morse KK User manual

1
F O R M
Installation and Maintenance Instructions for
Models KK, KK-1K - KK-2K, KK-2GD, KK-2GD1K
bore size 15-40 mm Clutch
PS-740-0001
4146-004E
Revised
May 2022
© 2008, 2022 Rexnord Corporation, All Rights Reserved. MCIM22031E • Form# 4146-004E
• Periodic inspections should be performed. Failure to perform proper
maintenance can result in premature product failure and personal injury.
• All electrical work should be performed by qualified personnel and
compliant with local and national electrical codes.
• Read and follow all instructions carefully.
• Disconnect and lock out power before installation and maintenance.
Working on or near energized equipment can result in severe injury.
• Do not operate equipment without guards in place. Exposed
equipment can result in severe injury or death.
• Read and understand the information in this section and in this
manual completely before installing, operating or maintaining this
equipment. Failure to follow this instruction could result in severe
injury or death.
GENERAL SAFETY INSTRUCTIONS
indicates a hazard which, if not avoided, will result in
serious injury or death.
indicates a hazard which, if not avoided, could result in
minor or moderate personal injury.
indicates a hazard which, if not avoided, could result
in serious injury or death.
indicates information considered important, but not hazard-
related (e.g. messages relating to property damage).
Motion Control Solutions
Regal Rexnord
111 W. Michigan Street
Milwaukee, WI 53203
Application Engineering: 800 626 2093
regalrexnord.com/Morse
A. Preinstallation
Position clutch so that overrunning direction is compatible to requirements
of mechanism. Check shaft and bore of housing for correct dimensions
to insure press fit on both I. D. and O. D. of clutch. (n 6 tolerance on shaft
and N 6 for housing bore).
Model No.
Recommended
shaft dia.
(mm)*, (n6)
Recommended housing dia. (mm)*,
(N6)
KK15-1K,
KK15-2GD1K KK15-2K
KK15-1K/KK15-2K/
KK15-2GD1K 15
-0.008
35
-0.012
35
-0.002
-0.028 -0.028 -0.018
KK17-1K/KK17-2K/
KK17-2GD1K 17
-0.008
40
-0.012
40
-0.002
-0.028 -0.028 -0.018
KK20-1K/KK20
-2K/KK20-2GD1K 20
-0.010
47
-0.012
47
-0.003
-0.031 -0.028 -0.022
KK25-1K/KK25-
2K/KK25-2GD1K 25
-0.010
52
-0.014
52
-0.003
-0.031 -0.033 -0.022
KK30-1K/KK30-2K/
KK30-2GD1K 30
-0.010
62
-0.014
62
-0.003
-0.031 -0.033 -0.022
KK35-1K/KK35-2K/
KK35-2GD1K 35
-0.012
72
-0.014
72
-0.006
-0.037 -0.033 -0.025
KK40-1K/KK40-2K/
KK40-2GD1K 40
-0.012
80
-0.014
80
-0.006
-0.037 -0.033 -0.025
*Note: To convert mm to inches, divide by 25.4
Model No. Recommended shaft
dia. (mm)*, (n6)
Recommended housing
dia. (mm)*, (N6)
KK15/KK15-2GD 15
+0.023
35
-0.012
+0.012 -0.028
KK17/KK17-2GD 17
+0.023
40
-0.012
+0.012 -0.028
KK20/KK20-2GD 20
+0.028
47
-0.012
+0.015 -0.028
KK25/KK25-2GD 25
+0.028
52
-0.014
+0.015 -0.033
KK30/KK30-2GD 30
+0.028
62
-0.014
+0.015 -0.033
KK35/KK35-2GD 35
+0.033
72
-0.014
+0.017 -0.033
KK40/KK40-2GD 40
+0.033
80
-0.014
+0.017 -0.033
*Note: To convert mm to inches, divide by 25.4

2
“Regal Rexnord” is not indicative of legal entity.
Morse is a registered trademark of Borg-Warner Corporation, used herein under exclusive license.
Regal Rexnord and Morse are trademarks of Regal Rexnord Corporation or one of its affiliated companies.
© 2008, 2022 Rexnord Corporation, All Rights Reserved. MCIM22031E • Form# 4146-004E
C. After Installation
1. Check clutch for smoothness of operation under overrunning
condition.
D. Lubrication
1. The clutch is prelubricated with grease. If oil lubrication is required,
wash out the clutch with mineral spirits or kerosene before
installation.
2. The following lubricants are recommended:
Oil:
Multi-purpose automatic transmission fluid.
Grease:
+20°F to 125°F (max. ambient temp.). Use premium ball
bearing grease NLGI #1, #2, or ISO 100 or equivalent.
NOTICE: Do not use lubricants of the EP Type (extreme pressure
characteristics) or those containing slippery additives such as
molybdenum disulfide and graphite.
E. Maintenance
1. Periodically inspect clutch for adequacy of lubrication.
NOTICE: Consult Application Engineering at 1-800-626-2093 when
applying this unit as a backstop to prevent reverse rotation of an
induction motor.
F. General Information
1. Application Engineering: 1-800-626-2093.
CAUTION! Do not use the clutch above its torque or speed ratings. Do
not attempt to take this clutch apart.
B. Installation
1. The arrow on the inner race indicates the direction of inner race
engagement.
2. Install to the housing of sprocket, gear, etc.
- For press fit types (KK, KK-1K, KK-2GD, KK-2GD1K); Press outer
race
- For keyed outer race type (KK-2K); Use the key provided to secure
the housing and clutch, because the fit is neither press nor loose.
Then, install ball bearing. Never use a setscrew on outer race to fix
the key because it may deform the outer race.
3. Installation to shaft
- For press fit types (KK, KK-2GD); Press housing (clutch is already
installed) to the shaft by applying force to the inner race of clutch.
- For keyed inner race types (KK-1K, KK-2K, KK-2GD1K); Use the key
provided to install to the shaft.
4. Key and keyway
Standard key and keyway are DIN6885.3. However, the depth of
inner keyways for KK25-1K, KK25-2K and KK25-2GD1K are 0.5mm
shallower than standard. So, the depth of shaft keyway should be
0.5mm deeper. Standard inner race key and keyway for KK40-1K,
KK40-2K and KK40-2GD1K are DIN6885.1.
5. When pressing clutch to the shaft and housing, do not press inner
race or outer race separately but press them simultaneously.
6. Refer to the catalog for key dimensions.
7. The clutch is an integral assembly and cannot be taken apart for
installation. As the torque is transmitted only by friction contact and
the N 6 tolerance for housing bore could under some conditions
produce slight clearance, the application of Loctite Bearing Mount is
recommended. If use of adhesive is not possible, the outer race of
the clutch can be locked into position by axial clamping.
CAUTION! Do not hammer on the clutch assembly during installation
as damage to the ball races can occur. Particular care should always be
taken to make sure that even pressure is applied only to the race with
interference fit.