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SCREWS > Set > Knurled Point
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Hex Socket Set Screw Knurled Point, Plain Finish Grub ScrewsSet Screws are used for locating and fastening knobs, gears, collars and other devices onto shafts. Standard point styles include Cone, Half Dog, Flat, Oval, Cup and Self Locking. In all cases, measure length from end to end.
The application itself typically determines which point style is appropriate. Considerations in selection include the materials involved, their relative hardness, how often the assembly is adjusted or disassembled and other factors. Standard point types are listed below along with their general attributes and typical applications. Some Set Screws use a nylon patch, which is bonded to the threads, or a pellet inset within the threaded area, to help prevent vibration-induced loosening.
For permanent location of collars, gears and pulleys on shafts, use Knurled Point Hex Socket Set Screws. They resist loosening and can tolerate severe vibration due to their counterclockwise locking knurls, which create a ratchet action. They perform well even in poorly tapped holes.
When working with soft materials, where high-tightening torques are not practical, and with hardened shafts too, consider using Cup Point Hex Socket Set Screws. The edge of the cup point digs into the mating surface to prevent slippage.
Flat Point Hex Socket Set Screws are used where parts must be adjusted or relocated often because their points cause little or no damage when tightened. They can be used against hardened shafts--especially shafts with flats for greater contact area--and are excellent with thin walled materials and on soft plugs.
Oval Point Hex Socket Set Screws, or Round or Crowned point as they are sometimes called, are used with angled surfaces and in applications requiring frequent adjustment with little or no damage to the part they bear against. Use with a circular "U" shaft groove when rotational adjustment is needed or with an axial "V" groove for longitudinal adjustment.
A sharp cone tip gives Cone Point Hex Socket Set Screws the greatest axial and torsional holding power because of deep penetration. For this reason they are used for permanent location of parts, as pivots and where fine adjustment is needed.
Half Dog Point Hex Socket Set Screws often replace dowel pins and are used for permanent location of one part to another. The cylinder point locks in a hole drilled in a shaft or against a shaft flat. They work well against hollow tubing and hardened members. |
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