Rexnord

Omega & Viva

Elastomeric
Couplings

Download the most up-to-date version

at www.rexnord.com/documentation
The Industry Benchmark
Rexnord Omega® and Viva® Couplings are well recognized as the industry benchmark for elastomeric tire
couplings. These non-lubricated, material-flexing split-in-half couplings are used in a variety of demanding
applications. Omega and Viva have an excellent vibration damping capability, helping to extend the life of
your connected equipment. They offer high-misalignment capacity, easy installation, and replace-in-place
design while accommodating a wide range of shaft gaps.

VARIETY OF OPTIONS AND DESIGNS TORQUE-DENSE FLEX ELEMENTS

Omega and Viva Couplings are available in a variety of sizes Omega High Density Yellow (HDY) and Viva are the most
(metric and imperial) and spacing options (close-coupled, torque-dense elastomeric couplings available. They provide
spacer, half-spacer, and extended spacer). These couplings are significantly higher torque capabilities than competitive solu-
also available with anti-corrosive coated steel shoes, stain- tions, allowing for possible coupling downsizing and ultimate-
less steel hardware/hubs, spline bore hubs, keyless/internal ly a lower Total Cost of Ownership (TCO).
locking device hubs, and positive drive with interlocking hubs.
Omega Coupling elements are available in general purpose TIME TESTED, PROVEN & TRUSTED
Standard Orange, High Density Yellow (HDY), and Hydrolyti- PERFORMANCE
cally Stable Urethane (HSU) Green. The Omega and Viva coupling family has been used for over
45 years in a wide assortment of demanding applications and
RESISTANCE TO CHEMICAL & are recognized in industry as the benchmark for elastomeric
ENVIRONMENTAL AGING split-in-half tire couplings.
Omega and Viva’s specially formulated polyurethane pro-
vides superior chemical and environmental aging resistance
as compared to competitive rubber-based solutions.

ATEX II 2GD c T5

Industries:
• Cement & Aggregate
• Paper & Forestry Products
• Construction Machinery
• Metal Processing
• Water & Wastewater
• Material Handling
• General Industrial

Applications:
• Pumps
• Blowers
• Compressors
• Industrial Fans
• Runout Tables
• Mixers
• Chippers & Saws
OMEGA & VIVA COUPLING ASSEMBLY

Polyurethane-to-metal bond minimizes

coupling components and eliminates fretting
wear between the hub and element associated
Anti-corrosive coated steel with jaw and sleeve coupling designs.
shoe and stainless-steel
hardware available with
Omega HSU-J Green.
Radial bolting provides easier
access than axially bolted couplings
in a confined design envelope.

Split-in-half design for easy assembly

and replacement without having to
remove the hubs or realign equipment.

Two rows of radial

holes grant more
spacing adjustability.2

High-misalignment capacity accommodates

unavoidable misalignment with reduced
reactionary forces on connected equipment.
Interchangeable hubs
between closed coupled
and spacer elements allow
for reduced inventory.1 Torsionally-soft, weight-balanced flex
elements cushion shock loads and vibration
to protect connected equipment.
Hubs are not interchangeable between Omega and Viva couplings.
1

Two rows of radial holes only available with Viva couplings.

2

REXNORD OMEGA AND VIVA COUPLING FAMILY

Omega Standard Omega Heavy Duty Omega Hydrolytically Stable

Viva
Orange Yellow (HDY) Urethane Green (HSU)

– General purpose – 25% greater torque – Ideal in hot or humid – The most torque-dense
applications requiring capacity over Omega conditions in addition to acidic elastomeric coupling available
the highest misalignment Standard Orange allows or alkaline environments allows for possible downsizing
capacity for possible downsizing – Anti-corrosive shoe coating – Hubs with two rows of radial
– Available with imperial – Available with imperial available (HSU-J) for use in holes grant more spacing
or metric capscrews or metric capscrews highly caustic environments adjustability
– Available with imperial or – No special hubs or sleeve
metric capscrews extensions needed for extra
wide shaft gaps (up to 300mm)

The Elastomeric Benchmark

for over 45 years!
Allowable Misalignment Torque Ratings
Omega Torque Rating
Omega
Orange Viva
HDY
& HSU (Size)
(Size) (lb-in) (Nm)
(Size)

2 ... ... 190 22

... 2 ... 238 28
PARALLEL
3 ... ... 365 41
... 3 ... 456 51
4 ... 110 550 62
... 4 ... 687 78
5 ... 125 925 105
... 5 ... 1,156 131
10 ... 130 1,450 164
ANGULAR 15 ... ... 1,800 204
... 10 ... 1,812 205
... ... 150 2,210 250
4°
Omega Standard & HSU Sizes 2-15 ... 15 ... 2,250 255
Viva Sizes 110-170
20 ... ... 2,300 260
3°
... ... 170 2,720 308
Omega Standard & HSU Sizes 20-50
... ...
ANGULAR

Viva Sizes 190-290 20 2,875 325

2° 30 ... 190 3,650 412
Omega Standard & HSU Sizes 60-80
Viva Sizes 365-460 ... 30 ... 4,563 515
1° Omega Standard & HSU 40 ... ... 5,500 622
Omega HDY - Sizes 100-140
All Sizes ... ... 215 5,860 662
(yellow box) ... ...
40 6,875 778
0°
0mm .8mm 1.6mm 2.4mm 3.2mm 4mm 4.8mm ... ... 245 8,300 938
0" 1/32" 1/16" 3/32" 1/8" 5/32" 3/16"
50 ... ... 7,650 864
PARALLEL
... 50 ... 9,563 1.080
60 ... 290 12,500 1.412
NOTE: Omega Standard Orange, Omega HSU, and Viva maintain ... ...
60 15,625 1.765
their service life for any combination of parallel and angular
... ... 365 28,320 3.200
misalignment measurements which fall on or below the line of the
70 ... ... 22,125 2.486
respective size. For Omega HDY, permissible misalignment values
are shown in the yellow region and below the corresponding ... 70 ... 27,656 3.108
coupling size dotted line. 80 ... ... 39,500 4.463
... 80 ... 49,375 5.579
Coupling alignment is directly related to smooth, efficient
equipment operation. Care should be taken for best possible ... ... 425 49,380 5.580
alignment. ... ... 460 55,490 6.270
100 ... ... 85,050 9.605
For more product information, refer to the Rexnord Omega ... 100 ... 106,312 12.006
and Viva catalogs located in the documentation section of 120 ... ... 170,100 19.221
www.rexnord.com. ... 120 ... 212,625 24.026
• Omega catalogs: 4000 (imperial) & 4000_M (metric) 140 ... ... 340,200 38.442
... 140 ... 425,250 48.053
• Viva catalog: 4044ENESFR (metric)

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