Motor Starters vs. Contactors vs. Overload Relays: What Each One Does and Why You Need All Three
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Super precision angular contact ball bearing, 120 x 165 x 22 mm, 25° contact angle, phenolic cage, universal light preload, 7,000 rpm on grease.
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| MFR / Brand | FAG |
|---|---|
| MPN | B71924ETPAP4UL |
| Model | B 71924E T PA P4 UL / 7924-E/A / 71924ACDP4ADGA / 3MM9324WIDUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 120 mm |
| OD | 165 mm |
| Width | 22 mm |
| Material | Bearing Steel |
|---|---|
| Series | 71900 |
| Condition | New |
| Lubricant | Oil/Grease |
| Preload | Light |
| Base Number | 71924 |
| Industry Terms | Spindle bearing, super precision bearing, machine tool bearing, high speed angular contact bearing |
| Bore Shaft Size | 120 mm |
| Mpn Variants | B71924ETPAP4UL, B-71924-E-TPA-P4-UL, B71924 E TPA P4 UL, B71924E.T.P4S.UL, 7924-E/A |
| Additional Attributes | Fatigue load limit Cur 5.0 kN; axial rigidity 255 N/µm light, 409 N/µm medium, 553 N/µm heavy; lift-off force 1,705 N light; shaft shoulder da 128 mm h12; outer ring shoulder Da 157 mm H12; ra max 0.6 mm; r min 1.1 mm; pressure cone apex distance a 44.2 mm |
| Min Temp | -30°C |
| Cage Type | Not specified |
| Dynamic Load Rating | 72 kN (Cr, radial) |
| Static Load Rating | 56 kN (C0r, radial) |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 100 °C |
| Item Weight | 1.14 kg (2.51 lb) |
| Cage Material | Phenolic (laminated fabric) |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Internal Clearance | N/A - preloaded bearing |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25 ° (degrees of arc) |
| Mounting Arrangement | Universal - matchable in pairs or sets (back-to-back, face-to-face or tandem) |
| Part Number | B71924E.TPA.P4.UL |
| Cross Reference 1 | SKF 71924 ACDGA/P4A |
|---|---|
| Cross Reference 2 | NSK 7924A5TYNSULP4 |
| Cross Reference 3 | Fafnir 3MM9324WI |
| Cross Reference 4 | 3MM9324WIDUL (matched pair designation, two bearings) |
FAG B71924E.TPA.P4.UL super precision angular contact ball bearing, also called a spindle bearing. Series B719, ISO 719 dimension series. Bore: 120 mm. Outside diameter: 165 mm. Width: 22 mm. Single row, open, straight bore. Searchable forms: B71924E.TPA.P4.UL, B71924ETPAP4UL, B-71924-E-TPA-P4-UL, B71924 E TPA P4 UL, 7924.
Contact Angle: 25°. Cage Material: laminated fabric phenolic. Precision Class: P4, ABEC 7. Preload: light. Arrangement: universal single bearing, adjusted for mounting in pairs or sets. Preload force in a light-preload pair: 587 N.
A 25° contact angle carries more thrust and gives higher axial rigidity than a 15° bearing on the same envelope, at a lower speed ceiling. Basic dynamic load rating, radial: 72 kN. Basic static load rating, radial: 56 kN. Fatigue load limit, radial: 5.0 kN. Limiting speed: 7,000 rpm on grease, 11,000 rpm on oil. Axial rigidity in light preload: 255 N/µm. The 719 series runs a narrower, thinner section than a 70 series bearing of the same bore, which keeps mass and spindle overhang down.
One bearing. Universal design: two or more mount together back-to-back, face-to-face or in tandem, and a pair sets light preload without shims or measurement.
Diameter shaft shoulder: 128 mm. Shoulder diameter outer ring: 157 mm. Maximum recess radius: 0.6 mm. Minimum chamfer dimension: 1.1 mm. Distance between the apexes of the pressure cones: 44.2 mm. Operating temperature range: -30 °C to 100 °C. Weight: 1.14 kg.
Current Schaeffler designation for this bearing: B71924E.T.P4S.UL. Equivalents at the same 25° contact angle and P4 class: SKF 71924 ACDGA/P4A, NSK 7924A5TYNSULP4, Fafnir 3MM9324WI. A B71924C on the same envelope carries a 15° contact angle and is a related size.
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