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Dormer A190 High Speed Steel Jobber Length Drill Bit Set with Plastic Case, Black Oxide Finish, 118 Degree Conventional Point, Metric, 91 piece, 1.0 mm to 10.0 mm in 0.1 mm increments

4.5 out of 5 stars 3 customer reviews

Price: $237.76 & FREE Shipping
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Specifications for this item
Brand Name Dormer
Part Number 179482
Material Type High-Speed Steel
Finish Types Black Oxide
Number of Items 1
Cutting Angle 118  Degrees
Cutting Direction Right-Hand
Drill Point Conventional
EAN 7320760179482
Flute Type Spiral
Item Weight 4.41 pounds
Manufacturer Series Number A190
Shank Type Round
Style Name Jobber
System of Measurement Metric
UNSPSC Code 20121600

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Product Features

  • Set of 91 jobber length drill bits includes metric sizes 1.0 through 10.0 mm in 0.1 mm increments
  • High-speed steel (HSS) provides hardness for wear resistance
  • Black oxide finish reduces bit wear while promoting chip and coolant flow on ferrous material
  • 118-degree conventional point for a range of drilling applications
  • Drill bits conform to DIN 338 standard

Product Description

This Dormer A190 jobber length drill bit set contains 91 high-speed steel drill bits, including metric sizes 1.0 through 10.0 mm in 0.1 mm increments, with a black oxide finish and a 118-degree conventional point for use in general-purpose applications on ferrous material. High-speed steel (HSS) provides hardness for wear resistance, and the black oxide finish acts as a lubricant to reduce wear while promoting chip and coolant flow. These jobber length drill bits have a drilling depth up to four times their diameter. The round shank accommodates most drill chucks. The set comes in a plastic index case with labeled compartments for identification and organization. Drill bits conform to Deutsches Institut für Normung (DIN) 338 standard.

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 to work with 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 drill bits (also called Silver and Deming drill bits) have a shank that is smaller in diameter than its shaft, permitting drilling machines with either a 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 twist drill bits (also called extension) are longer than long length twist drill bits for greater reach or for drilling deeper holes.

Precision Dormer manufactures cutting tools under the brands Precision Twist, Dormer, and Union Butterfield. The company, headquartered in Crystal Lake, IL, meets International Organization for Standardization (ISO) standards 9001 and 14000.

What’s in the Box?

  • 91 drill bits, metric sizes 1.0 through 10.0 mm in 0.1 mm increments
  • Plastic case


Product Details

  • Item Weight: 4.4 pounds
  • Shipping Weight: 5.6 pounds (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B003JY5ZD6
  • Item model number: 179482
  • Average Customer Review: 4.5 out of 5 stars  See all reviews (3 customer reviews)
  • Amazon Best Sellers Rank: #33,797 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.

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Top Customer Reviews

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Picture is obsolete. There is no metal box. You get two plastic boxes (see my picture). The larger size bits have an inset metal band around the shank with the millimeter size in large numerals. All the bits, except the very small ones, are laser engraved so the fonts are jaggy. It says they are from Brazil. The tips are standard chisel-point geometry and the flutes are sharpened. Sharpness is average (will shave fingernail, but not catch on it).

The main advantage of this set is that it is decent quality and the only one I found under $500 that has a millimeter increment, which is necessary if you are doing reaming or other precision drill work.
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Verified Purchase
Actually 2 sets, 1-5.9 and 6-10, made in brazil. None of the pictures match the product. Other than that seems to be a decent set of drills. Laser engraved with drill size so it holds well in a collet chuck.
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By S. W. on August 24, 2014
As advertised.
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