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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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1 in stock
Single-direction axial deep groove thrust ball bearing, 55 x 78 x 16 mm, pressed steel cage, 30.5 kN dynamic and 75 kN static axial capacity.
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| MFR / Brand | INA |
|---|---|
| MPN | 51111 |
| Model | 51111 |
| ID | 55 mm |
| OD | 78 mm |
| Width | 16 mm |
| Material | Chrome steel |
|---|---|
| Lubricant | Grease or oil |
| Series | 511 |
| Duty Type | Standard |
| Base Number | 51111 |
| Mpn Variants | 51111; 511 11; 51111 thrust; 8111 |
| Precision Class | ABEC 1 / P0 |
| Min Temp | -30 °C |
| Cage Type | Pressed |
| Dynamic Load Rating | 30,500 N axial |
| Static Load Rating | 75,000 N axial |
| Rolling Elements | Ball |
| Max Temp | 150 °C |
| Bearing Type | Thrust Ball Bearing, Open |
| Item Weight | 0.24 kg (0.53 lb) |
| Cage Material | Pressed steel |
| Limiting Speed | 6,100 rpm |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50 |
| Mounting Arrangement | Single direction axial |
| Bearing Material | Chrome steel |
| Part Number | 51111 |
| Cross Reference 1 | SKF 51111 |
|---|---|
| Cross Reference 2 | FAG 51111 |
| Cross Reference 3 | NSK 51111 |
| Cross Reference 4 | NTN 51111 |
| Cross Reference 5 | Koyo 51111 |
| Cross Reference 6 | Timken 51111 |
INA 51111 is a single-direction axial deep groove thrust ball bearing. Bore Diameter: 55 mm. Outside Diameter: 78 mm. Overall Width: 16 mm. Rolling Elements: Ball. Number Of Rows: 1. Closure Type: Open. Cage Material: Pressed steel. Bearing Material: Chrome steel. Item Weight: 0.24 kg (0.53 lb).
511 — Axial deep groove ball bearing series, single direction. The balls run in grooved raceways machined into two flat washers, so the whole load path is axial.
11 — Bore code. Multiply by five: 55 mm.
Dynamic Load Rating: 30,500 N axial. Static Load Rating: 75,000 N axial. Limiting Speed: 6,100 rpm. Reference Speed: 5,200 rpm. Axial fatigue load limit: 3,400 N. Cage Material: Pressed steel. Lubricant: grease or oil. Operating temperature range: -30 °C to +150 °C.
The grooved raceway is what separates a 511 from a flat-washer thrust bearing: the ball sits in a matched radius, which spreads contact and lifts the static rating to 75,000 N. Static above dynamic is normal on a thrust ball type.
A minimum axial load keeps the balls rolling rather than sliding; Schaeffler gives the minimum load factor as 0.036. Series: 511. Base Number: 51111.
Shaft washer outer diameter 78 mm. Housing washer inner diameter 57 mm. Minimum shaft shoulder diameter 69 mm. Maximum housing shoulder diameter 64 mm. Minimum chamfer dimension 0.6 mm.
Both abutment faces need to run square to the shaft axis, since the washers seat flat.
Unit Quantity: 1 Pc. One complete bearing: shaft washer, housing washer and the ball and cage assembly together.
Same-envelope equivalents: SKF 51111, FAG 51111, NSK 51111, NTN 51111, Koyo 51111 and Timken 51111. The 511 series is dimensionally standardised to ISO 104, so the 55 x 78 x 16 mm envelope is the match to check.
Searchable forms of the number: 51111, 511 11, 51111 thrust, 8111 in the older metric thrust nomenclature.
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
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