Introduction, Caution – Nexen 5H30P-E 913005 User Manual
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FORM NO. L-20203-F-1209
EXAMPLE: The required differential engagement speed
using a Model 5H45P-E clutch at 60 psi is 150 RPM
(Clutch rotating at 1250, machine component at 1100).
The referred inertia is 3 Lb. • Ft
2
. The differential RPM limit
for the clutch is:
1.4(10
4
)
N =
= 213 RPM
(60‑22) 3
150 RPM is within the limit of the 5H45P-E operating at
60 psi with a load of 3 Lb. • Ft
2
.
INTRODUCTION
Nexen 5HP-E Multi Position Tooth Clutches are designed
for applications that require a high starting torque without
slipping.
Tooth clutches are normally engaged when stationary. In
certain circumstances, such as low RPM, tooth clutches
can be engaged at differential speeds up to 150 RPM. The
allowable engagement speed depends on the rotational
inertia of the mass being accelerated and the air pressure
applied.
If the tooth clutch is to be engaged in other than static
conditions, solve the following Differential Speed Formula
to make sure the application’s speed is within the limits of
the selected clutch.
DIFFERENTIAL SPEED FORMULA
Use the Differential Speed Formula to find the allowable
engagement speed (N) at a specific air pressure setting (P)
with a given inertia load (WK
2
). This formula expresses the
relationship of the variables involved that effect the impact
of the face teeth during engagement. Tooth damage can
occur when tooth velocity and air pressure settings are
too high (i.e., a smaller clutch has a lower tooth velocity at
any given RPM and a small clutch has less driver inertia).
V(10
4
)
N =
(P‑22) WK
2
Where N = Differential RPM Limit Clutch
V = Constant for Clutch (See Table 1)
P = Operational Pressure P.S.I.
WK
2
= referred Inertia Lb. • Ft
2
CAUTION
If differential speed exceeds the clutch
limitations, ratcheting of the teeth can occur
and shorten clutch life.
Clutch
Constant
Clutch
Constant
5H30P-E
2.10
5H50P-E
1.26
5H35P-E
1.80
5H60P-E
1.05
5H40P-E
1.57
5H80P-E
0.78
5H45P-E
1.40
NOTE
The Differential Speed Formula does not estimate:
• RPM which prevents ratcheting.
• acceleration time.
• tooth stress after engagement.
TABLE 1 CONSTANTS FOR CLUTCHES
- 5H35P-E 913015 5H40P-E 913025 5H45P-E 913035 5H60P-E 913097 5H60P-E 913114 5H50P-E 913045 5H50P-E 913057 5H60P-E 913055 5H60P-E 913065 5H30P-E 913006 5H30P-E 913000 5H30P-E 913115 5H35P-E 913082 5H35P-E 913010 5H40P-E 913020 5H45P-E 913084 5H50P-E 913078 5H45P-E 913089 5H60PSP-E 913081 5H45P-E 913030 5H45P-E 913128 5H50P-E 913091 5H50P-E 913040 5H60P-E 913075 5H50P-E 913069 5H60P-E 913050 5H80P-E 913170 5H80PSE-E 913171 5H30P-E 913008 5H35P-E 913018 5H40P-E 913028 5H45P-E 913038 5H50P-E 913048 5H60P-E 913058