Quality Assurance
Quality Assurance
UIPI specializes in single-row, double-row, and three-row roller bearings.
Capabilities and capacity:
● Size Range: 200mm to 6,000mm (6 to 240in)
● Gear: External, Internal, or Gearless
● Rolling elements: Balls or rollers in multiple configurations
● Hardened raceways and gears
● Specialized seals with EP2 lubrication
● Full Engineering: If your application sees excessive heat, moisture, or other difficult environmental variables, our team can design a bearing to fit your needs.
It All Starts with the Raw Materials:
Proper materials are imperative in manufacturing high-quality slewing bearings. Having the correct chemical composition enables bearings to hold the necessary raceway heat treatment to ensure long, consistent life. UIPI refuses to quote bearings that call for lesser quality materials, opting instead to use 42CrMo for all bearings. This material is renowned for its consistency and ability to hold heat treatment, wear and fatigue resistance, and compressive strength, making it ideal for slewing bearings.
The following chart shows our standard alloy steels with the nearest equivalent foreign grades.
Standard
Material
China
USA
Germany
UK
GB
AISI
DIN
B.S.
42CrMo
4140
42CrMo4
708M40
Heat treatment determines reliability:
Heat treatment is one of the most critical steps in the manufacturing process. Proper hardening gives UIPI bearings their characteristics of outstanding stability, hardness, and durability.
At UIPI, all heat treatment, including raceways and gears, are done in-house on state-of-the-art hardening machines. Through induction hardening, the required hardness and an adequate depth of hardness are achieved. The proper heat treatment gives bearings their load capacity, durability, and resistance to pitting or brinnelling.
100% traceability guarantees the quality:
Our quality control begins at the beginning of the manufacturing process. As each forging ring is received and inspected for chemical composition and core hardness, it is stamped with a unique tracking number. This number is get referenced through all the stages of production until the final delivery of the product.
This tracking number enables our workers to trace the material through each step of manufacturing, including where the forging came from, when it was processed, who did the processing, and the results of each inspection. This number will then correlate to the final inspection report for review by customers.
Our quality control begins at the beginning of the manufacturing process. As each forging ring is received and inspected for chemical composition and core hardness, it is stamped with a unique tracking number, and it continues through all the stages of production until the final delivery of the product.
This tracking number enables our workers to trace the material through each step of manufacturing, including where the forging came from, when it was processed, who did the processing, and the results of each inspection. This number will then correlate to the final inspection report for review by customers.
