Sure Flex ®
Sure-Flex flanges (outer metallic parts) and sleeves
(inner elastomeric members) come In many sizes and
types First, determine the size and type of components
being used. Remove all components from their boxes,
and loosely assemble the coupling on any convenient
surface. (Do not attempt to install the wire ring on the
two-piece E or N sleeve at this time) Also check
maximum RPM values in Table 2 against operating
speed. All rubber sleeves (EPDM and Neoprene) have
the same ratings for a given size and may be used
Interchangeably. However, because rubber and Hytrel
sleeves have completely different ratings, they never
should be used interchangeably.
the Type B flange, it may be necessary to expand the
bore by wedging a screwdriver into the saw cut of the
3. Position the flanges on the shafts to approx-
imately achieve the G1 dimension shown In Table 2. It
Is usually best to have an equal length of shaft
extending into each flange. Tighten one flange In its final
position. Refer to Table, 1 for fastener torque values.
Slide the other far enough away to Install the sleeve.
With a two-piece sleeve, do not move the wire ring to its
final position,. allow It to hang loosely In the groove
adjacent to the teeth, as shown.
Inspect all coupling components and remove any
protective coatings or lubricants from bores, mating
surfaces and fasteners Remove any existing burrs, etc
from the shafts.
Slide one coupling flange onto each shaft, using
snug-fitting keys where required. With
Table 1-FASTENER TORQUE VALUES (ft.-lbs.)
Slide the losse flange on the shaft until the sleeve Is
completely seated in the teeth of each flange, (The G1
dimension Is for reference and not critical ) Secure the
flange to the shaft using the torque values from Table 1.