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Adjusting Hinges with a Jacking Nut and Bolt System

Published in Hinge Adjustment 3 mins read

How Do You Adjust Friction Hinges?

Adjusting friction hinges involves carefully manipulating their mechanisms to control the door's closing speed and holding power. The specific method depends heavily on the hinge's design. Some hinges utilize set screws, while others employ a jacking nut and bolt system.

This is a common method found in many applications, including RV doors.

  • Locate the Adjustment Mechanism: Usually, this involves finding a small nut and bolt, often requiring a small hex key or similar tool for adjustment (as shown in various forum posts).
  • Hold One Part Still: Secure one side of the hinge to prevent it from moving.
  • Rotate the Bolt: Turning the bolt anti-clockwise will increase friction, causing the door to close more slowly or hold its position better. Turning it clockwise will decrease friction.
  • Incremental Adjustments: Make small adjustments (e.g., 1/4 turn at a time) to avoid over-tightening or loosening. Check the door's movement after each adjustment.

Example: In an RV setting, adjusting the friction hinges on a cabinet door might involve using a small hex key to turn the adjusting bolt until the door closes smoothly without slamming.

Adjusting Hinges with Set Screws

Some friction hinges use set screws to adjust friction.

  • Locate the Set Screws: These are typically small screws located on the hinge itself.
  • Tighten for Increased Friction: Tightening these screws will increase the clamping force, leading to greater friction. Loosening them reduces friction.
  • Incremental Adjustments: Again, make small adjustments and test the door's operation.

Example: In a window application, adjusting set screws on the friction hinges might be necessary to prevent the window from rattling or closing too forcefully.

Hinges Without Adjustment Mechanisms

Not all friction hinges offer adjustable mechanisms. Some designs are fixed, pre-set, and non-adjustable (as mentioned in some online forum discussions). In these cases, lubrication might be the only option to improve the door's movement.

Important Considerations

  • Manufacturer's Instructions: Always consult the manufacturer's instructions for your specific hinges, if available. Some manufacturers advise against adjusting their friction hinges.
  • Gentle Adjustments: Over-tightening can damage the hinge mechanism. Proceed with caution and make incremental adjustments.

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