INASL181830AC3Full-Complement Cylindrical Roller Bearing – 150 mm Bore, 190 mm OD, 20 mm Width, C3 Clearance

Product Description

What this part is

INA SL181830-A-C3 single-row full-complement cylindrical roller bearing. Bore / Shaft Size: 150 mm. Outside Diameter: 190 mm. Overall Width: 20 mm. Bore Type: cylindrical. Cage Type: full complement, no cage. Internal Clearance: C3. Precision Class: standard. Closure Type: open. Number Of Rows: 1. Rolling Elements: cylindrical rollers. Weight: 1.3 kg. Design Units: Metric.

Decoding the designation

SL18 — Schaeffler’s single-row full-complement cylindrical roller bearing range, solid inner and outer rings, used as a semi-locating support bearing.

18 — the dimension series, which is what puts a 190 mm outside diameter and a 20 mm width over a 150 mm bore.

30 — the bore code: 30 x 5 gives the 150 mm bore.

C3 — radial internal clearance greater than normal.

What these specs mean in practice

Taking the cage out lets the ring gap take the maximum number of rollers, so a full-complement bearing carries far more radial load than a caged cylindrical roller of the same envelope. The trade is speed: roller-to-roller rubbing raises friction and heat, so the permissible speed is lower than a caged design of the same size.

The rib arrangement makes this a semi-locating bearing. It takes radial load plus axial load in one direction and lets the shaft move axially relative to the housing in the other, which is how a shaft gets located at one end and allowed to grow thermally at the other.

Internal Clearance: C3 gives more room than normal before the rollers are preloaded. That headroom is what absorbs an interference fit on the shaft, a heavy press into the housing, and the thermal gradient between the inner and outer ring in service.

A 20 mm width over a 40 mm diameter difference is a very thin section, which is why this series appears in gearbox and machine tool housings where the shaft is already large and the radial space is fixed.

Quantity and configuration

Unit Quantity: 1 Pc.

Mounting data

Shaft seat 150 mm, housing bore 190 mm, seat length 20 mm. Weight 1.3 kg. The C3 clearance assumes the standard interference fit on the shaft; a tighter shaft fit consumes more of it.

Interchange guidance

The NCF-scheme designation for this bearing is NCF1830V/C3: same 150 x 190 x 20 mm envelope, same full-complement single-row layout and the same C3 clearance. Bearing Material: chrome steel. Match the clearance code as well as the size: a CN part on this envelope is a related size rather than a like-for-like swap.