# Lifting & Holding Power?

## Recommended Posts

Hi guys,

I'm electrical, not mechanical so please excuse me if my question seems a little basic I am looking for advice/guidance on how to calculate maximum lifting and maximum holding capacities (preferably in kg) for a drum style winch with the following details.

Drum diameter - 250mm

Drum shaft diameter - 20mm

Drum speed - 80RPM

Gearbox - approx 70:1 right angle worm box

Motor power 500W 12V DC

Any help would be greatly appreciated.

Thanks & regards,

##### Share on other sites

Hi guys,

I'm electrical, not mechanical so please excuse me if my question seems a little basic I am looking for advice/guidance on how to calculate maximum lifting and maximum holding capacities (preferably in kg) for a drum style winch with the following details.

Drum diameter - 250mm

Drum shaft diameter - 20mm

Drum speed - 80RPM

Gearbox - approx 70:1 right angle worm box

Motor power 500W 12V DC

Any help would be greatly appreciated.

Thanks & regards,

Hi G^2

Q. dc motor - Series or Shunt wound ? Speed/Torque Spec ?

Assume drum is driven at stated drum shaft .... correct ? and is direct coupled to output shaft of gearbox ... correct.

Assume motor is direct connected to input shaft of Gearbox ... correct ?

Kind regards,

##### Share on other sites

Hi G^2

Thank you jO. Looking forward to it. I tried eng-tips also, but didn't get anything useful, unless ofcourse i'm missing the obviuos which could well be the case.

Q. dc motor - Series or Shunt wound ? Speed/Torque Spec ?

The motor in question is a Permanant Magnet DC Motor, however Series Wound Motors are also used on larger winches.

Specific motor details are not available, although speed will be in the order of Drum RPM (80) x GB Ratio (68) or 5440 RPM.

Assume drum is driven at stated drum shaft .... correct ? and is direct coupled to output shaft of gearbox ... correct.

The drum shaft and gearbox shaft are one and the same. The drum shaft extends beyond the drum flange and enters the gearbox which has a hollow shaft. They lock together via a key way.

Assume motor is direct connected to input shaft of Gearbox ... correct ?

Yep, as stated above.

Kind regards,

##### Share on other sites

• 1 month later...

Hi GGOSS

Did you get a good answer to this??

Best regards,

Mark.

##### Share on other sites

Hi GGOSS

Did you get a good answer to this??

Best regards,

Mark.

Unfortunately not Mark.

Regards,

Spiro

## Create an account

Register a new account

• ### Who's Online (See full list)

• There are no registered users currently online
• ### Tell a friend

Love LMPForum? Tell a friend!
×