Klübersynth GEM 2-220  Klübersynth GEM 2 oils Synthetic high-performance gear oils Product information 5.439 e Edition 08/00 MA-ASB/UM/KK Klübersynth GEM 2 oils • Synthetic high-performance gear oils • High scuffing load capacity • Very good wear protection • High micropitting resistance • Excellent rolling bearing test results • Rapidly biodegradable • Good viscosity-temperature behaviour • Wide operating temperature range Description The Klübersynth GEM 2 oils are high-performance gear oils with a synthetic ester oil as base oil. They achieve a scuffing load capacity > 13 in the FZG test acc. to DIN 51 354, pt. 2 (A/16,6/90), which is better than the CLP requirements. A micropitting test was performed acc. to FVA No. 54, which yielded a micropitting resistance > 10. The most comprehensive tests for rolling bearing lubrication were made with Klübersynth GEM 2-320. Tests with the rolling bearing lubricant tester FE 8 resulted in a rolling element wear mW50 < 2 mg ａnd a cage wear mK50 < 20 mg (test acc. to DIN 51819-03-D-7,5/80-80, two test runs, no failure). The oil also passed the SKF roller test (120 °C / 8 weeks). The Klübersynth GEM 2 oils have a good viscosity-temperature behaviour ａnd a wide operating temperature range. They offer good wear ａnd corrosion protection as well as ageing ａnd oxidation stability. Biodegradability as shown in the CEC-L-33-A-93 test is > 70% after 21 days. Fields of application Klübersynth GEM 2 oils may be used for the lubrication of spur, bevel ａnd worm gears as well as the associated machine elements such as sliding ａnd rolling bearings. Furthermore, they are particularly suited for applications where leaking or dripping lubricant might pose a hazard to the environment. Application notes Klübersynth GEM 2 oils can be applied by immersion, immersion circulation or injection. Drip-feed lubrication ａnd application by brush or oil is also possible, as well as use in automatic lubricating systems. Basically, Klübersynth GEM 2 oils are miscible with conventional mineral oils ａnd polyalfaolefin oils. It should be noted, however, that the oils may no longer be rapidly biodegradable when mixed with mineral or polyalfaolefin oil. For this reason careful cleaning of the gear or the oil circulation system is advisable before switching to Klübersynth GEM 2 oils. Ester-based synthetic lubricants may affect the functional characteristics of rubber seals, depending on the temperature ａnd time of exposure. For permanent oil sump temperatures of max. 80 °C, NBR seals (acrylonitrile-butadiene rubber) can be used. For higher temperatures, FKM (fluoropolymers) are suggested. It should be noted that elastomers from one or several manufacturers can behave differently. Therefore the data given in the "compatibility with elastomers" table should be used for reference purposes only. A compatibility test should always be carried out with the elastomers which are actually used. When using Klübersynth GEM 2 oils, we recommend two-component paints (catalysed lacquers) for the coating. We further recommend testing the suitability of design materials ａnd paints in contact with the selected lubricants, especially for series application. Viscosity selection for rolling bearings ａnd gears To ｓelect the correct oil viscosity, observe the bearing manufacturer＇s instructions or refer to worksheet 3 from the Society of Tribology (GfT). For determining the correct viscosity for gears, the manufacturer＇s instructions take priority in all cases. Only in cases where there are no gear manufacturer＇s instructions, the viscosity can be selected in accordance with the enclosed worksheet "Klübersynth GEM 2 oils – selection of oil viscosity for gears". Service temperature range Service temperatures are guide values which depend on the lubricant＇s composition, the intended use ａnd the application method. Lubricants change their consistency, apparent dynamic viscosity or viscosity depending on the mechano-dynamical loads, time, pressure ａnd temperature. These changes in product characteristics may affect the function of a component. For immersion lubrication of gears ａnd chains: • Klübersynth GEM 2-220/320 approx. -30 °C to approx. 130 °C When using automatic systems, observe the manufacturer＇s instructions regarding the maximum viscosity that can be pumped. Klübersynth GEM 2 oils Synthetic high-performance gear oils Product information 5.439 e Edition 08/00 MA-ASB/UM/KK Minimum shelf life The minimum shelf life is approx. 36 months if the product is stored in the original closed container in a dry place. Pack sizes 20 l canister 200 l drum Product data Klübersynth GEM 2-... 220 320 ISO VG DIN 51 519 220 320 Density (g/ml) at 20 °C, approx. DIN 51 757 0.95 0.95 Kinematic viscosity (mm²/s), 40 °C 220 320 approx. DIN 51562 100 °C 27 35 Viscosity index, approx. DIN ISO 2909 150 150 Flash point (°C), approx. DIN ISO 2592 270 270 Pour point (°C) DIN ISO 3016 ≤ -30 ≤ -30 Steel corrosion, DIN 51585 24h/60 °C – method A 0-A 0-A Compatibility with elastomers Klübersynth GEM 2-... 220 320 towards 72 NBR 902 at 100 °C / 168 h change in volume (%) approx. change in hardness (Shore A) approx. 5 - 4 5 - 4 towards 75 FKM 585 at 150 °C / 168 h change in volume (%) approx. change in hardness (Shore A) approx. 3 - 1 3 -1