Z‑536326Railway Traction Motor Journal Box Tapered Roller Bearing

Product Overview

Z‑536326.TR1 is a single‑row tapered roller bearing specially developed for railway locomotives. It is mainly used for the traction motor journal box of electric locomotives, normally mounted back‑to‑back in pairs. It can withstand heavy radial loads and bidirectional impact axial loads, serving as a critical safety component for locomotive drive systems and meeting long‑term service requirements of over millions of kilometers.

Bearing dimensions: bore 189.738 mm, outer diameter 279.4 mm, assembly total width 52.388 mm, inner ring width 57.15 mm, basic dynamic load rating 455 kN, approximate weight 10.8 kg. It features an outer ring with integral locating flange and separable construction.

Product Features

1. Excellent heavy‑duty and anti‑impact performance Optimized roller and raceway profile reduces contact stress. The bearing bears combined heavy radial force and bidirectional axial load, adapting to alternating impact loads caused by locomotive start‑stop and curve running conditions.

2. Railway‑grade material and heat treatment Carburizing heat treatment delivers high surface hardness together with good substrate toughness. It provides strong resistance to spalling and contact fatigue, with designed service life for more than 2 million kilometers operation.

3. Outer ring with locating flange for reliable assembly Integral flange on outer ring realizes direct axial positioning inside journal box, simplifies positioning structure and fits paired mounting requirements.

4. Separable design for convenient maintenance Inner ring assembly and outer ring can be disassembled separately, facilitating field installation, inspection and regreasing service.

Typical Application

Applied to traction motor journal box of electric locomotives, installed back‑to‑back in pairs. It supports the traction motor suspended on axle, realizes floating motor support and accurate axial guidance for gear sets.

Matching counterpart model: Z‑536325.TR1. Only the bore size 190.475 mm is different, all other dimensions and load parameters remain identical. These two models are frequently used in matching pairs.