Construction sites feature gravel, rock, mud and dust. Construction vehicles sustain repeated impact and friction during daily operation. Multi‑piece split rims may develop lock‑ring displacement and air leakage, leading to unplanned machine downtime. Anqiang's 7.5‑20 OTR steel wheel rim uses one‑piece welded construction for medium‑size off‑road equipment.
One‑Piece Welded Structure Avoids Lock‑Ring Failures
Unlike two‑piece or three‑piece split rims, this design removes lock‑ring components. Full‑penetration automatic welding forms the rim barrel. Weld seams go through inspection to reduce leakage risks when driving on rough ground. The structure suits equipment running long continuous shifts.
Production follows CNC rolling, shot‑blasting for stress relief, then glossy black anti‑rust paint.
Standard Technical Parameters
Standard unit parameters: size 7.5‑20, centre hole 353 mm, PCD 406 mm, 12 bolt holes of 22 mm, offset 2 mm, net weight 35 kg.
Q355B low‑alloy steel serves as the main material. Q235B carbon steel is available for light‑duty use. For bulk orders, Anqiang adjusts centre hole, PCD, bolt quantity, offset and paint colour to match different hub requirements.
Production and Quality Control
CNC equipment processes centre bore and bolt holes. Every finished rim passes dimension check, weld quality test and load‑bearing test before shipment.
Full‑process inspection covers raw material incoming check, forming dimension test, weld inspection, shot‑blast and paint thickness test, plus hub fitting simulation test. Batch material certificates can be provided; third‑party inspection is accepted.
Application Range
This rim fits 3‑5 ton wheel loaders working on construction sites, quarries and sand yards. It also works for site flat‑bed transport vehicles, municipal road‑maintenance machines and custom special off‑road equipment.
Common Site Issues and Handling
- Bending deformation on stony roads: Select Q355B version, avoid sustained overloading.
- Bolt hole mis‑alignment: Confirm hub parameters before placing orders; Anqiang verifies dimensions for customers.
- Surface rust in outdoor storage: Keep rims under covered storage when not in use.
Supply Conditions
Standard 7.5‑20 rims are kept in stock for fast container shipment. Anqiang offers custom mounting‑parameter modification and complete export shipping documents. Direct factory supply removes intermediate links.