Viking Pump NORD TSM For NORDBLOC.1 Reducers - Manual (Page 12)

DRIVESYSTEMS
HELICAL & BEVEL REDUCER LUBRICATION
RETAIN FOR FUTURE USE U10750 - 1 of 2
1. Importance of proper lubrication
Proper gearbox lubrication is essential in order to reduce
friction, heat, and component wear. Lubricants reduce heat
and wear by inserting a protective “fl uid boundary” between
mating parts and preventing direct metal to metal contact.
Lubricants also help prevent corrosion and oxidation, mini-
mize foam, improve heat transfer, optimize reducer effi ciency,
absorb shock loads and reduce noise.
Most NORD reducers are shipped from the factory with a
pre-determined oil fi Il level in accordance to the specifi ed
reducer size and mounting position.
2. Standard oil type
The following tables indicate the standard oil fi ll type used.
Please see user manual U11000 for more specifi c information
and for optional helical and bevel gear lubricants:
Serviceable Gear Units
Helical In-line
Standard Oil Fill:
ISO VG 220, Mineral Oil
Clincher Parallel-Shaft
Right-Angle Bevel
NORDBLOC
® Series In-line
NORDBLOC ® .1 Series In-line
Standard Series In-line
IMPORTANT NOTE
For shipping purposes, the following large Clincher™ gear
units are supplied without oil:
• Clincher™ Sizes SK11282, SK11382 and SK12382
Maintenance-free / Lubricated For Life Gear Units
Clincher™ sizes SK0182NB,
SK0282NB & SK1382NB
Standard Oil Fill:
ISO VG220 SHC/PAO
Synthetic Oil
NORDBLOC ® Sizes SK172,
SK272, SK371F, SK372, SK373,
SK320
IMPORTANT NOTE
Maintenance-free units are supplied as sealed units with no
vent-plug. Consult NORD prior to ordering if interested in
ordering any of the above sizes as serviceable gear units.
IMPORTANT NOTE
Consult the sticker adjacent to the fi ll plug to determine
the type of lubricant installed at the factory. Some units
have special lubricants designed to operate in certain
environments or intended to extend the service life or
service temperature range of the lubricant. If in doubt
about which lubricant is needed for a certain applica-
tion, please contact NORD Gear.
3. Lubrication replacement
If the gear unit is fi lled with mineral oil, the lubricant should
be replaced at least after every 10,000 operating hours or
after every two years. If the gear unit is fi lled with synthetic
oil, the lubricant should be replaced at least after every
20,000 operating hours or after every four years. Often gear
reducers are exposed to extreme ambient conditions, hostile
environments, wet conditions, or dirty and dusty operating
areas. Especially in these situations, it is important to estab-
lish a condition-based oil service interval.
4. Oil viscosity
Viscosity, or the oil’s resistance to shear under load, is often
considered the single most important property of any gear oil.
• Often one will consider making a viscosity correction to
the oil to improve the performance when operating the
gear unit at low temperature or high temperature.
• In cases of extreme load conditions, gear pairs and antifric-
tion bearings may be more susceptible to sliding or scuffi ng
wear. In these operating conditions, it may also be ben-
efi cial to consider an increased lubrication viscosity and/or
a lubrication with improved antiwear additive packages.
IMPORTANT NOTE
The user should consult with their primary lubrication
supplier before considering changes in oil type or viscosity.
5. Maximum oil sump temperature limit
To prevent reducer overheating, the reducer’s maximum oil
sump temperature limit must not be exceeded for prolonged
periods of operation (up to 3 hours continuous operation
depending upon reducer size).
Oil Type Maximum Oil Temperature Limit
NORD
AGMA 9005-D94
Mineral 80-85°C (176-185°F) 95°C (203°F)
Synthetic 105°C (220°F) 107°C (225°F)
IMPORTANT NOTE
Use caution when specifying gear reducers for high tem-
perature service. If there is concern about exceeding the
allowable safe operating temperatures, please consult
NORD to discuss alternatives.
www.nord.com/docs 06.01.11
NORD Gear Corporation
Toll Free in the United States: 888.314.6673
NORD Gear Limited
Toll Free in Canada: 800.668.4378