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ANSI B94.11M-1979 sets size standards for jobber-length straight-shank twist drill bits from 1/64 inch through 1 inch in 1/64 inch increments. For Morse taper -shank drill bits, the standard continues in 1/64 inch increments up to 1¾ inch, then 1/32 inch increments up to 2¼ inch, 1/16 inch increments up to 3 inches, 1/8 inch increments up to ...
In 1982, Harbor Freight Tools opened its first retail store in Lexington, Kentucky, to sell returned merchandise from its mail order business. The original location was at 1387 East New Circle Road. It later moved to 1301 Winchester Road, Suite 213. The venture proved successful, and Harbor Freight Tools began to open stores across the United ...
Twist drill bits are available in standard lengths, referred to as Stub-length or Screw-Machine-length (short), the extremely common Jobber-length (medium), and Taper-length or Long-Series (long). Most drill bits for consumer use have straight shanks. For heavy duty drilling in industry, bits with tapered shanks are sometimes used. Other types ...
A magnetic drill is a portable machine for drilling holes in large and heavy workpieces which are difficult to move or bring to a stationary conventional drilling machine. It has a magnetic base and drills holes with the help of cutting tools like annular cutters (broach cutters) or with twist drill bits. There are various types depending on ...
Originally, all tool bits were made of high carbon tool steels with the appropriate hardening and tempering.Since the introductions of high-speed steel (HSS) (early years of the 20th century), sintered carbide (1930s), ceramic and diamond cutters, those materials have gradually replaced the earlier kinds of tool steel in almost all cutting applications.
Watts Brothers Tool Works is a tool manufacturer located in Wilmerding, Pennsylvania.They are known for manufacturing drill bits that can drill square holes, [1] [2] including blind holes, which cannot be made with other methods such as broaching.
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