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CLEVELAND Jobber Length Drill Bit: Letter T, 135° Split Point, Black Oxide Cobalt - Short-Flute Cobalt Jobber-Length Drill Bits
CLEVELANDShort-Flute Cobalt Jobber-Length Drill Bits

CLEVELAND Jobber Length Drill Bit: Letter T, 135° Split Point, Black Oxide Cobalt

The CLEVELAND Jobber Length Drill Bit (Letter T, MPN C15978) is a short-flute cobalt drill bit with a 135° split point, black oxide finish, and fast spiral geometry. It features a 0.3580-inch diameter, designed for…

SKU 3G-OTH-213670

Brand
CLEVELAND
Item
Jobber Length Drill Bit: Letter T, 135° Split Point, Black Oxide Cobalt
Category
Short-Flute Cobalt Jobber-Length Drill Bits
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Technical Specifications

CLEVELAND
Manufacturer Part Number
C15978
Type
Black Oxide Cobalt, Fast Spiral
Split Point
135°
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CLEVELAND Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The CLEVELAND Jobber Length Drill Bit (Letter T, MPN C15978) is a short-flute cobalt drill bit with a 135° split point, black oxide finish, and fast spiral geometry. It features a 0.3580-inch diameter, designed for efficient chip evacuation in industrial drilling applications.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the CLEVELAND C15978 jobber length drill bit used for?

The CLEVELAND C15978 jobber length drill bit is used for drilling precise holes in hard materials like stainless steel and alloy steels. Its 135° split point reduces walking and requires less thrust, making it ideal for production machining and maintenance applications across industrial sectors.

What are the specifications of the CLEVELAND C15978 drill bit?

The CLEVELAND C15978 is a letter T jobber length drill bit with a 0.3580 inch diameter, 135° split point, black oxide cobalt finish, and fast spiral flute design. It is a short-flute cobalt jobber-length drill bit designed for high-performance drilling in tough materials.

Where to buy CLEVELAND C15978 drill bits worldwide?

3G Electric supplies the CLEVELAND C15978 drill bit to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this and other CLEVELAND cutting tools.

How to select the right CLEVELAND jobber length drill bit for my application?

Select the CLEVELAND jobber length drill bit based on material hardness, hole depth, and required finish. For hard metals like stainless steel, choose cobalt with a 135° split point (like the C15978) to reduce thrust and improve accuracy. Match the letter or fractional size to your hole diameter specification.

Used in

Common applications for CLEVELAND
Aerospace manufacturing — CLEVELAND NAS-spec aircraft extension drills for drilling fastener holes in aluminum airframe panels.
Bridge construction — CLEVELAND Morse-taper shank bridge reamers for enlarging bolt holes in structural steel.
Automotive production — CLEVELAND chucking reamers for precision finishing of engine component bores.
General metalworking — CLEVELAND single-flute countersinks for deburring holes in mild steel parts.
Tool and die making — CLEVELAND interchangeable-pilot counterbores for creating recesses for socket head cap screws.
Maintenance repair — CLEVELAND cobalt aircraft extension drills for drilling hardened steel in equipment repairs.

CLEVELAND Products

3G Electric supplies CLEVELAND short-flute 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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