Castrol Optigear Synthetic CT 320 C Synthetic Gear Oil Description Castrol Optigear™ Synthetic CT 320 C is a synthetic polyalphaolefin (PAO) gear oil designed to perform in the most challenging of applications, especially those found in the wind industry. Its high viscosity index coupled with advanced gear oil additives make it an ideal lubricant for gear boxes where large changes in temperature and humidity can not be controlled. Application Optigear Synthetic CT 320 C has been formulated specifically for use in wind turbine gear box applications but it can be used for all types of enclosed gears – including heavy and shock-loaded gears and bearings where EP properties are required. It is suitable for use in gear boxes where micro-pitting resistance is required and for a wide range of applications in extreme environments including mining and quarrying, marine applications, and paper production. Optigear Synthetic CT 320 C is fully compatible with nitrile, silicone and fluoropolymer seal materials. Optigear Synthetic CT 320 C is classified as follows: DIN Classification is CLP Optigear Synthetic CT 320 C meets the requirements of: DIN 51517 Part 3 and Part 4 and GB/T 33540 Advantages When compared to more conventional gear oils Optigear Synthetic CT 320 C has the following advantages: Maximum protection of gears against wear and shock loading, including protection against micro-pitting. Excellent thermal and oxidative stability provides reliable operation and extended operating life when compared to mineral oil based products. High corrosion protection for gears. Inherently high viscosity index makes the product suitable for operationsover a wide temperature range.Good water separation and demulsification characteristics reduce down time through prolonged lubricant lifeand increased equipment reliability.PAO base provides good compatibility with seals, paints, and mineral oil based lubricants

Typical CharacteristicsName Method Units CT 320 CISO Viscosity Grade - - 320Appearance Visual - Clear and BrightDensity @ 15°C / 59°F ISO 12185 / ASTM D4052 kg/m³ 853Kinematic Viscosity @ 40°C / 104°F ISO 3104 / ASTM D445 mm²/s 335Kinematic Viscosity @ 100°C / 212°F ISO 3104 / ASTM D445 mm²/s 42.2Viscosity Index ISO 2909 / ASTM D2270 None 182Pour Point ISO 3016 / ASTM D97 °C / °F -45 / -49Flash Point, open cup method ISO 2592 / ASTM D92 °C / °F 240 / 464Foam Sequence I - tendency / stability ISO 6247 / ASTM D892 ml / ml 0 / 0Water Separation @ 82°C / 180°F (40/37/3) ISO 6614 / ASTM D 1401 minutes 20Rust Test - distilled w ater (24 hrs) ISO 7120 / ASTM D665A Rating PassRust Test - synthetic seaw ater (24 hrs) ISO 7120 / ASTM D665B Rating PassCopper Corrosion 3 hrs @120°C / 250°F ISO 2160 / ASTM D130 Rating 1FZG Gear Scuffing Test A/8.3/90 ISO 14635-1 Failure Load Stage >14FZG Micropitting Test @ 90°C/194°F FVA 54-7 / ISO 3660-16 Failure Load Stage/ Micropitting Rating 10 / High