The V-ring is an all-rubber seal available from SKF. It ismounted directly on the shaft by hand and seals against acounterface. This unique design has been extensively used
on a broad range of applications.Designed with a long, flexible lip, the V-ring can act asa face seal, a lip seal or slinger. The construction is threepart: the body (a), the conical self-adjusting lip (b) and the
hinge (c). The elastic body holds itself in place on the
rotating shaft while dynamic sealing takes place where the
lip is in axial contact with the counterface. The counterface
should be metal and can be the end of a gearbox housing,
a washer, a suitable steel stamping, even the back of an oil
seal. Generally no seal bore is required and no shaft
preparation is needed.In addition to highly effective contaminant exclusion, V-rings can be used to retain grease lubricants. However,
with proper countersurface preparation they can run dry
with very low torque loss and good service life.Because the V-ring is very elastic (smaller V-rings canbe stretched up to 2 >
1 / >
2 times their free diameter) it canoften be easily fitted to shafts without disassembly of the
uniteven over flanges, pillow blocks, or other assemblies.One size V-ring can be used on a number of shaft sizeseither English or metric dimension. Less than 142 sizes
covers a wide range of shaft sizes from .110" (2.7mm) to 29'
(9000mm). Sizes up to 79.530" (2020mm) and beyond are
available in nitrile or fluoroelastomer (Viton װ F to 212 F (nitrile) and -15 а F to 392 F fluoroelastomer.In addition, special constructions and sizes can be made toorder including split versions.There are six styles of V-rings.VR1VR1VR1VR1VR1 The most common style available in the widest range ofsizes from .110" (2.7mm) shaft to 79.530" (2020mm) nitrile
and fluoroelastomer. Ideal for protecting gearboxes, electric
motors and drives.VR2VR2VR2VR2VR2 The original V-ring designed with a wide body andtapered heel to firmly hold the ring on the shaft. Available in
sizes from .180" (4.5mm) shaft to 8.270" (210mm).
Commonly used in agricultural and automotive applications.VR3VR3VR3VR3VR3 Very compact axial cross-section commonly used inconfined spaces to replace labyrinth seals. Available in nitrile
and fluoroelastomer for shaft sizes from 4.134" (105mm)
shaft to 78.745" (2000mm) and beyond.
VR4VR4VR4VR4VR4 A heavy-duty large diameter style commonly used inrolling mills as a secondary seal for heavy duty applications
where the primary seal has to be protected against water and
or particulate contamination. VR4 is the preferred heavy duty
V-ring in replacement applications. Selected sizes are in stock
and others can be made to order. For new designs, the VR6
should be considered and has similar mounting dimensions.
Available in both nitrile and fluoroelastomer for shafts from
11.811" (300mm) to over 78" (2000mm).VR5VR5VR5VR5VR5 A heavy-duty large diameter style designed to operate inthe severe conditions found in metals and paper mills. The
unique body profile can accommodate radial and axial support
in high shaft speeds applications. It has an extension that can
be fitted into mechanical components or trimmed to length to
meet existing space requirements (contact SKF for details).
Available for shaft diameters from 11.811" (300mm) to over
78" (2000mm) in nitrile and fluoroelastomer on a made-to-
order basis.VR6VR6VR6VR6VR6 This heavy-duty profile is also designed primarily forprotecting high speed bearing arrangements in rolling mills,
papermaking and large machine applications. It should
especially be considered for new equipment designs. The
shape is similar to the VR5 except it does not have the
extension to the rear of the body section, allowing a narrower >
Ю ) covering a widevariety of media compatibility in temperature ranges from
1 . It does retain the saddle feature for axial and radiallocation on the shaft with a specially designed clamping band.The key installation dimensions are the same as the VR4
except for the body height. Available on a made to order basis
in both nitrile and fluoroelastomer for shafts from 11.811"
(300mm) to over 78" (2000mm). Contact SKF Sealing
Solutions for specific size and installation data. >
V-Ring permits considerable misalignment. Can be used on oval or eccentric shafts. For cross sectional drawings, please see page 4. >
Note: Beyond the six primary V-ring styles and rubber
compounds, options are available for special installation
dimensions and operating conditions (ie. confined spaces,
exposure to caustic fluids). Many V-ring profiles can be
ordered for shaft diameters beyond 78.740" (2000mm).
Contact SKF Sealing Solutions for details.
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