Stober 1 Servo Gear Units

Gearhead Sizing to your Specific Application Requirements
Sizing/Selection
Use the chart on the facing page and
below to determine the best series and
the right size gearhead to meet your
specific application requirements. In
each product section of this catalog,
the necessary data and a ”Load/Life/
Speed Calculation” section are provided
to help you work through these
equations..
By all means, please feel free to call or
email (sales@stober.com), if you have any
questions or need assistance determining
the best solution for your application.
1
2
3
4
Select Preliminary Reducer Size
Determine the Permissible
Acceleration Output Torque (M 2B )
M 2b < M 2B
M 2e < M 2N / f B /f L
YES
Determine the Reducer Ratio (i)
n im < n 1MAXDB/fT
n imax < n 1MAXZB/fT
YES
Determine the Peak Torque (T 2peak )
M 2peak < M 2PEAK
NO
NO
NO
Cycle Run
Torque
n
n b , n v
M 2e = 3
t b t d t v t p t
M
M 2e M 2b t
n 2b • tb • M 2b
3 + . . . . + n 2n • t n • M 2n
3
∆ n
M 2b = J z + M L
9.55 x ∆ t
Select a Larger Reducer
Select a Smaller Ratio
(and larger motor,
if needed)
Select a Larger Reducer
(
n 2b • t b + . . . . + n 2n • t n
(
Service Factor
Apply to Nominal Rating ONLY
Load Factor f B
Operating Mode
Continuous
Cyclic
Cyclic–
Reversing
Running Time Factor f L
≤8 hours
≤16 hours
≤24 hours
Apply to Input RPM
Temperature Factor f T