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MACHINE KEY TYPES Form B
Gib Head
Form A
Form B machine keys with both ends square feature straight, 90º parallel sides and provide the most surface contact with both the key seat and the hub of a sprocket, gear, pulley, or cog.
More common in Europe than the U.S., form A machine keys have rounded end profiles so the key fully fills a milled key way. Some users suggest that the round design eases installation into the key way.
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Gib head keys are tapered machine keys that are hammered in place to secure pulleys and gears tightly on the shaft. The added feature of a head provides for easy removal.
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Woodruff
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Hi-Pro
Woodruff keys are used to avoid milling a key way near stress concentration prone shaft shoulders at the end of a shaft. With a woodruff key, the key way does not extend to the end of the shaft so a stronger design is realized.
FREE MTRs
A variation of the woodruff key is the highprofile or hi-pro key. These keys have “feet” that prevent the key from rocking and limit movement in a rounded key way.
* Some exclusions apply
Visit huyett.com to download Material, Compliance, and RoHS/REACH Certifications* in your Account Order History. Page 78
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Also Available...
* Some exclusions apply
Oversize or Undersize? OVERSIZE The actual size of oversize material will be at least the specified size and may be slightly larger than the specified size within the acceptable tolerance range.
UNDERSIZE The actual size of undersize material will be at least the specified size and may be slightly smaller than the specified size within the acceptable tolerance range.
Hex and round Machine ke ys are available as a special o rder see pages 40 – 45 for Hex and round Ke y stock
Prices, materials, dimensions, tolerances, designs, and grades subject to change without notice. © 2022 Huyett
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