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When your spindle, motor shaft, or gearbox demands a bearing that handles both radial and axial loads simultaneously, standard deep-groove bearings fall short. Engineers, machinists, and equipment builders working on CNC spindles, pump assemblies, and precision instruments rely on angular contact ball bearings to maintain shaft positioning under combined loading — without the deflection that causes premature wear and vibration.
These angular contact ball bearings are single-row, AC-type (15° contact angle) units manufactured to meet standard dimensional tolerances. The series covers bore diameters from 6 mm (0.24 in) up to 60 mm (2.36 in), with outer diameters ranging from 17 mm (0.67 in) to 95 mm (3.74 in) and widths from 6 mm (0.24 in) to 18 mm (0.71 in). Each bearing features a steel inner ring, outer ring, and ball complement with a pressed steel or machined cage depending on the size series.
Typical use cases include CNC machine tool spindles requiring axial pre-loading, electric motor front-end bearings subject to belt tension, and pump impeller shafts where thrust loads are generated by fluid pressure. The 7000AC–7304AC designation range covers the most widely specified sizes for light-to-medium duty angular contact applications, making them a direct replacement for OEM bearings in industrial and workshop equipment.
| Bearing Type | Single-Row Angular Contact Ball Bearing |
|---|---|
| Contact Angle | 15° (AC designation) |
| Bore Diameter (d) | 6 mm – 60 mm (0.24 in – 2.36 in); see variant options |
| Outer Diameter (D) | 17 mm – 95 mm (0.67 in – 3.74 in); see variant options |
| Width (B) | 6 mm – 18 mm (0.24 in – 0.71 in); see variant options |
| Series Covered | 706AC, 708AC, 7000AC–7012AC, 7200AC–7208AC, 7303AC–7304AC |
| Ring Material | Bearing-grade steel |
| Cage Type | See variant options |
| Lubrication | Grease or oil (unlubricated — apply before installation) |
| Mounting Arrangement | Single, paired DF / DB / DT |
| Dimensional Standard | ISO 15 / DIN 628-1 |
| Quantity per Order | 1 Pcs (select size above) |
Match the bore diameter (d) to your shaft diameter and the outer diameter (D) to your housing bore. Check the width (B) against your available axial space. All dimensions are listed in each variant name in the format: Series–d×D×B mm. For example, 7005AC–25×47×12 mm means bore 25 mm, OD 47 mm, width 12 mm.
The 15° AC contact angle allows these bearings to carry combined radial and axial (thrust) loads. They are rated for axial load in one direction per bearing. For bidirectional thrust, mount two bearings in a back-to-back (DB) or face-to-face (DF) arrangement. Specific dynamic and static load ratings vary by size — consult the bearing series datasheet for your selected size.
Yes. Angular contact ball bearings are the standard choice for machine tool spindles precisely because of their ability to handle combined loads at elevated speeds. The smaller bore sizes (7000AC–7006AC) are particularly suited to high-speed spindle duty. Ensure proper pre-loading and lubrication for optimal spindle performance.
These bearings are supplied without pre-applied grease (open design). Apply a suitable bearing grease or oil before installation according to your equipment manufacturer's specification. For high-speed applications, oil-mist or oil-jet lubrication is often preferred over grease.
No. A single angular contact bearing handles axial load in one direction only. To support bidirectional thrust, you must use two bearings mounted in opposition — either back-to-back (DB) or face-to-face (DF). Tandem (DT) mounting increases unidirectional thrust capacity but does not provide bidirectional support.
The series number indicates the dimensional series (width and OD relative to bore). The 7000 series is the lightest (narrowest width, smallest OD for a given bore). The 7200 series has a larger OD and higher load capacity for the same bore. The 7300 series is heavier still, with an even larger OD and width, suited to applications requiring greater radial and axial load ratings. All share the same 15° AC contact angle.
Yes, provided the OEM bearing uses the same ISO 15 boundary dimensions. The 7000AC–7304AC designations follow internationally standardized dimensions, so a 7005AC from this listing will have the same d×D×B as any other ISO-compliant 7005AC bearing. Always verify the contact angle suffix (AC = 15°) matches your original bearing before ordering.
