Installation and Alignment
KD2 & KD20 Disc Coupling
KOP-FLEX, INC., P.O. BOX 1696, BALTIMORE MARYLAND 21203, 410-768-2000
KOP-FLEX CANADA, LTD., 19 METEOR DRIVE, REXDALE, ONTARIO, CANADA M9W-1A3, 416-675-7144
Emerson Power Transmission
2.5 Taper Bores Only: A recommended method to measure the hub ad-
vance is to install a split collar on the shaft, away from the hub by the
amount of the specified advance. Use feeler gauges for accurate spac-
ing. See Figure 2. The amount of hub draw is dependent upon the
desired interference and taper angle as specified by the machine manu-
facturer or as given on the coupling drawing. See Figure 3.
Figure 3. Hub Advance vs. Interference Chart
1.0 General Instructions
Prior to installation, inspect the coupling for any signs of damage that may
have occured during shipment. Check that all parts are on hand and are as
ONLY BOLTS AND NUTS SUPPLIED BY
KOP-FLEX ARE TO BE USED.
Components should be cradled or supported during handling to avoid dam-
age and should be wrapped for protection. Flanges and pilot surfaces should
be kept free of nicks and burrs.
Read all of the installation instructions and review the procedure before
the actual coupling installation.
2.0 Installation of Coupling Hubs - Keyed Mounting
2.1 Check the hub bore and shaft for nicks and burrs, dress if necessary.
Make sure that the bore and shaft are clean.
2.2 For tapered bores, check the fit of the bore to the shaft.
2.3 Keys must be precisely fitted to the keyways in the shaft and hub.
Each key should have a tight fit on the sides with a slight clearance on
top. To maintain dynamic balance, the keys should fill the keyways
exactly and not be too short or too long.
2.4 Clean the hub bore and shaft. For straight bores, proceed to step 2.6.
For taper bores, mount the hub handtight on the shaft and lightly rap
it with a soft mallet to establish the initial line-to-line fit. This is the
START position. With a depth gauge, measure the amount the hub
overhangs the shaft end and record this value. See Figure 1.
Because of the possible danger to person(s) or property from accidents which may result from the improper use or unapproved modification of the
product, this product must be installed, maintained, and operated in accordance with the procedures, standards and engineering information
specified in the product brochures and illustrations. To assure safe operation, this product should be inspected in accordance with the instructions
described in this form. Proper guards and other suitable safety devices or procedures as may be desirable, or as may be specified in safety codes,
should be installed by the user. Guards and other safety equipment are not provided, nor are they the responsibility of Emerson Power Transmis-
Figure 1. Measuring Hub Overhang
Figure 2. Using Split Collar to Set Advance
2.6 Heat the hub to expand the bore; DO NOT allow the hub temperature
to exceed 600°F (300°C). DO NOT apply an open flame to any part
of the coupling, an oven is recommended.
To avoid the risk of explosion, fire, or damage to
the coupling and equipment, and/or injury to per-
sonnel, do not use an open flame or oil bath to
expand the hub. If heat is used at any time for in-
stallation, DO NOT allow the hub temperature to
exceed 600°F (300°C).
2.7 Place the hub in the proper position on the shaft. Hold the hub in
place as it cools. For taper bores, verify the hub advance (see Fig-
ures 1 and 2) and install the shaft retaining nut. Remove the split
collar from the shaft
Diametral Taper Rate
.0000 .0005 .0010 .0015 .0020 .0025 .0030 .0035 .0040
High voltage and rotating parts may cause
serious or fatal injury.
Turn off power to install or service.
Operate with guards in place.
Read and follow all instructions in this manual.