LUBRICATION GUIDE
DIN 51517 CLP Meaning: Industrial Gear Oil Classes
By the PCG Technical Desk · Updated 27 September 2026
Quick answer: DIN 51517 covers lubricating oils for gears and bearings. Part 1 = C (no additives), Part 2 = CL (with corrosion and oxidation inhibitors) and Part 3 = CLP (CL plus EP/anti-wear additives). Gearbox makers frequently specify “CLP 220” — an ISO VG 220 oil meeting DIN 51517 Part 3.
What CLP requires
DIN 51517-3 sets limits for viscosity, oxidation, corrosion, foaming, demulsibility and seal compatibility, and requires load-carrying performance in the FZG gear test and bearing wear tests.
SERVO grades and DIN 51517
- Servomesh Plus (anti-micropitting): IOCL lists DIN 51517 CLP, AGMA 9005-D95, Flender AG, US Steel 224 and David Brown S1.53.101.
- Servosyngear AMP (synthetic): IOCL lists DIN 51517 Part 3.
- Servomesh SP: IOCL lists AGMA 250.04, IS:8406 and US Steel 222/224. Specify Plus or AMP when CLP is mandatory.
Outside Karnataka? The technical information on this page applies anywhere in India. PCG Business Solutions supplies SERVO in seven Karnataka districts. If you are in another state, send us your requirement and we will point you to IndianOil's authorised channel for your area, or answer any technical question about the grade.
