Single Row Angular Contact Ball Bearings Designation system
The designations of most LILY rolling bearings follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes.
Examples and the applicable options for single row angular contact ball bearings are given below.
Examples
| 7210 BEP | where | 7210 = |  |
| B, E = |  |
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| P = |  |
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| 7210 BECBY | where | 7210 = | |
| B, E = | |
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| CB = |  |
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| Y = | |
Applicable options
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Prefixes (n.a.) |
|
Basic designation |
| Listed in table 1 | |
| Figure with four digits: drawing number identification | |
| ALS | Inch bearing |
| AMS | Inch bearing |
| Bearing size for inch bearings (divided by 8 = bore diameter) |
|
| 22 to 40 |
/8 = 2 3/4 in. (69,85 mm) bore diameter /8 = 5 in. (127 mm) bore diameter |
|
Suffixes - Internal design |
| A | 30° contact angle |
| AB | 20° contact angle (inch bearing) |
| AC | 25° contact angle |
| B | 40° contact angle |
| E | Optimized internal design |
|
Suffixes - External design (seals, snap ring groove, execution, etc.) |
| N1 | One locating slot (notch) in one outer ring side face |
| CA | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance smaller than Normal (CB). |
| CB | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have Normal axial internal clearance. |
| CC | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance greater than Normal (CB). |
| G | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have axial internal clearance. |
| GA | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have light preload. |
| GB | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have moderate preload. |
| GC | Bearing for universal matching. Two bearings arranged back-to-back or face-to-face have heavy preload. |
| -2RZ | Non-contact seal, NBR, on both sides |
|
Suffixes - Cage design |
| F | Machined steel cage, ball centred |
| J | Stamped steel cage, ball centred |
| M | Machined brass cage, ball centred; different designs are identified by a number following the M, e.g. M2 |
| MB | Machined brass cage, inner ring centred |
| P | Glass fibre reinforced PA66 cage, ball centred |
| PH | Glass fibre reinforced PEEK cage, ball centred |
| Y | Stamped brass cage, ball centred |
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Suffixes - Materials, heat treatment (n.a.) |
 |
Suffixes - Accuracy, clearance, preload, quiet running |
| P5 | Dimensional and geometrical tolerances (tolerances of run-out and orientation) to class P5 |
| P6 | Dimensional and geometrical tolerances (tolerances of run-out) to class P6 |
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Suffixes - Bearing sets, matched bearings |
| DB | Two bearings matched for mounting back-to-back |
| DF | Two bearings matched for mounting face-to-face |
| DT | Two bearings matched for mounting in tandem |
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Suffixes - Stabilization (n.a.) |
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Suffixes - Lubrication (n.a.) |
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Suffixes - Other variants (n.a.) |
