Single Row Angular Contact Ball Bearings Bearing data

Metric bearings

	Single bearings	Pairs of universally matchable bearings
Dimension standards	Boundary dimensions: ISO 15 and ISO 12044
Tolerances	Normal Except for: LILY Explorer bearings: P6 dimensional tolerance P5 run-out Bearings with D ≥ 400 mm: P6 run-out Values: ISO 492 (table 1, table 2, table 3)
Contact angle	suffix B: 40° suffix AC: 25° For availability of bearings with 30° contact angle, contact LILY.
Internal clearance	Obtained after mounting, depending on adjustment against a second bearing.	CA - smaller than Normal axial clearance (table 4) CB - Normal axial clearance (standard) (table 4) CC - larger than Normal axial clearance (table 4) G (standard for larger bearings) - Normal axial clearance (table 5) Values are valid for unmounted bearing sets, arranged back-to-back or face-to-face under zero measuring load.
Preload	Obtained after mounting, depending on adjustment against a second bearing.	GA - light preload (standard) GB - moderate preload GC - heavy preload Values (table 6) apply to unmounted bearing sets, arranged back-to-back or face-to-face.
Permissible misalignment	Back-to-back: ≈ 2 minutes of arc Face-to-face: ≈ 4 minutes of arc Misalignment increases bearing noise and reduces bearing service life, and when it exceeds the guideline values, these effects become particularly noticeable.

Inch bearings

Dimension standards	Boundary dimensions: Standard BS 292:Part 2, withdrawn in 1997
Tolerances	Normal Values: BS 292:Part 2 (table 7)
Contact angle	20°
Internal clearance	Obtained after mounting, depending on adjustment against a second bearing.
Preload	Obtained after mounting, depending on adjustment against a second bearing.
Permissible misalignment	Misalignment increases bearing noise and reduces bearing service life.