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Super precision angular contact ball bearing, 105mm bore x 160mm OD x 26mm wide, 15° contact angle, ABEC 7, light preload, universal design.
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| MFR / Brand | FAG |
|---|---|
| Model | B 7021C A.P4.UL / 7021C / 2MM9121 UL / 121HDL / 7021 CT Y |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 105 mm |
| OD | 160 mm |
| Width | 26 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7000 |
| Condition | New – Open box |
| Lubricant | Oil |
| Preload | Light |
| Base Number | 7021 |
| Industry Terms | Spindle bearing, machine tool bearing, super precision angular contact, precision ball bearing |
| Common Misspellings | FGA, F.A.G., B7021CAP4UL, B7O21C, B7021-CA-P4-UL |
| Application Types | Machine tool spindles, grinding spindles, precision gearboxes, high-speed rotating assemblies |
| Condition Note | Made In Germany, New Old Stock |
| Bore Shaft Size | 105 mm (4.1339 in) |
| Mpn Variants | B7021CA.P4.UL, B7021C.P4.UL, B-7021-C-P4-UL, B7021CP4UL, B7021-C-A-P4-UL, B7021CAP4UL |
| Arrangement Configuration | Universal design (UL), single |
| Precision Class | P4 (ABEC 7) |
| Min Temp | -30°C |
| Cage Type | Phenolic |
| Dynamic Load Rating | 99 kN / 22250 lbf |
| Static Load Rating | 93 kN / 20900 lbf |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120°C |
| Item Weight | 2.80 lbs |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 15 Degrees |
| Mounting Arrangement | Universal |
| Design Units | Metric |
| Part Number | B7021CA.P4.UL |
| Cross Reference 1 | 7021C-P4 |
|---|---|
| Cross Reference 2 | B7021C |
| Cross Reference 3 | B-7021-C-A-P4-UL |
A FAG B7021-C-P4-UL super precision single-row angular contact ball bearing. Bore 105 mm, outside diameter 160 mm, width 26 mm, in the ISO 7021 envelope. Open faces, universal design.
The B prefix denotes the FAG super precision angular contact series. 7021 denotes the ISO 72 series, bore code 21 giving a 105 mm bore. C denotes a 15° contact angle in the FAG scheme. P4 denotes ABEC 7 precision. U denotes a universal design, ground to stack in any arrangement. L denotes light preload.
A 15° contact angle favours speed and radial stiffness; the 25° FAG equivalent, coded E, trades speed for thrust capacity. Light preload holds heat generation and running torque down, which suits higher spindle speeds. A single row takes thrust in one direction only.
Bore: 105 mm. Outside diameter: 160 mm. Width: 26 mm. Contact angle: 15°. Precision class: P4, equivalent to ABEC 7. Preload: light. Rolling elements: steel balls, single row. Closure: open both faces.
1 Pc. Universal design, matchable into duplex or triplex sets.
Universal grinding allows this bearing to run alone or to be stacked back-to-back, face-to-face or in tandem, with preload established by the ground ring faces once clamped against square shoulders.
The ISO equivalent designation is 7021C-P4 at 15°, light preload. A B7021-E variant shares the envelope at 25° and is a related size rather than an interchange, as are medium and heavy preload variants.
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