Double-ended Bolts with Left-hand and Right-hand Threads

Double-ended bolts with Left-hand and Right-hand threads are also known as stretch screws or adjusting screws. The core design is a metal frame with a threaded left-hand hole (LH) on one end, and a threaded right-hand hole (RH), on the other. Then, eyebolts or hooks or jaws can be screwed in each end.

  • Material:  42CrMo4+QT, Stainless steel
  • Dimensions: M18, M10, M12 (Custom manufactured to specific requirements)

Are You an OEM Manufacturer?

Yes

Superior Features of Double-ended Bolts with Left-hand and Right-hand Threads

  • Simultaneous and Precise Adjustment: The connector’s distance can be easily adjusted by rotating the connector. This allows for a quick and accurate tightening and loosening. This is important for situations in which the spacing must be adjusted often.
  • High Efficiency and Ease of Use: The two-way adjustment can be completed by rotating only one part, compared to the traditional system of two bolts with locking nuts. This simplifies the process and saves time.
  • Excellent Vibration Resistance and Self-Locking: When a threaded part is subjected to vibration or impact (e.g. a right-hand screw loosening anticlockwise), this loosening tendency will be immediately converted to tightening at the other end (left-hand screw). This mechanism is ideal for environments that are prone to vibrations because it has excellent self-locking and anti-loosening properties.

Materials of Double-ended Bolts with Left-hand and Right-hand Threads

Applications of Double-ended Bolts with Left-hand and Right-hand Threads

1. Tensioning and Bracing Systems

  • Installed in the joint of industrial robot and cooperative robot, it transmits the power of micro servo motor to the actuator; used for Z-axis transmission of precision assembly line and SCARA robot.
  • Wire Rope & Cable Systems: The most common application. Used for guylines, guardrails, safety fences, stage rigging, and sail controls on boats to tighten and loosen cables easily.

2. Fixtures and clamping devices

  • Quick clamps: They are the core components of many fast clamping devices. By rotating the handle, the workpiece can be quickly clamped or released.

3. Daily use

  • Telescopic Props: The core mechanism inside many telescopic shower curtain rods or temporary support poles is a double-ended turnbuckle, which uses the rotation to push the ends outward and create a secure, friction-fit hold.

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