Resistance of teeth for 10 ton lift 1

[ricec]

COULD SOMEONE TELL ME IF AN ARRANGEMENT OF A DP 3 INVOLUTE 14 1/2 DEGREES GEAR WITH 106 TEETH AND A PINION OF 22 TEETH WOULD RESIST WORKING WITH A LOAD OF 10 TON. THE WIDTH OF THE GEAR IS 4 INCHES.
THIS GEAR WOULD ROTATE A DRUM FOR LIFTING.
THANKS IN ADVANCE...

 

[paulliu]

If you tell the torque applied to either the gear or pinion, I can give an estimate based on calculation.

 

[diamondjim]

You would have a stress level of
51400psi using the Lewis equation
for strength assuming no load
sharing ie single tooth loading.

You would probably need a BHN level
of 300 min. core hardness to achieve
that on the pinion assuming you are
using an alloy steel.

Really curious why you would use such
a low pressure angle for this heavy
duty gear and pinion?

 

[ricec]

The torque applied on the pinion is going tobe a maximun of 6000 lbs./ft. at 7.5 rpm.
The use of this type of gear is because we have the winch and we are trying to use it in this job.

 

[paulliu]

I've run through a rating process. The answer is
yes if the gears are at least through-hardened-heat- treated, and expect to run 300 hours, with AGMA Quality
Q9.

Warning: I am not liable to my estimate. More detailed
and rigorous analysis are required if you really decided
to use them lift 10 ton goods.

 

[unclesyd]

If you are rerating a lifting device I would check with your local jurisdiction to see if this an option without the OEM getting involved.
With most lifting devices it is not permissible nor sound engineering to use to the built-in safety factor for additional capacity.

 

[tbuelna]

unclesyd is correct. Here in the US, OSHA typically requires a FOS of 5.0 (by analysis) for overhead lifting devices.