Bonfiglioli 300 NEMA - DS TECH

(450) 655-7447
info@pt-dstech.com
www.dstech.ca
1275 Newton, local 15
Boucherville, Qc,
Canada, J4B 5H2
NOTE:
The selection criteria and specifications reported in this catalogue are not valid for every
and each application, including those where the gearbox operates as a safety device preventing
injury to persons or damage to objects, as is the case with hoisting equipment.
For these applications, the gearbox should be selected according to specific criteria and in
compliance with the applicable safety regulations. Should this be the case we recommend
that you seek advice from BONFIGLIOLI Technical Service.
Selecting a gearbox
Examine the application and establish:
a) service factor « S.F. » according to type of duty, number of starts per hour and expected lifetime
(tab. A4);
b) Determine calculated torque according to required output torque « M r2 » as follows:
T c2 T r2 S.F. (7)
c) Determine gear ratio from required output speed « n 2 » and drive speed « n 1 »:
n1
i (8)
n
2
d) Once « T c2 » and « i » are determined, locate the gearbox rating chart for the drive speed « n 1 »
and select a gearbox featuring the gear ratio « i » nearest to calculated ratio that also satisfies
the condition:
T n2 T c2
(9)
If a motor is to be fitted to the gearbox, check availability of the relevant adapter.
The combination of large, heavy weight, motors with single reduction units of sizes 300 to
307 in the FP configuration, may result into a reduced theoretical lifetime for the gearbox.
Should this be your case, kindly contact the local Bonfiglioli Technical Service for directions.
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