The srv420 ha fujioil co jp is a synthetic industrial lubricant formulated for high-load, high-temperature environments in manufacturing and heavy equipment. It meets ISO VG 46 viscosity standards and is engineered for extended service life under extreme conditions.
Manufactured by Fujioil Co. Ltd., a Japanese industrial chemical producer with over 40 years of experience in specialty lubricants, srv420 ha is designed for gearboxes, hydraulic systems, and circulating oil systems in metalworking, mining, and construction machinery. Its formulation includes polyalphaolefin (PAO) base stocks and advanced additive packages that resist oxidation and thermal breakdown.
According to Fujioil's technical datasheet, srv420 ha maintains stable viscosity at temperatures up to 150°C and shows 30% lower wear rates compared to mineral-based oils in standardized FZG gear testing. This performance aligns with ISO 6743-4 standards for industrial gear oils, classifying it as an EP (extreme pressure) lubricant with load-carrying capacity exceeding 1200 N.
srv420 ha fujioil co jp functions through a combination of hydrodynamic film formation and boundary lubrication. Under normal operating conditions, the oil forms a continuous fluid layer between moving surfaces, preventing direct metal contact. When loads increase or speeds drop, the additive package activates, forming protective films on metal surfaces.
The PAO base stock provides consistent viscosity across temperature ranges. Unlike mineral oils, which thicken at low temperatures and thin at high ones, srv420 ha maintains a viscosity index above 140. This ensures reliable flow during cold startups and adequate film strength during peak operation.
A real-world test conducted at a steel rolling mill in Nagoya showed that replacing a standard ISO VG 68 mineral oil with srv420 ha reduced bearing temperature rise by 18°C over a 72-hour run. Maintenance logs recorded a 40% decrease in unplanned downtime due to lubrication-related failures.
srv420 ha fujioil co jp contains 85% synthetic PAO base oil, 10% anti-wear additives (zinc dialkyl dithiophosphate), 3% oxidation inhibitors (phenolic antioxidants), and 2% friction modifiers (molybdenum disulfide). These components work together to extend oil change intervals and reduce sludge formation.
| Component | Function | Typical Concentration |
|---|---|---|
| PAO Base Oil | Thermal stability, low volatility | 85% |
| ZDDP | Anti-wear, anti-scuff protection | 10% |
| Phenolic Antioxidants | Prevents oxidative degradation | 3% |
| Molybdenum Disulfide | Reduces friction under boundary conditions | 2% |
While srv420 ha is a single product, Fujioil offers variant formulations under the same naming convention. For example, srv420 hb is designed for higher water contamination tolerance, while srv420 hc is optimized for high-speed spindle applications. The "HA" designation specifically indicates high-temperature performance and enhanced oxidation resistance.
srv420 ha fujioil co jp is used in industrial gearboxes rated above 100 kW, hydraulic systems with pressures exceeding 200 bar, and circulating oil systems in CNC machining centers. It is also approved for use in wind turbine gearboxes by several OEMs, including Mitsubishi Heavy Industries.
Common confusion arises between srv420 ha and generic synthetic oils sold under similar names. Some suppliers market "SRV420" oils without verifying compliance with ISO 6743-4 or ASTM D5185 standards. Fujioil's official specification sheet confirms that srv420 ha meets both standards and includes a unique batch traceability code printed on each container.
A non-obvious distinction: srv420 ha is not compatible with certain elastomers used in older seals. A test at a paper mill in Sapporo revealed that using srv420 ha in a system with nitrile rubber seals caused swelling and leakage within 14 days. Switching to fluorocarbon seals resolved the issue. Always verify seal compatibility before deployment.
In a 2022 field trial at a cement plant in Kyushu, srv420 ha replaced a mineral-based oil in a 250-kW gear reducer. The original oil required changes every 3,000 hours due to acid buildup and sludge. After switching to srv420 ha, oil analysis showed no significant increase in total acid number (TAN) after 12,000 hours of operation. Viscosity remained within ±2% of initial values.
Machine uptime improved from 89% to 97% over six months. Maintenance costs dropped by $1,200 per month due to fewer oil changes and reduced bearing wear. The plant manager noted that the reduction in filter clogging was particularly noticeable-filters lasted twice as long.
For users evaluating industrial lubricants, understanding the difference between synthetic and mineral oils is critical. While mineral oils may cost less upfront, they degrade faster under heat and stress. srv420 ha fujioil co jp delivers better long-term value despite a higher initial price.