Installation and Maintenance
•
Falk
®
Double Engagement Gear Couplings
(Page 2 of 6) Type GL20 • Sizes1010 thru 1070
458-710 Rexnord, 5555 S. Moorland Rd., New Berlin, WI 53151-7953 USA
March 2014 Telephone: 262-796-4060 Fax: 262-796-4064
Supersedes 7-01 www.rexnord.com
General Purpose Grease
Bi-annual Lubrication — The following specifications
and lubricants for general purpose grease apply to gear
couplings that are lubricated bi-annually and operate within
ambient temperatures of –30°F (–34°C) to 200°F (93°C).
For temperatures beyond this range, consult the Factory. For
normal service, use a NLGI #1 extreme pressure (EP) grease
EXCEPT when the coupling speed is less than the minimum
specified in Table 1, Page 5. At these lower speeds, use a
NLGI #0 extreme pressure (EP) grease. When one or more
gear couplings in an application require NLGI #0 grease, the
same grease may be used in all of the couplings. DO NOT use
cup grease.
If coupling leaks grease, is exposed to extreme temperatures,
excessive moisture or experiences frequent reversals or axial
movements; more frequent lubrication may be required.
Specifications — General Purpose
Coupling Lubricants
COUPLING SPEED RANGE — See Table 1.
TEMPERATURE RANGE — –30°F to + 200°F(–34°C TO 93°C).
WORKED PENETRATION AT 77°F(25°C) —
NLGI #1 . . . . . . . . . 310-340
NLGI #0 . . . . . . . . . 355-385
DROPPING POINT — 300°F (149°C) or higher.
TEXTURE — Smooth or fibrous.
MINIMUM TIMKEN O.K. LOAD — 30 lb.
SEPARATION AND RESISTANCE — Low oil separation rate and
high resistance to separation from centrifuging.
LIQUID CONSTITUENT — Possess good lubricating properties
. . . equivalent to a high quality, well refined petroleum oil with
EP additives.
INACTIVE — Must not corrode steel or cause swelling or
deterioration of synthetic seals.
Oil Lubrication
EP oils may be a more effective lubricant than grease when
the required coupling speed is one half of the minimum speed
range of NLGI #1 grease listed in Table 1 (Minimum rpm
÷ 2). Oil lubricated couplings must be sealed to prevent
leakage, i.e. keyways, etc. Couplings must be drained and
refilled with new oil every six months for operating temperatures
up to 160°F (71°C) and every three months for couplings
operating at temperatures of 160°F (71°C) up to 200°F (93°C).
For temperatures beyond this range, consult the Factory. The
minimum operating temperature must not be lower than the
pour point of the oil. The specified amount of grease listed in
Table 1, Page 5, in pounds and kilograms and also applies to
the volume of oil in pints.
Specifications
Type: Mild EP gear oil that meets AGMA
Specifications 250.04.
Grade: AGMA #8EP (ISO VG 680).
Viscosity: 612-748 cSt @ 104°F (40°C).
Pour Point: 20°F (–7°C) Maximum.
Must not corrode steel or swell or deteriorate synthetic seals.
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