A helical cast steel gear with 30° helix angle has to transmit 35 kW at 2000 r.p.m. If the gear has 25 teeth, find the necessary module, pitch diameters and face width for 20° full depth involute teeth. The static stress for cast steel may be taken as 100 MPa. The face width may be taken as 3 times the normal pitch. The tooth form factor is given by the expression y'=0.154 – 0.912/Tg, where Tg represents the equivalent num- ber of teeth. The velocity factor is given by C, 6+ v where v is the peripheral speed of the gear in m/s.

A helical cast steel gear with 30° helix angle has to transmit 35 kW at 2000 r.p.m. If the gear has 25 teeth, find the necessary module, pitch diameters and face width for 20° full depth involute teeth. The static stress for cast steel may be taken as 100 MPa. The face width may be taken as 3 times the normal pitch. The tooth form factor is given by the expression y'=0.154 – 0.912/Tg, where Tg represents the equivalent num- ber of teeth. The velocity factor is given by C, 6+ v where v is the peripheral speed of the gear in m/s.

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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

A helical cast steel gear with 30° helix angle has to transmit 35
kW at 2000 r.p.m. If the gear has 25 teeth, find the necessary
module, pitch diameters and face width for 20° full depth
involute teeth. The static stress for cast steel may be taken as
100 MPa. The face width may be taken as 3 times the normal
pitch. The tooth form factor is given by the expression
y'=0.154– 0.912/T; , where Tg represents the equivalent num-
ber of teeth. The velocity factor is given by C,
where
6 + v
v is the peripheral speed of the gear in m/s.

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