Page 339 - The Tribology Handbook

Gear and roller chain lubrication C9

AUTOMOTIVE LUBRICANTS ROLLER CHAINS
Type of lubricant: Viscosity grade no. 150 (IS0 3448).
SAE classification of transmission and For slow-moving chains on heavy equipment, bituminous
axle lubricants viscous lubricant or grease can be used. Conditions of

Centistokes Redwood seconds operation determine method of application and topping-
SAE up or change periods. Refer to manufacturer for guidance
0°F - 18°C 2 10°F 99'C 0°F - 18°C 2 10°F 99°C under unusual conditions.
sip
Min. Max. Min. Max. Min. Max. Min Max.
Speed
Method Of limitation
75 - 3250 - - - 13100 - - application Quanti9 Comments
m/s(ft/min)
80 3250* 21 700 - - 13100 87600 - -
Dip < 10 - 1.5~ ROLLER PITCH
90 - -- 14 25 - - 66 107 ( < 2000)
IL
VEL
140 - - 25 43 - - 107 179
250 -- -- 41 - - - 179 -
Slow drip 0-3 5-10 drops/
(0-600) min. @
*
NO~: The min. viscosity at 0°F may be waived if the viscosity is APPLIED TO
not less than 7 cSt at 210°F. Fast drip 3-75 > 20 IN-GOING SIDE
(600-1500) OF CHAIN
Spray > 7.5 Depends
These values are approximate and are given for information only. (> 1500) upon speed P
and other DRIVEN
Selection of lubricants for conditions FROM CHAIN
ATELY OR
transmissions and axles SPROCKET
Almost invariably dip-splash.
The modern tendency is towards universal multipurpose OPEN GEARS
oil. Applies to large, slow-running gears without oil-tight
housings.
Rear axles
Manual Automatic Rear axles (spiral
gear boxes gear boxes (hypoidr) bevel and Requirements of Type.r of lubricant Methods of
application
worn) lubricant
Cars SAE;80 (EP) Automatic Highly Must form protective Generally bituminous Hand, brush,
or multi- transrnis- active film and tacky. paddle
purpose sjon fluid SAE 90 Sometimes cut back Dip-shallow
(ATF) EP or Must not be squeezed by volatile diluent P"'
multi- out Can use grease or Drip-automatic
purpose heavy EP oils Spray-
Must not be thrown continuous or
Heavy SAE, 80 EP SAE80EP - SAE 140 Off intermittent
vehicles or SAE 90 for semi- or ~
(EP) or auto- multi- Must be suitable for
multi- matics pur- prevailing ambient
purpose ATF fluid pose conditions
for autos

Above only to be used where supplier's recommenda-
tions are not available. Viscosity ofopen gear lubricant CS at 38"C( 1OO"fl
Above are suitable for normal conditions. In cold 7emperature sprclv Drip
conditions (< 0°C) use one SAE grade less. In hot "C
conditions (> 40°C) use one SAE grade higher. Residual
In most cases (except hypoids), straight oils are accept- Mild EP oil comPOund Mild EP oil
able. The above EPs are given for safety if supplier's
recommendations are not known. -10 to 15 - 200-650 -
Some synthetic (polyglycol) oils are very successful with
worm gears. They must not be mixed with any other 5 to 35 100-120 65C2000 1w120
oils. ATF fluids must not be mixed with others.
Change periods: (only if manufacturer's recommenda- 25 to 50 18CL2QQ 65&2000 18CL200
tions not lmown). Rear axles-do not change. Top up
as required. All manual and automatic gearboxes-
change after 20000 miles. Before that top up as required.
C9.2