Sure-Flex Plus couplings are a TB Wood’s original
Sure-Flex Plus couplings utilize EPDM, Neoprene, Hytrel™
and Urethane flexible elastomer sleeves to transmit torque
and accommodate shaft misalignment. Sure-Flex Plus
couplings have exceptional torsional flexibility, with the 4-way
flexing action absorbing virtually all types of shock, vibration,
misalignment and end float. Sure-Flex Plus couplings are an
excellent choice when low cost, high flexibility, low vibration
and easy installation are important.
New! Sure-Flex Plus
For over 50 years, TB Wood’s has led the coupling industry
with the original TB Wood’s Sure-Flex design. And we haven’t
stopped innovating: this industry favorite just got even better.
Our new Sure-Flex Plus EPDM and Neoprene sleeves are
best-in-class for coupling performance and value. Here’s why:
High Torque Rating
• 30% Increased Torque Rating
Sure-Flex Plus sleeves provide longer service life in
demanding applications, reducing required maintenance
and associated replacement cost.
Longer Life
• Sure-Flex Plus Lasts Over 3X Longer than the
Competition
Extensive testing shows our sleeves outlast the imitators.
More uptime means less costly downtime.
Better Value
• Save Money Using a Smaller Coupling
Over 50% of common applications can now use a smaller
coupling, lowering the cost of both coupling purchase and
sleeve replacement.
Interchangeable
• Retrofits to Existing Flanges
No need to replace the full coupling – the Sure-Flex Plus
sleeve design is 100% compatible with the current industry
standard created by TB Wood’s over 50 years ago.
Easy, Quick Installation
Sure-Flex Plus can be installed quickly and easily, thanks
to its simple design with no bolts, gaskets, covers or seals.
Alignment can be checked on the precision-machined
flanges using only a straightedge and calipers. No special
tools are needed for installation, alignment or removal
Features
- Up to 72,480 in.lbs.; 8.20 kNm
- Quick and easy installation
- Spacer, bushed hub, and clamping hub designs in stock
- Flexible design accommodates misalignment and protects
equipment - 7° to 21° torsional wind up
- Needs no lubrication, no maintenance.
No Lubrication, Trouble-Free Operation
The teeth of the sleeve lock into the teeth of the
flanges without clamps or screws, tightening under
torque to provide smooth transmission of power.
Couplings are not affected by abrasives, dirt or
moisture, eliminating the need for lubrication or
maintenance and providing clean, dependable, quiet
performance.
Applications
Sure-Flex Plus couplings can be found hard at work
in many industries. These couplings are ideal for a
wide variety of applications including:
• Pumps
• Fans/Blowers
• Compressors
• Mixers
• Electric Motors
• Conveyors
Sure-Flex Plus 4-Way fiexing action absorbs all types of shock, vibration and misalignment
Torsional
Sure-Flex Plus coupling sleeves
have an exceptional ability to absorb
torsional shock and dampen torsional
vibrations. The EPDM and Neoprene
sleeves wind up approximately 21°
torsionally at their rated torque. Hytrel
sleeves will wind up about 7°
Angular
The unique design of the Sure-Flex Plus
coupling’s teeth allows for the absorption
of angular misalignment without wear.
Refer to page F1-18 for misalignment
limits. Angular alignment can be
achieved using only a scale and calipers.
Parallel
Parallel misalignment is absorbed
without wear or appreciable energy
loss. The lateral flexibility of the coupling
sleeve minimizes radial bearing loads
normally associated with parallel
misalignment. This feature also allows
for easier installation by the use of
components bored for slip fits without
fretting corrosion occurring at the
shaft. Refer to page F1-18 for parallel
misalignment limits. Only a straight-edge
and feeler gage are required for parallel
alignment
Axial
Sure-Flex Plus couplings may be used
in applications with limited axial shaft
movements. The axial compressibility
of the EPDM and Neoprene sleeves
allows for shaft end-float without the
absolute transfer of thrust loads.
Use the Coupling Selector Program on www.TBWoods.com/Select
Or follow these steps:
Sure-Flex Plus couplings are selected as component parts.
- Determine SLEEVE material and type.
Refer to pages F1—4 & 5 - Determine coupling SIZE.
Refer to pages F1—6, 7, & 8 - Determine FLANGES to be used.
Refer to pages F1—9 thru 16.
Specify coupling components.
Example #1 – Close coupled
Size 6, Type S flange w 1-3/8 bore
Size 6, Type S flange w 1” bore
Size 6, Split EPDM sleeve
Example #2 – 5” Between shaft spacer
Size 9, Type SC flange for #11 hub
Size 9, Type SC flange for #9 hub
Size 11 Hub w 2-3/8 bore
Size 9 Short hub w 1-1/8 bore
Size 9 Solid Hytrel sleeve