Spindle Rod

When you cannot turn the adjustment dials on your traction frame to change the tension, or if the wheels feel completely locked up and stripped, the problem lies with the internal screw mechanism. Daily micro-adjustments put a lot of pressure on the tiny threads that regulate the height of your device. If a thread strips or the center pin gets bent, your frame loses its ability to calibrate tension accurately.

Whether you call it a threaded dial pin, an adjustment wheel screw, or a calibration rod, this Spindle Rod is the exact hardware replacement required to restore full adjustability to your device’s frame.

As you can see in picture, this direct manufacturer spare part features a solid metal rod with threaded ends and a distinct, ridged thumb-wheel fixed right in the center. It functions as the micro-adjustment drive inside your ProExtender side tubes, allowing you to manually dial in precise millimeter changes to safely control your traction therapy routine.

Real Mechanical Issues This Replacement Screw Solves:

• Adjustment Wheels Spinning Freely: If you turn the dials on your device but the height or tension bars aren’t moving up or down, the internal threads have likely stripped out from extended use. Swapping in this new rod restores the solid mechanical grip required to push the frame upward.

• Jammed or Hard-to-Turn Dials: Over time, tiny amounts of dust, moisture, or friction can wear down the metal tracking. The fresh, crisp threading visible on both ends of the rod provides effortless, buttery-smooth manual adjustments.

• Bent Center Pins: If your device took an accidental drop onto a hard floor while disassembled, this long internal pin can warp. Even a tiny, unnoticeable bend will cause the adjustment wheels to bind up. A fresh, perfectly straight replacement part solves this instantly.

• Heavy-Duty Metallic Grip: The center wheel features a textured, deeply ridged design. This ensures your fingers won’t slip when you are dialing in high-tension settings, even if your hands are slick with water or washing soap.

FAQ

Q: What exactly does the Spindle Rod do?

A: This rod acts as the main jack-screw for your traction frame. When you turn the visible wheels on the outside of your device, you are spinning this threaded rod. It pushes or pulls the upper extension bars to change the overall height and compress the internal calibration springs.

Q: How do I know if this is the part I need to replace?

A: If your adjustment wheels are completely stuck, if they turn but nothing happens to the height of the frame, or if you can see that the screw threads inside the side tubes are smoothed down and stripped, this is exactly the replacement piece you need.

Q: Is it difficult to install this replacement rod?

A: Not at all, and it requires no specialized tools. You simply unscrew the side extension tubes from your main frame base to expose the internal assembly. Slide the old, damaged screw pin out of its track, slot this fresh spindle rod in its place, and reassemble the side bars. Your calibration control will be instantly restored.

Q: How do I keep these threads from stripping or sticking in the future?

A: Keep them clean and dry. When washing your device, ensure no moisture remains trapped around the threads, as water can cause internal resistance over time. An occasional wipe down with a clean, dry cloth removes any buildup and keeps the metal threading spinning smoothly.