C
LEAR
P
ATH
U
SER
M
ANUAL
R
EV
.
1.97
96
N
OTES ON
C
G ECTION
Applicat
r
Because
selec
G
T
f
m
e
f
se beam style (helical) couplings if vibration damping
Teknic oft
( any
s
a shed manufacturers such as Ruland.
OUPLIN
A complete coverage of the topic Coupling Selection for Servo
ions is beyond the scope of this document, but many articles and
esources can be found on the web for those interested in learning more.
there are so many different coupling styles and applications,
ting the “right” coupling for a particular application can be
S
EL
challenging.
eneral Guidelines for Coupling Selection
eknic has a few guiding principles when it comes to coupling selection
or servo applications. Keep in mind that these are rules of thumb and
ay not apply to every application. In general:
• Don’t undersize the coupling. Understand how much torque
your application requires and stay within the coupling
manufacturers specifications. Always leave reasonable
engineering margin.
• Don’t use set screw type couplings. They damage the motor
shaft and tend to be less reliable over time than clamp style
couplings.
• Do use clamp style couplings. These clamp around th
circumference of the shaft at one or two points without
deforming the shaft surface.
• Don’t use rigid couplings—they are notoriously intolerant o
misalignments.
• Don’t u
or torsional stiffness is critical to your application. Beam
couplings tend to resonate/whine at higher speeds.
• Don’t use any coupling that requires you to drill into, deform,
or “pin” the motor shaft.
Coupling Recommendation
en recommends zero-backlash curved jaw couplings
commonly referred to as “spider couplings”) as a good choice for m
ervo applications. These couplings are moderately priced and widely
vailable from well establi
Couplings for servo applications
Note: Curved jaw couplings (also known as spider couplings) are a good
choice for many applications, but cannot tolerate a great deal of
misalignment or axial motion. Also, never exceed the manufacturer’s
rating for “maximum torque with zero backlash” when using jaw
couplings.
T
EKNIC
,
I
NC
.
F
AX
(585)784-7460
V
OICE
(585)784-7454
To Next Page
Loading...
General