set screw

A mechanic tightens the set screw on the gear assembly.

Definition

Noun: A set screw is a type of fastener, typically a small screw, used to secure an object within or against another object, such as a collar or pulley on a shaft, by pressing firmly against it. It often lacks a head and is tightened using a wrench or Allen key.

Usage Examples

• (A small screw used to fix a gear in place on a rotating shaft.)
• (The screw must be pressed securely against the component.)

Advanced Usage

• "Set screw adjustment": the process of fine-tuning the position or tension of a part using a set screw.

  • A slight turn of the set screw adjustment corrected the alignment of the pulley. (Adjusting the set screw to achieve proper positioning.)

• "Set screw torque": the amount of rotational force applied when tightening a set screw.

  • Excessive set screw torque can strip the threads or damage the shaft. (Applying too much force while tightening.)

Variants and Related Words

• Grub screw (n): a type of set screw that is fully threaded and has no head, often used in the same way.

  • The grub screw holds the knob onto the spindle. (A headless set screw.)

• Socket set screw (n): a set screw with a hexagonal socket for use with an Allen key.

  • A socket set screw provides better grip for tightening. (A set screw designed for a hex key.)

Synonyms

• Fastener: a device that joins or affixes two objects together.
• Locking screw: a screw that prevents movement between parts.
• Tightening screw: a screw used to secure components by applying pressure.

Related Idioms

• "Tighten the screws": to increase pressure or control, often in a metaphorical sense (not directly related to set screws, but using "screw").
  • The manager tightened the screws on the team to meet the deadline. (Increased demands or pressure.)

Phrasal Verbs

• Set in: to become fixed or established (not specific to set screws, but related to the verb "set").
  • The new routine set in after a few weeks. (Became established.)

Additional Note

Set screws are commonly used in mechanical engineering, automotive repair, and machinery to lock rotating or sliding components in place without requiring a nut. They are often made of hardened steel to withstand high pressures.