Fixture for Lifting a Motor

Motor as in electric?

Inverted compared to what?

You can make a fixture & use a car engine motor stand.

its an electric motor with the gear box attached to its end and connection box over its body

a forklift ?

But fork lift cant be used to invert the 250kg motor.

put the motor upside down on a pallet, lift pallet with forklift to desired place, mount motor, make electric connections, and done !

no ?

ITS A 250KG WEIGHT AND THE SHOP FLOOR DOESNT HAVE ENOUGH SPACE FOR A FORK LIFT. WE WANT A UNIVERSAL MOTOR HANDLING FIXTURE BY WHICH THE MOTOR CAN BE LIFTED AND ROTATED.CAN U SUGGEST ME ONE.

Sorry, mate. But since this seems to be a specific problem in a specific place/erea, I guess you'll have to depend on your own inventivity ...

Good luck and sorry again ...

Two or possibly three decent chain blocks is the way to go. You can lift with one chain block and then use whatever means you can (use shackle bolts at the very least) to attach a second block that will start to turn the gearmotor the way you want it to go.

Make sure that the hooks are facing the right way so that as the gearmotor rotates to the correct position the hook does not let go. Also place a bucket under each chain block to keep the chains out of the way and stop them becoming tangled with each other.

Good luck and dont stand underneath it!

In the past I have moved much heavier machines in this way.

But chain block is flexible can it withstand the moment created by the lifting force

You might try going to a Auto supply house and get a rotating motor stand. With a few modifications it could replace your motor problem is the are at a fixed height. You will have to modify it or fit it to and engine hoist to make it adjustable. Shouldn't take much effort though.

Construct a bolt-together frame around the motor. Put lifting eyes at appropriate points. Attach lifting frame on the ground, then use chan falls, hoist, etc to lift the motor into the appropriate position. Unbolt the frame and voila!

BUT MR HABIB dkamesh11 said he have a space constrain in on of his replies and he have mentioned that maximum lift to be produced is just 1250mm

Maybe it would help to re-state the problem. Here is my understanding:

1) Need to lift a 300 kg electric motor with gear box and electrical panel attached.

2) The electric motor has a lifting eye suitable for lifting with the motor's shaft horizontal.

3) The motor/gearbox assembly is currently horizontal.

4) The motor/gearbox needs to be installed with the shaft axis vertical.

5) The required lift is 1250 mm.

6) The installation will be in a shop

7) There isn't enough room in the shop to run a forklift

Is this pretty close?

correct u got right

Try using threaded rods from motor plate through the motor mounts and jack the motor unit up using nuts. May be slow way of doing it, but should be safe and even allow you to take the unit down.

but how will u position it when u use thread rods.since it cant be tilted

ok. we need pictures. Is this possible?

The above two motors are to be lifted from ground position and positioned in 90 degrees and 180 degrees .The problem is moment of the motor during positioning while turning.And the two motors havce different diameters

How much clearance do you have and what facilities do you have for making a lift? (Chain hoist, hydraulic jack/ram, manpower, etc...)

Can you build an A-Frame or Tripod? Is there a structural beam you can use for an anchor point? How tight is the space you are trying to put the motor in?

Is the lifting eye shown in your drawing at the center of mass? If so, can you use opposing slings at the center of mass to lift the assembly into the vertical?

ITS LIKE LIFTING UNDER A TABLE AND HEIGHT OF THE TABLE IS 1250 MM WE ARE HAVING A SCISSOR LIFT TO LIFT. WE NEED A FIXTURE TO TILT THE MOTOR IN THE INTIAL STAGE ITSELF AND LIFT IT AND BOLT IT IN THE UNDER SIDE OF THE TABLE LIKE EQUIPMENT.

I'd consider installing a support plate in the motor and/or gearbox mounting faces, to be used as a supplemental lifting point, with some extension and holes that can be used to lift all the stuff. With the eye bolt and two supplemental lifting points you should be able to have it stable around one axis while turning it through the third point.

I understand you do not have much space, but it may be enough to install two supports made by ordinary steel profiles to support the rotating axle geometry, while your regular lifting device turns the motor to the desired position (be sure there's nobody's arms or legs below it...). A third fixed support to be temporarily installed in the assembly can hold it while you are changing your lifting device lifting point.

By your pictures, can you consider separate the motor and the gearbox? Or we must consider the motor details and the assembled schematic as mandatory?

Consider it as a whole unit

Just another point:

You're gonna do it once, or it's supposed to be installed as part of a process?

installed as a part of aprocess.