QIBR and a Turkish precision machining company have reached a collaboration agreement regarding cross tapered roller bearings

By improving the machining process, QIBR has maximized the precision of its cross tapered roller bearings

Customer introduction

Precision Engineering Solutions Ltd. is a leading provider of high-precision machining services, specializing in the production of components for the aerospace, automotive, and medical device industries. With a commitment to quality and innovation, they deliver high-tolerance parts that meet the stringent requirements of their clients.

a) Challenge (Existing Issues and Why They Haven't Been Solved)

High-precision CNC vertical turning lathes are widely used for their precision and efficiency. One of the key aspects of their precision is the control of the worktable's accuracy. However, previously, the worktables of high-precision vertical lathes often failed to meet design requirements for load-bearing capacity during operation. This resulted in unstable rotation of the worktable, which could not meet the precision requirements for machining parts.

b) Solution (How QIBR Solves the Problem)

1. Enhanced the accuracy and efficiency of part machining.
2. Reduced equipment downtime and maintenance costs.
3. Enhanced the stability and long-term reliability of the equipment.
4. Lowered energy consumption and costs during the machining process.

QIBR's technical team conducted testing and research on the cross roller bearings used in high-precision vertical turning lathes and discovered that traditional tapered roller bearings did not meet the requirements for high load capacity and precision simultaneously. To address this issue, QIBR proposed several improvements:

• Line Contact Design: Ensured that the rollers and raceway surfaces have line contact.
• Pure Rolling Design: Implemented a pure rolling design for the tapered roller bearings.
• Axial Preload Adjustment: Adjusted the axial preload during installation.
• Nylon Spacers: Used nylon spacers between the rollers to maintain proper spacing.

The new design features an outer diameter of 52 mm, an inner diameter of 20 mm, a width of 18 mm, and a total weight of 0.28 kg. Test data showed the following performance metrics:

• Basic dynamic load rating: 49.9 kN
• Basic static load rating: 44 kN
• Maximum speed: 13,000 rpm
• Precision level: P6

The cross tapered roller bearings, with their line contact and high precision, high speed, and high load characteristics, were applied to the high-precision vertical turning lathe's spindle. This significantly improved the rotational precision and load capacity of the worktable while reducing the height and weight of the spindle structure. Practical applications have demonstrated that using cross tapered roller bearings substantially enhances the rotational accuracy and load-bearing capability of the worktable.

c) Results

1. Improved the rotational precision and load capacity of the worktable.
2. Enhanced the accuracy and efficiency of part machining.
3. Reduced equipment downtime and maintenance costs.
4. Enhanced the stability and long-term reliability of the equipment.
5. Lowered energy consumption and costs during the machining process.

Customer Testimonials
We highly commend QIBR's professional products and services and will continue to choose them as our partner.

QIBR's technical experts provided us with a highly customized product solution to address issues with our high-precision vertical turning machine's worktable, such as inadequate load-bearing capacity and subpar part machining accuracy. The QIBR team provided us with test results, which matched the data obtained from our factory's technical tests. After installing the QIBR-designed cross tapered roller bearings, we immediately observed an improvement in the machining precision of the vertical turning machine, reaching a P6 level, and the machine operation became smoother.