- Industrial gears
- Worm gears
ISO VG 680
EP gear oil for enclosed industrial drives, with micropitting protection, up to 100 °C
GB 5903 L-CKC — industrial gear oil (China)
The Chinese national standard for enclosed industrial gear oils, class L-CKC. It matches class CKC of ISO 12925-1.
Industrial gear oil CLP — DIN 51517, part 3
Class CLP, gear oils with extreme-pressure additives; requires an FZG pass plus corrosion and ageing protection.
Industrial gear lubricant - CKC — ISO 12925
The international standard for enclosed gear drive lubricants; class CKC is the mineral oil with antioxidant, anticorrosion and antiwear additives, for moderate duty.
GB 5903-2011 — industrial gear oils (China)
The 2011 issue of the Chinese standard for enclosed industrial gear oils, with the same L-CKB, L-CKC and L-CKD classes as ISO.
| Property | Typical value | Method |
|---|---|---|
| Copper strip corrosion, 3 h, 100 CRating | 1B | ASTM D130 |
| Density @ 15.6 Ckg/l | 0.91 | ASTM D4052 |
| EP Properties, Timken OK load, lb | 65 | ASTM D2782 |
| Emulsion, Time to 37 mL Water, 82 Cmin | 30 | ASTM D1401 |
| FE8 Wear Test, V50 roller Wearmg | 2 | DIN 51819-3 |
| FZG Micropitting, Fail stageRating | 10 | FVA 54 |
| FZG Micropitting, GFT-classRating | High | FVA 54 |
| FZG Scuffing, Fail load stage, A/16.6/90 | 12+ | ISO 14635-1(mod) |
| FZG Scuffing, Fail load stage, A/8.3/90 | 12+ | ISO 14635-1 |
| Flash point, Cleveland Open Cup°C | 285 | ASTM D92 |
| Foam, Sequence I, Tendency/Stabilityml | 0/0 | ASTM D892 |
| Foam, Sequence II, Tendency/Stabilityml | 30/0 | ASTM D892 |
| Kinematic viscosity @ 100 Cmm2/s | 39.2 | ASTM D445 |
| Kinematic viscosity @ 40 Cmm2/s | 680 | ASTM D445 |
| Pour point°C | -9 | ASTM D97 |
| Rust Characteristics, Procedure B | PASS | ASTM D665 |
| Viscosity index | 90 | ASTM D2270 |

Mobilgear 600 XP 680 is part of the Mobilgear 600 XP Series, a range of extra high performance gear oils with outstanding extreme pressure characteristics and load-carrying properties, intended for all types of enclosed gear drives with circulation or splash lubrication. Formulated to keep pace with the trend toward smaller, higher power-density gearboxes, the series protects gear teeth against early-stage micropitting and exceeds industry bearing wear protection requirements, delivering up to 15 times the wear protection measured by the FAG FE 8 industry standard test. Its balanced formulation provides maximum wear and corrosion protection while remaining compatible with common gearbox seal materials, helping maintain seal integrity, prevent leaks and keep out contamination. Key benefits include reduced debris denting from wear particles (up to 22% bearing life improvement), excellent resistance to oil oxidation, thermal degradation, sludge and deposit formation, optimized rust and corrosion protection for steel and soft metal alloys, and resistance to foaming and emulsion formation. Recommended for industrial spur, helical, bevel and worm gearing operating at bulk oil temperatures up to 100°C — including conveyors, agitators, dryers, extruders, fans, mixers, presses, pulpers and pumps — as well as marine gearing (main propulsion, deck machinery, winches, cranes, pumps, elevators) and non-gear applications such as heavily loaded, slow-speed plain and rolling contact bearings. Mobilgear 600 XP 680 is the ISO VG 680 grade, with a kinematic viscosity of 680 mm²/s at 40 °C and 39.2 mm²/s at 100 °C, a viscosity index of 90 and a pour point of -9 °C. According to the manufacturer, this grade is approved by SEW-Eurodrive. It meets or exceeds the requirements of China GB 5903-2011 L-CKC, DIN 51517-3:2018-09 and ISO 12925-1:2024 L-CKC. Like the whole series, it has a Timken OK Load of 65 lb and an FZG scuffing fail load stage of 12+.
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