What this part is:

INA 51111 is a single-direction axial deep groove thrust ball bearing, 55 x 78 x 16 mm, with a pressed steel cage. Unit Quantity: 1 Pc. One complete bearing: shaft washer, housing washer and ball and cage assembly together.

Decoding the designation:

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.

Specifications:

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). 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. Minimum load factor: 0.036. Lubricant: grease or oil. Operating temperature range: -30 °C to +150 °C.

Dimensions and mounting:

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.

Compatibility and replacement:

Same designation from other makers: SKF 51111, FAG 51111, NSK 51111, NTN 51111, Koyo 51111, Timken 51111. Searchable forms of the number: 51111, 511 11, 51111 thrust, 8111.

Frequently asked questions:

What are the dimensions of the INA 51111?

Bore 55 mm, outside diameter 78 mm, height 16 mm.

What load ratings does the INA 51111 have?

Dynamic axial load rating 30,500 N and static axial load rating 75,000 N. Limiting speed is 6,100 rpm and reference speed is 5,200 rpm.

What cage and lubrication does the INA 51111 use?

A pressed steel cage. Lubrication is grease or oil, over a temperature range of -30 °C to +150 °C.