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Product Data Sheet Mobilgear 600 Series
Heavy Duty Industrial Gear Lubricants
Product Deion
Mobilgear 600 Series oils are a range of premium quality heavy duty industrial gear lubricants made from
solvent refined high quality paraffinic mineral oils and an unleaded load carrying additive. They also contain
oxidation, rust, foam and emulsion inhibiting additives.
Available in seven viscosities they are branded Mobilgear 626, 627, 629, 630, 632, 634 and 636.
Benefits
Mobilgear 600 Series oils offer the following benefits:
· Longer oil life resulting from reduced oxidation and oil degradation - and lower bulk oil temperatures
· Reduced tooth wear due to excellent load carrying properties
· Increased protection against rust and copper and bearing metal corrosion
· Good lubrication in presence of water due to marked resistance to emulsion formation and marked
resistance to foaming
· Smaller gear cases can be used for given transmission loads
· Reduced power consumption due to lower coefficient of friction
· Reduced inventories due to wide range of application
· Lead free additive technology reduces health and environmental hazards
· Reduced maintenance and repair costs give improved operating profit
Applications
Mobilgear 600 Series oils are recommended for industrial enclosed gears with circulation or splash lubrication
operating at bulk oil temperatures up to 110°C. Minimum bulk oil temperatures are governed by the Pour Point.
These oils can also be mixed satisfactorily, but a suitable heater will be necessary for the heavier grades at
ambient temperature and also for the lighter ones below 18°C.
Non-gear applications for Mobilgear 600 Series oils include shaft couplings, screws and heavily loaded plain
bearings operating at slow speeds.
Note: For worm gears operating at bulk oil temperatures above 95°C - Mobil Glygoyle or Mobil SHC 600 Series
products should be used.
Properties
Mobilgear 600 Series oils have outstanding load carrying properties - extreme pressure characteristics and
resistance to metallic wear. They all have a Timken pass load of 65 lbs.
These oils possess an extremely high level of resistance to oxidation and chemical degradation to keep gear
cases, reservoirs and circulation syst free from sludge and deposits even at high bulk oil temperatures.
This gives very long service life. They have friction modifying characteristics which reduce power consumption
and lower bulk oil temperatures to reduce oxidation further.
Mobilgear 600 Series oils protect against copper corrosion and rusting in both liquid and vapour phases. Their
water separating properties are excellent and they strongly resist foaming in service.
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Health and Safety
Based on available toxicological information, it has been determined that this product poses no significant
health risk when used and handled properly.
Details on handling, as well as health and safety information, can be found in the Material Safety Data Bulletin
which can be obtained through Mobil Oil Company Ltd., by telephoning 01372 22 2000.
Typical physical characteristics are given in the table. These are intended as a guide to industry and are not
necessarily manufacturing or marketing specifications.
Product Characteristics
Mobilgear 626 627 629 630 632 634 636
ISO Viscosity Grade 68 100 150 220 320 460 680
Viscosity, cSt at 40 oC 68 100 150 220 320 460 680
Viscosity, cSt at 100 oC 8.5 11.2 14.2 18.1 23.0 28.5 34.7
Viscosity Index 91 91 91 91 91 98 83
Pour Point, oC -24 -24 -21 -18 -12 -6 -6
Flash Point, oC COC 204 208 210 216 232 232 232
Due to continual product research and development, the information contained herein is subject to change without notice
Mobil Oil Company Limited
Acting as Agent for Mobil Lubricants UK Limited
ExxonMobil House, Ermyn Way
Leatherhead, Surrey, KT22 8UX
Telephone: 01372 22 2000
