rotation. The cobalt construction provides heat resistance and durability for hard-metal applications.

Where to buy CHICAGO-LATROBE 46521 drill bits worldwide?

3G Electric supplies the CHICAGO-LATROBE 46521 left-hand cobalt drill bit worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this item to any country.

How to select the correct left-hand drill bit for reverse drilling?

Select a left-hand drill bit like the CHICAGO-LATROBE 46521 when you need to drill in reverse rotation, often used to extract broken fasteners. Match the diameter (21/64") to your hole size and choose cobalt for hard metals. The 135° split point helps start the hole without a center punch.

Used in

Common applications for CHICAGO-LATROBE
Aerospace assembly — Chicago-Latrobe NAS 907 Type B aircraft-extension drill bits for drilling fastener holes in aluminum and titanium skins.
Metal fabrication — Chicago-Latrobe reduced-shank drill bit sets for enlarging holes in structural steel using magnetic drill presses.
Maintenance repair — Chicago-Latrobe left-hand cobalt jobber-length drill bits for removing broken bolts in machinery.
Tool and die making — Chicago-Latrobe jobber-length drill bit sets with 135° split point for precision hole drilling in hardened steels.
Automotive repair — Chicago-Latrobe spiral-flute screw extractors for removing seized fasteners in engine blocks or exhaust systems.
General manufacturing — Chicago-Latrobe HSS jobber-length drill bits for production drilling in mild steel and cast iron.

CHICAGO-LATROBE Products

3G Electric supplies CHICAGO-LATROBE left-hand cobalt jobber-length drill bits. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Cross-referenced by specification & description
CHICAGO-LATROBE Jobber Length Drill Bit: 23/64", 135° Split Point, Straw/Bronze Cobalt, Left Hand (MPN 46523)
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CHICAGO-LATROBE Jobber Length Drill Bit: 19/64", 135° Split Point, Straw/Bronze Cobalt, Left Hand (MPN 46519)
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CHICAGO-LATROBE Jobber Length Drill Bit: 13/32", 135° Split Point, Straw/Bronze Cobalt, Left Hand (MPN 46526)
CHICAGO-LATROBE Jobber Length Drill Bit: 11/32", 135° Split Point, Straw/Bronze Cobalt, Left Hand (MPN 46522)
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CHICAGO-LATROBE Jobber Length Drill Bit: 11/32", 135° Split Point, Straw/Bronze Cobalt, Left Hand (MPN 46522)

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