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Precision Twist 209CO Cobalt Steel Taper Shank Drill Bit, Gold Oxide Finish, Morse Taper Shank, Spiral Flute, 135 Degree Point Angle

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Product Specifications
Cutting Direction
Finish Types
Gold Oxide
Shank Type
Morse Taper
Material Type
Cobalt Steel
Drill Point
Cutting Angle
135  Degrees
Brand Name
Precision Twist
Flute Type

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Size System of Measurement Flute Length Overall Length Manufacturer Series # Pkg Qty Mfr Part # ASIN

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Currently showing 1-20 of 66 Next 20 »
1/4" Inch 2-7/8" 6-1/8" 209CO 1 21316 B002E8OJ44 yes $22.49 Buy Options
9/32" Inch 3" 6-1/4" 209CO 1 21318 B0026HCHVU yes $34.14 Buy Options
5/16" Inch 3-1/8" 6-3/8" 209CO 1 21320 B002E8XI4Q yes $22.70 Buy Options
11/32" Inch 3-1/4" 6-1/2" 209CO 1 21322 B002E8TELM yes $24.90 Buy Options
3/8 " Inch 3-1/2" 7-3/8" 209CO 1 21324 B0025QG90C yes $43.93 Buy Options
13/32" Inch 3-5/8" 7-1/2" 209CO 1 21326 B0026HCI00 yes $28.35 Buy Options
27/64" Inch 3-7/8" 7-3/4" 209CO 1 21327 B0026H8PGQ yes $31.84 Buy Options
7/16" Inch 3-7/8" 7-3/4" 209CO 1 21328 B0026H3KJ8 yes $49.33 Buy Options
29/64" Inch 4-1/8" 8" 209CO 1 21329 B0025QA3XQ yes $11.33 Buy Options
15/32" Inch 4-1/8" 8" 209CO 1 21330 B0025QC82A yes $52.44 Buy Options
31/64" Inch 4-3/8" 8-1/4" 209CO 1 21331 B0025QE9B8 yes $11.61 Buy Options
1/2 " Inch 4-3/8" 8-1/4" 209CO 1 21332 B0026H5KYG yes $35.59 Buy Options
33/64" Inch 4-5/8" 8-1/2" 209CO 1 21333 B0025QC85M yes $39.15 Buy Options
17/32" Inch 4-5/8" 8-1/2" 209CO 1 21334 B002094OHE yes $37.25 Buy Options
35/64" Inch 4-7/8" 8-3/4" 209CO 1 21335 B002094OUG yes $69.73 Buy Options
9/16" Inch 4-7/8" 8-3/4" 209CO 1 21336 B0025QG95W yes $38.71 Buy Options
37/64" Inch 4-7/8" 8-3/4" 209CO 1 21337 B0025QE9EU yes $43.25 Buy Options
19/32" Inch 4-7/8" 8-3/4" 209CO 1 21338 B0025QI4UU Usually ships in 2 to 4 weeks $44.67 Buy Options
39/64" Inch 4-7/8" 8-3/4" 209CO 1 21339 B00208X78M yes $47.29 Buy Options
5/8" Inch 4-7/8" 8-3/4" 209CO 1 21340 B0025QA44O yes $74.12 Buy Options

Key Features

  • Morse taper shank, for a secure and accurate tool-holding system
  • Long length drill bits (also called taper length) have longer flutes and overall lengths than Jobber drill bits
  • High-speed steel (HSS) containing cobalt is a good combination of toughness and hardness, for use on drilling through hard substances
  • 135-degree, notch-point angle is self-centering, reduces walking, good for hard material and reduces pressure on cutting edges
  • Gold oxide to retain cutting fluid and prevent chip to tool welding

Product Description

The Precision Twist 209CO taper-length drill bit is a 135-degree, notch-point, heavy duty, Morse taper shank drill bit made of high speed steel and cobalt with a gold oxide finish. Best performance with drilling into hardened, tempered alloy steel, nodular graphite malleable cast iron, and stainless. It is suitable for drilling to a depth up to four times the diameter of the drill.

The 209CO series has a type N flute form, with a regular helix angle (21 to 34 degrees). 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. 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 Morse taper is a shank that is tapered from one end to another. The taper of the tool fits into the taper of the tool-holder. The friction between the surfaces provides a secure holding systems and accurate placement of the tool. A drift pin is knocked into the slot at the tang to remove the tool.

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 are commonly used to drill holes with hand-operated drills, standalone drill presses, or lathes. The flutes of the drill bit act a passageway for chip extraction from the hole and for coolant to enter the hole. These drill bits have a right-hand twist that brings chips up and away from the cutting edge. They are made to DIN 1897 industry standards (metric sizing), which helps 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. They have locations around the world, and provide tools adhering to ANSI, NAS, and DIN standards.

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