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?

Precision Twist CO500 12 Cobalt Steel Extension Drill Bit, Gold Oxide Finish, Round Shank, Spiral Flute, 135 Degree Point Angle

Be the first to review this item

Product Specifications
Cutting Direction
Right-Hand
Finish Types
Gold Oxide
Drill Point
Conventional
Material Type
Cobalt Steel
Cutting Angle
135  Degrees
Brand Name
Precision Twist
Flute Type
Spiral
Shank Type
Round
UNSPSC Code
20121600

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, Oct 28? Order in-stock items in the next 1 day 18 hrs 34 mins and choose One-Day Shipping at checkout.

  • Share
Currently showing 1-4 of 4
Size Mfg Series # System of Measurement Flute Length Overall Length Pkg Qty Mfr Part # ASIN

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

Available

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.

Price  
All All All All All All      
Currently showing 1-4 of 4
3/32" CO500-12 Inch 1-1/4" 12" 12 52606 B0026H5TWY yes $111.07 Buy Options
1/8" CO500-12 Inch 1-5/8" 12" 12 52608 B002095O8W yes $119.06 Buy Options
11/64" CO500-12 Inch 2-1/8" 12" 12 52611 B002091JMM yes $128.24 Buy Options
7/32" CO500-12 Inch 2-1/2" 12" 6 52614 B0026H8Y4E yes $75.92 Buy Options

Key Features

  • NAS 907 type J standards, for use in the aerospace industry
  • High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling into hard substances
  • 135-degree split-point angle, for self-centering, to reduce walking, for use with hard materials, and to reduce pressure on cutting edges
  • Gold oxide finish, to help retain cutting fluid and prevent chip to tool welding
  • Extra-length, for deeper holes and more reach than regular length

Product Description

The Precision Twist CO500-12 extra-length drill bit is made of high speed steel (HSS) and cobalt with a gold oxide finish that drills holes into a wide variety of metals and synthetic materials. It can drill to a depth up to four times the diameter of the drill size. The shank diameter is the same as the drill size.

The CO500 series has a type N flute form, with a regular helix (21- to 34-degree) angle, and performs best when drilling into alloy steel, nodular graphite, malleable cast iron, alloyed titanium, or alloyed nickel. The extra length and 135-degree split-point drill geometry provide extra reach and ensure a more accurate hole by reducing walking when the hole is started. The gold oxide is a low temperature heat treatment which reduces grinding stress within the tool, and has an appealing, easy-to-identify gold color. The finish retains lubricant to aid in wear resistance and chip flow. Gold oxide is commonly used to identify cobalt steel tools. Spiral flutes act as a passageway for chip extraction from the hole and for coolant to enter the hole. Right-hand twist brings chips up and away from the cutting edge. The extra length allows for more freedom in being able to drill a wider variety of materials.

Drilling, or hole making, is the most common metalworking operation in the world. Twist drill bits are the most common type of drill bit used. Twist drill bits can be used in hand-operated drills, standalone drill presses, or a lathe. They are made to ANSI and NAS 907 type J industry standards, which ensure that drill bits around the world conform to the same specifications.

Precision manufactures machine tools under the following brands: Precision Twist, Precision Dormer, and Union Butterfield. The company has locations around the world, and provides tools adhering to ANSI, NAS, and DIN standards.

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-8pm 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 

© 2014 Amazon.com, Inc. and its affiliates.