Overview – Transmission Parts BRG.;SPH.ROL 4239711 Series
If you run Hitachi transmission and swing systems as the spherical roller bearing, the Hitachi BRG.;SPH.ROL 4239711 and its series variants give you flexible sourcing without compromising fit.
Parts Characteristics
A spherical roller bearing that carries combined radial and misalignment load in a gearbox, swing or travel reduction. It tolerates shaft deflection that would destroy a rigid bearing, so a correct, genuine-spec bearing keeps the reduction running true under shock load.
Applicable Models & Applications
Fitted to Hitachi drivetrain positions specifying this spherical roller bearing. Match the bore, OD and width against your old bearing or the parts book – spherical rollers of near size differ in internal clearance and load rating.
Maintenance & Replacement
Fit a matched, genuine-spec bearing with new seals and the correct preload, never mixing old and new. A bearing even slightly wrong in clearance unloads the mesh and finds the gears under load.
Torque the retaining parts to specification. A bearing that shifts in its housing spins in the bore and destroys the housing it sits in, not just itself.
Check the shaft and housing seats before fitting. A bearing going onto a damaged seat just transfers the damage; measure, don’t guess.
Keep the correct spherical roller bearings for your model available. They are load-critical, and a reduction that stalls on a bearing is a machine sitting open on the bench.
Price Reference (USD)
The BRG.;SPH.ROL 4239711 generally falls in the USD 60-220 bracket, with expedited freight quoted separately.
Value & Service
We supply brand-new spherical roller bearings with the bore and rating confirmed against your Hitachi drivetrain, so the reduction goes back together to spec.
Related interchange numbers for the BRG.;SPH.ROL: 4363408, 4471870, 859301, 859302 – confirm the exact variant against your model’s parts book before ordering.
Racer Machinery maintains a deep inventory of Hitachi Transmission Parts, and the BRG.;SPH.ROL 4239711 is available with same-week dispatch for urgent repairs.
