Disassembly of Tire Changer Jaw Calibration Process: Hairline-level Concentricity Prevents Hub Scratches

   Many repair shop owners face frequent rim scratches during tire demounting without knowing the root cause: unqualified chuck jaw concentricity. If the concentricity deviation exceeds 1mm, the wheel hub will be clamped offset, and the mounting head will continuously rub the rim and leave permanent scratches.

   As a manufacturer with 20 years of R&D and production experience, Roadbuck implements strict dial indicator calibration for all tire changers before delivery. Technicians attach the dial indicator probe to a circular metal workpiece simulating wheel hubs and rotate the chuck. Once the pointer swing exceeds 0.5mm, workers loosen T-shaped jaw screws for fine correction to achieve hairline-level precision.

  Excessive concentricity error also leads to insufficient clamping force, causing wheel slipping and secondary damage to tires and rims. All Roadbuck tire changers including V9120 damage-free tire changer, V7110 crowbar-free tire changer and GT525 series adopt this full calibration process.

  Roadbuck controls every assembly detail with 20 years of manufacturing accumulation. Precision jaw calibration eliminates rework and customer complaints, supplying scratch-resistant and stable tire service equipment for auto repair workshops.