Why Standard Industrial EP Gear Oils from All Suppliers Are Largely Equivalent
DIN 51517-3 Type CLP (and its ISO equivalent) is the dominant standard for enclosed industrial gear oils worldwide. All three competitor brands — HP GEAR EP, Servo SERVOMESH SP, and Castrol ALPHA SP — as well as Banesto Industrial Gear Oil are formulated to this standard. The sulphur-phosphorus EP additive chemistry, viscosity grades, and key performance tests (FZG load stage, ASTM D130 copper strip corrosion, ASTM D665 rust) are all controlled to the same specification window.
This makes grade-for-grade switching between any of these brands a straightforward exercise for standard industrial enclosed gearboxes — reducers, mixers, conveyors, steel mill drives, cement plant gears, and similar applications.
When to Be More Careful: Worm Gears and Open Gears
Standard sulphur-phosphorus EP gear oils can be corrosive to yellow metals (copper, bronze) used in worm gear bronze wheels. Castrol ALPHASYN WG and equivalent products use a non-corrosive additive system suited to worm gear bronze contact. If your worm gearbox has a bronze worm wheel, confirm the Banesto gear oil's copper corrosion rating (ASTM D130) and consult the technical team before switching. For most modern steel-on-steel gearing, this is not a concern.