Rail axle box grease lubricates the journal / roller bearing inside the axle box at each end of a rail vehicle axle. RDSO M-942 Class B specification. Indian Railways uses ~2,500-3,500 MT/year across loco + coach + wagon. Modern high-speed Vande Bharat (180 km/h) demands premium PAO + polyurea; freight wagon (60-100 km/h) uses conventional lithium complex Class B. This guide gives the recommended BOM, the matching grease additive package, and the Indian Railways tender opportunity.
| Component | Function | % (m/m) | Indian Supplier |
|---|---|---|---|
| Group II 220N base oil | Primary base — sustained service life | 68.0% | HPCL / IOCL Group II |
| 12-Hydroxystearic acid | Primary fatty acid for Li soap | 6.5% | Croda / Wilmar India |
| Azelaic acid | Complexing C9 dibasic | 1.5% | Croda / specialty |
| Lithium hydroxide monohydrate | Alkali | 1.8% | FMC / SQM |
| Sulphurised olefin EP | EP for axle box shock loading | 3.0% | Lubrizol Anglamol / BRB |
| Mixed ZDDP AW | Anti-wear, secondary AO | 1.5% | Lubrizol / LC-AW-ZDDP |
| MoDTC FM (high-speed) | Friction reduction high-speed bearing | 0.5% | Vanderbilt Vanlube 829 |
| Methylene-bis-DTBP phenolic AO | Long-life primary AO (extended drain) | 0.8% | Albemarle Ethanox 4710 |
| Alkylated DPA aminic AO | Long-life secondary AO | 0.6% | LANXESS Naugalube 438L |
| ASA + TTA CI | Ferrous + yellow-metal protection | 0.6% | King K-Corr + Cobratec |
| Calcium nitrite | Vapour-phase rust | 0.5% | Indian inorganic |
| PIB tackifier (Mn 1300) | Bearing race adhesion | 0.8% | BASF Glissopal |
| Group II 110N diluent | Consistency fine-tune | 13.9% | HPCL Group II |
| TOTAL | 100.0% | — | |
Process: lithium complex saponification (12-HSA + LiOH at 195 °C; add azelaic + LiOH at 220 °C); dehydrate vacuum 180 °C; cool to 100 °C and add EP / AW / FM / AO / CI / tackifier; mill to NLGI 2. QC per RDSO M-942 Class B: drop >265 °C, penetration 265-295, 4-ball weld 315 kgf, water washout <8%, D942 oxidation <30 kPa @ 100 hr. Ex-works cost ₹170-240 / kg conventional; ₹240-340 / kg high-speed PAO variant (LC-RAIL-AB-HS for Vande Bharat / Tejas). Pack 18 kg pail or 180 kg drum to railway depot via tender supply. Each batch should clear full ASTM lubricant & grease testing against the RDSO panel before dispatch.
Rail axle box grease lubricates the journal / roller bearing inside the axle box at each end of a rail vehicle axle. Distinct from flange / curve grease (M-942 Class A applied to wheel flange) — axle box grease is for the bearing inside the cast-iron axle box. RDSO M-942 Class B specification.
Indian Railways uses ~2,500-3,500 MT/year of Class B axle box grease across loco + coach + wagon fleet. Vande Bharat (180 km/h), Tejas (160), Rajdhani Shatabdi (130) demand higher-spec; freight wagon (60-100) uses conventional. Lithium complex NLGI 2 with extended oxidation life is the modern standard, and a volume at this scale is what makes evaluating the grease plant setup cost worthwhile.
RDSO M-942 Class B lithium complex NLGI 2 BOM (%): Group II 220N 68%, 12-HSA 6.5%, azelaic 1.5%, LiOH 1.8%, sulphurised olefin EP 3%, ZDDP 1.5%, MoDTC 0.5%, methylene-bis-DTBP AO 0.8%, aminic AO 0.6%, ASA + TTA CI 0.6%, Ca nitrite 0.5%, PIB tackifier 0.8%, balance Group II diluent.
Process: Li complex saponification 195-220 °C; cool 100 °C, add additives; mill NLGI 2. Drop >265 °C, 4-ball weld 315 kgf, water washout <8%, D942 oxidation <30 kPa.
Different. Vande Bharat (180 km/h) and high-speed Indian rail (Tejas 160, Shatabdi 130) demand premium — synthetic PAO base, polyurea or lithium complex thickener, FE9 bearing life >25,000 hr, low noise, 100,000+ km maintenance-free. RDSO M-942 Class B High-Speed sub-spec.
Freight wagon (60-100 km/h) accepts conventional — mineral or Group II base, lithium complex, FE9 life >10,000 hr. Service interval 30,000-50,000 km. Cost differential 40-80% premium for high-speed.
RDSO Class B approved: IOCL Servo Rail Axle Bearing Grease (largest), BPCL Mak Rail Axle, HPCL HiTec Rail, Castrol, Gulf, Apar, Tide Water Veedol, Savita Oil. ~12-15 RDSO-approved suppliers. Tender pricing ₹200-320 / kg.
Annual tender per railway zone (Northern, Eastern, Southern, Central, Western + 9 more zones + DMRC + LMRC metro). Lubechem custom (LC-RAIL-AB-NLGI2) ex-works ₹170-240 / kg conventional; ₹240-340/kg high-speed PAO variant.
(1) Freight wagon — 30,000-50,000 km or 24-36 months. Re-greasing during overhaul. (2) Passenger coach — 50,000-80,000 km. (3) Locomotive axle (WAG / WAP class) — 60,000-100,000 km. (4) Vande Bharat / high-speed — 100,000-150,000 km with sealed-for-life polyurea.
Re-greasing at railway workshop — wheels lifted, axle box opened, old grease cleaned, fresh grease packed (200-500 g per axle box). Tender supply in 18 kg pail and 180 kg drum to depot.
Share your application (loco / coach / wagon / Vande Bharat), tender volume and RDSO approval status. We respond within one business day.