SNRRadial Insert Ball Bearing, 15 mm Bore, 40 mm OD, Spherical Outer, Flat-Back Inner Ring, Eccentric Locking Collar — 2 Pcs

Product Description

What this part is

An SNR radial insert ball bearing for a 15 mm shaft, with a spherical outside diameter, a flat-back inner ring and an eccentric locking collar. Bore 15 mm, outside diameter 40 mm, total width across the inner ring and collar 28.6 mm. The spherical outer ring seats in the matching spherical seating of an SNR bearing-unit housing.

Decoding the designation

ES — SNR’s insert-bearing range fixed by eccentric locking collar.

202 — ISO-style bore and dimension code. The 2 designates the light 200 series and the 02 gives a 15 mm bore, the same convention that puts a 6202 at 15 mm by 35 mm.

What these specs mean in practice

The eccentric collar is the locking method chosen where vibration is the governing condition. An eccentric diameter formed on the extended inner ring engages a matching eccentric bore in a separate collar; driving the collar round in the direction of shaft rotation wedges the two eccentrics together, and a setscrew through the collar holds that position. The wedge action spreads its grip over a wide arc of the shaft rather than two point contacts, which is why it resists creeping loose under reversing and vibrating loads.

The flat-back inner ring extends to one side only, so the bearing runs with its collar outboard and gives a shorter overall assembly than a symmetrical wide-inner-ring insert. The spherical outside diameter accommodates initial misalignment between the shaft axis and the housing mounting face at assembly.

Published specifications

Bore: 15 mm (0.5906 in). Outside diameter: 40 mm (1.575 in). Total width including collar: 28.6 mm (1.126 in). Outer ring form: spherical. Inner ring: flat back, extended one side. Locking method: eccentric collar with setscrew. Setscrew thread: M6 × 1. Closure: single-lip seal. Rolling elements: one row of balls. Number of rows: 1.

Quantity and configuration

2 Pcs. Insert bearings with eccentric locking collars. No housings.

Fitting notes

The insert drops into the spherical seating of an SNR bearing unit — the ESP and ESSP pillow blocks, the ESF square flange, the ESFL oval flange, the ESFC round flange — and the collar goes on outboard of the bearing. The collar is driven round in the direction of shaft rotation to engage the eccentrics before its M6 setscrew is tightened.

Interchange guidance

The 15 mm bore, 40 mm outside diameter, spherical-outer, eccentric-collar insert is catalogued by other makers as RAE15NPP. ES203G2 and ES205G2 are the 17 mm and 25 mm bores in the same range. The setscrew-locked equivalent of this insert is a different locking method and therefore a related size rather than a substitution.