Click for larger image and other views Image is representative of the product family. Select individual products in the table below for more specific images and product specifications

How can we improve our images or Product Specifications?

Cleveland 3780-6 Cobalt Steel Aircraft Maintenance Drill Bit, Short Flute, 6" Overall Length, Uncoated (Bright), Round Shank, 135 Degree Split Point

Be the first to review this item

Product Specifications
Cutting Direction
Finish Types
Uncoated (Bright)
Shank Type
Material Type
Cobalt Steel
Drill Point
Conventional Point
Cutting Angle
135  Degrees
Brand Name
Flute Type
Fast Spiral

This item is no longer available

These items ship for FREE with 2-Day Shipping on orders over $50. (Details)

Want it delivered on Tue, Apr 21? Order in-stock items in the next 1 day 55 mins and choose One-Day Shipping at checkout.

  • Share
Currently showing 1-9 of 9
Size name ASIN

The Amazon Standard Item Number (ASIN) uniquely identifies
the item in the (and Amazon) catalog.


If an item is currently out of stock, but has an estimated lead time, you can place an order now and we will ship it as soon as it is available.
You can also order more than we currently have in stock.
Read more about back orders in our help section.

Currently showing 1-9 of 9
#10 B003Z0BP1U yes $55.63 Buy Options
#11 B003Z0BP1K yes $55.50 Buy Options
#13 B003Z0BP1A yes $53.55 Buy Options
#16 B003Z0BP10 yes $54.20 Buy Options
#19 B003Z0BP0Q yes $47.63 Buy Options
#40 B003Z0BOZ2 yes $37.59 Buy Options
#50 B003Z0BOYS yes $12.83 Buy Options
#8 B003Z0BP2E yes $56.63 Buy Options
#9 B003Z0BP24 yes $56.57 Buy Options

Key Features

  • Aircraft maintenance drill bit meets NAS 907 Rev. 14 and ANSI standards
  • Cobalt steel provides extended tool life compared to high-speed steel drill bits when drilling hard materials
  • Uncoated (bright) finish is an untreated surface that can be used on a range of materials
  • Self-centering 135-degree split point penetrates hard material without a pilot hole and produces small chips to reduce clogging
  • Short flutes and extended length allow accurate drilling in hard-to-reach areas

Product Description

The Cleveland 3780-6 series aircraft maintenance short-flute extended-length drill bit is made from cobalt steel with an uncoated (bright) finish and has a 135-degree split point for penetrating without a pilot hole on a range of materials. The drill bit has a 6" overall length with short flutes to accurately drill in hard-to-reach areas. It meets National Aerospace Standards (NAS) 907 Rev. 14 for aircraft maintenance and American National Standards Institute (ANSI) standards. Cobalt steel provides extended tool life compared to high-speed steel drill bits, and maintains the tool's toughness and hardness in high drilling temperatures. The uncoated finish has no additional surface treatment or coating. A self-centering 135-degree split point penetrates hard material without a pilot hole and produces smaller chips that reduce clogging compared to a 118-degree point. The drill bit has a fast spiral (also called a high helix angle) with a high cutting angle and wider flutes than a standard drill for increased chip removal. Compared to a standard drill bit, the drill bit has a thicker web for increased strength and rigidity. The round shank accommodates most drill chucks.

Drill bits are cutting tools used to make holes in a range of materials using machines such as handheld portable drills, machining centers, and lathes. Drill bits come in a variety of lengths and types, the most common of which is the twist drill bit. The round, twisted shaft of the twist drill bit typically has two cutting edges and flutes. The helical twist of the flutes brings chips up and away from the cutting edges and allows for coolant to reach the cutting edges. Jobber length twist drill bits, the most common length of twist drill bit, offer a good compromise of length and reach for the widest range of materials and applications. Mechanic's length twist drill bits (also called maintenance length) are a little shorter than jobber length and less prone to deflection when drilling. Short length twist drill bits (also called stub or screw-machine length) are the shortest and stiffest twist drill bits, helping to reduce the chance of deflection or breakage when drilling. Reduced shank twist drill bits (also called Silver and Deming drill bits) have a shank that is smaller in diameter than its shaft, permitting drilling machines with a 1/4", 1/2", or 3/4" drill chuck to create large holes. Long length twist drill bits (also called taper length) are a little longer than jobber length, allowing for deeper holes and longer reach. Extra-long length twist drill bits (also called extension) are longer than long length twist drill bits for greater reach or for drilling deeper holes.

Cleveland manufactures tools for drilling, threading, and milling applications. The company, headquartered in Seneca, SC, meets International Organization for Standardization (ISO) standard 9001.

How can we improve our Product Description?

Customer Reviews

There are no customer reviews yet.

Be the first to review this item

Go to the HomePage

Order by Phone
M-F 8am-10pm ET, Sat-Sun 8am-5pm ET 800-220-4242

My Account| Returns| Help

Website Feedback| Contact Us| Sell on AmazonSupply| Become an Affiliate

Privacy Notice| Conditions of Use

Follow Us 

© 2015, Inc. and its affiliates.