Angular Contact Bearings

Angular Contact Bearings — Single & Double Row Ball Bearings

Angular contact ball bearings support combined radial and axial (thrust) loads simultaneously — the contact angle between ball and raceway determines the axial load capacity. AIMS Industrial stocks angular contact bearings from NACHI, Koyo, IJK, and JAF — single-row (7000, 7200, 7300 series), double-row, and matched-pair configurations for machine tool spindles, pumps, compressors, and gearboxes.

Angular Contact Bearings We Stock

Single-Row Angular Contact Bearings (7000/7200/7300 Series)

Single-row angular contact ball bearings in 15°, 25°, and 40° contact angles — higher contact angle provides greater axial load capacity at reduced radial capacity. NACHI 7200 series (light series) and 7300 series (medium series) are proven workhorses for machine tool spindles and pump shaft applications. Koyo angular contact bearings offer an excellent alternative across the 7000–7300 size range.

Double-Row Angular Contact Bearings

Double-row angular contact bearings (5200, 5300 series) combine two rows of balls at opposing contact angles — providing bidirectional axial load capacity in a single bearing. NACHI 5200 and 5300 open and sealed series are stocked for gearboxes, conveyor drives, and industrial fans where axial loads occur in both directions.

Matched Pair (Duplex) Angular Contact Bearings

Matched angular contact bearing pairs provide stiffness in both axial directions when mounted in tandem. NACHI matched-pair bearings (DU series) are pre-selected for consistent internal geometry, eliminating individual bearing selection and adjustment for spindle applications. Back-to-back (DB) mounting resists tilting moments; face-to-face (DF) accommodates shaft misalignment.

Super Precision Angular Contact Bearings

High-precision angular contact bearings for CNC machine tool spindles providing sub-micron runout and dimensional accuracy at high spindle speeds. NACHI CYDU series precision matched sets are available for grinding spindles, turning centres, and machining centre applications where P5 or better tolerance is required.

Angular Contact Bearing Selection Guide

Contact Angle Selection

• 15° contact angle — high speed, moderate axial load
• 25° contact angle — balanced speed and axial load (most common)
• 40° contact angle — high axial load, lower speed

Select the contact angle to match the axial-to-radial load ratio in the application.

Preload for Spindle Applications

Machine tool spindle bearings operate under light preload — a small axial interference that eliminates internal clearance and provides stiffness. NACHI and Koyo supply matched bearings with light, medium, and heavy preload classes — select the preload specified in the machine tool manufacturer’s maintenance documentation.

Lubrication

Angular contact bearings in machine tools are typically oil-mist or grease lubricated to a high-temperature rated NLGI 2 bearing grease. Over-greasing is the most common cause of bearing overheating — do not exceed the bearing manufacturer’s specified fill quantity.

Expert Support: Contact our team or request a quote — we’ll help size and specify the right valve for your pipeline and fluid handling requirements.

As a proudly Australian business since 1988, we stock locally and work with trusted distributors to ensure fast, reliable supply.

See our full bearings range including deep groove bearings, cylindrical roller bearings, and bearing housings.