Instruction Manual
C-24
Installation
Instructions
COUPLINGS
Martin QUADRA-FLEX
®
flanges (hubs) and elastomeric ele-
ments (sleeves) come in a wide range of sizes and types. First,
determine the size and type of coupling components required.
Remove all components from their boxes and loosely assemble
the coupling. Do
not install the wire ring on the two piece
sleeves at this time. Check maximum RPM values in table
against operating speeds.
Martin EM sleeves are rated the same as other EPDM and
Neoprene sleeves, and may be used interchangeably; however,
Hytrel sleeves are rated at different values and may not be inter-
changed with
Martin EM sleeves, or the EPDM and Neoprene
sleeves. Check horsepower and torque ratings when selecting
Hytrel sleeves.
Step 1. Make sure the motor driving the part or components is
locked out electrically in such a manner that it cannot be started
by anyone, however remote from the area. The same type of
lockout procedure applies to any other driving device which may
be used. Failure to follow these instructions may result in per-
sonal injury or property damage.
Step 2. Prepare shafts for coupling installation. Inspect all cou-
pling components and remove any protective coating or lubri-
cants from bores, mating surfaces, and fasteners.
Step 3. Slide one coupling flange onto each prepared shaft
using key stock where required. With the QD Type B flange, it
may be necessary to expand the QD bushing bore for ease of
installation.
Step 4. Position the flange on the shafts to acheive the approxi-
mate “Y” dimension (distance between flanges) shown in table.
It is best to have equal shaft length into each flange. Tighten
one flange in position, and slide the other flange sufficient dis-
tance back to install sleeve. Do not install wire ring on two piece
sleeve in its final position at this time, but allow it to hang loose-
ly in groove next to teeth.
Step 5. Slide loose flange on the shaft until the sleeve has seat-
ed completely in teeth of both flanges. Refer to “Y” dimension
although not a critical dimension. Secure the flange to shaft and
torque set screws and cap screws to correct torque values.
Step 6. Check parallel alignment by placing a straight edge
across the two coupling flanges and measure the maximum off-
set at several points around the periphery of coupling. Do not
rotate coupling when taking these measurements. Refer to
table for maximum allowed offset of parallel alignment. Realign
the coupling if necessary.
Step 7. Check angular alignment with a micrometer, vernier, or
caliper. Take measurement from outside to outside of flanges at
several points around the periphery of coupling. Do not rotate
coupling when taking these measurements. Determine the differ-
ence between maximum and minimum dimensions and check to
make sure they do not exceed the angluar figure on the table. If
a correction is necessary, recheck parallel alignment.
NOTE: Values shown above may apply if the actual torque transmitted is more than
1
⁄4 the coupling rating. For lesser torque, reduce the above values by
1
⁄2.
★ Type H & HS sleeves should not be used as direct replacements for JEM or EM
sleeves.
† Value when using 6J flanges is 2.125.
Step 8. If the coupling employs the two-piece sleeve with wire
ring, install ring in center groove of sleeve.
Note: Some force may be required to seat the ring in groove.
Step 9. Install protective guards and/or shields per OSHA and
any other additional local or state safety codes as required.
WARNING: Coupling sleeves may be forced from coupling
when subjected to a severe shock load or abuse.
Maximum RPM and Allowable Misalignment
(Dimensions in Inches)
3 9200 .010 .035 1.188 — — —
4 7600 .010 .043 1.500 — — —
5 7600 .015 .056 1.938 — — —
6 6000 .015 .070 2.438† .010 .016 2.500
7 5250 .020 .081 2.563 .012 .020 2.625
8 4500 .020 .094 2.938 .015 .025 3.000
9 3750 .025 .109 3.500 .017 .028 3.563
10 3600 .025 .128 4.053 .020 .032 4.125
11 3600 .032 .151 4.875 .022 .037 4.938
12 2800 .032 .175 5.688 .025 .042 5.750
13 2400 .040 .195 6.688 .030 .050 6.688
14 2200 .045 .242 7.750 .035 .060 7.813
16 1500 .062 .330 10.250 — — —
Sleeve Max. Types JEM, EM, E and N ★Type H & HS
Size RPM Parallel Angular Y Parallel Angular Y
Parallel Angular
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