Mobil SHC 634

Approved by

• Flender
• SEW-Eurodrive
• GE

Standards & approvals

• GE D50E32 AC Traction Motor

  Official approval

  GE D50E32 — traction motor lubricant

  General Electric requirement for the lubricant in the gearing of rail electric traction motors.

• AGMA 9005-F16

  ANSI/AGMA 9005-F16 (2016)

  The current edition of the AGMA lubrication practice for enclosed industrial gear drives.

• DIN 51517-3 CLP

  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.

• ISO 12925-1 CKD

  Industrial gear lubricant CKD — ISO 12925

  Class CKD of ISO 12925-1: a gear oil with the same additive package as CKC but greater thermal stability, for gear units running hot.

Specifications

Brand

Mobil (ExxonMobil)

Range

Mobil SHC

Category

Industrial gear oils

Viscosity

ISO VG 460

Manufacturer code

201560500570

Availability

On request

Typical characteristics

Manufacturer's description

Mobil SHC™ 634 is the ISO VG 460 grade of the Mobil SHC™ 600 Series, a range of exceptional-performance, fully synthetic gear and bearing oils built on Mobil SHC synthetic base stock technology, with a kinematic viscosity of 50.7 mm²/s at 100 °C. Formulated to protect equipment, extend oil life and enable trouble-free operation, the range delivers balanced performance across a wide temperature range, with excellent low-temperature fluidity and improved air release in the lower-viscosity grades. The oils resist mechanical shear even in heavily loaded gears and high-shear bearings, so viscosity is retained throughout the oil's service life. Thanks to the low traction coefficient inherent to their synthetic base stocks, Mobil SHC 600 Series oils, including Mobil SHC 634, reduce fluid friction in gears and rolling-element bearings, lowering operating temperatures and cutting power consumption — laboratory testing has shown energy-efficiency gains of up to 3.6% versus mineral reference oils in worm-gear applications. The formulation also provides excellent resistance to oxidation and deposit formation, along with strong rust/corrosion protection, demulsibility, foam control, air release and seal compatibility with mineral-oil-lubricated equipment. Typical applications include filled-for-life and remotely located gearboxes, high-ratio worm gears, low-temperature installations such as ski lifts, mixer and roll-neck bearings, plastic calenders, severe centrifuges and railroad AC traction drives. Mobil SHC 634 holds Flender approval and SEW-Eurodrive approval (Flender approval granted by Siemens AG). It also holds the GE D50E32 AC Traction Motor approval. It meets or exceeds the requirements of AGMA 9005-F16, DIN 51517-3:2018-09 and ISO L-CKD (ISO 12925-1:2018).

Applications

• Recommended for a wide variety of gear and bearing applications where high or low temperatures are encountered, or where conventional lubricants no longer give satisfactory service life.
• Particularly effective where maintenance costs of component replacement, system cleaning and lubricant changes are high.
• Filled-for-life gearboxes, especially high-ratio, low-efficiency worm gears.
• Remotely located gearboxes, where oil change-out is difficult.
• Low-temperature applications, such as ski lifts, where seasonal oil changes can be avoided.
• Mixer roll bearings and roll neck bearings exposed to high temperatures.
• Plastic calenders.
• Severe centrifuge applications, including marine centrifuges.
• Railroad A/C traction drives.
• Mobil SHC 626, 627, 629 and 630 are suitable for oil-flooded rotary screw compressors handling natural gas, field gas gathering, CO2 and other process gases in the natural gas industry.
• Mobil SHC 629, 630, 632, 634, 636 and 639 are approved by Siemens AG for use in Flender gearboxes.
• Before switching a system to Mobil SHC 600 Series, it should be thoroughly cleaned out and flushed, as admixture with mineral oil based products may reduce performance.

Performance & benefits

• Superb high-temperature thermal/oxidation resistance helps extend equipment high-temperature operating capability and reduce maintenance costs, with long oil life.
• Helps minimize deposits, enabling trouble-free operation and long filter life.
• High viscosity index and absence of wax maintain viscosity and film thickness at high temperatures and enable exceptional low-temperature performance, including start-up.
• Low traction coefficient helps reduce friction and increase efficiency in sliding mechanisms such as gearing, with potential for reduced power consumption and lower operating temperatures.
• Helps minimize the effects of micro-slip in rolling contact bearings, potentially extending rolling-element life.
• High load-carrying capability helps protect equipment, extend its life and minimize unexpected downtime.
• Balanced additive combination provides excellent rust and corrosion prevention, water separability, foam control and air release, enabling problem-free operation and reduced operating costs.
• Demonstrated energy-efficiency improvements of up to 3.6% relative to mineral oils, particularly evident in equipment with a high level of mechanical losses, such as high-ratio worm gears.