EOT Crane Design

Sure, why not?

Do you have the rest of the design complete?

rest design for EOT crane, single girder, 3 Ton Capacity is under development stage ...

awaiting for deciding on worm reduction gearbox instead of helical gearbox,

we are also stucked in wire rope drum design ...

require wire rope with 2 reeving(LH&RH) , 6 Mtr lift , wire rope 10 mm Dia ..

we are considering 220 mm Dia , 650 mm long for wire rope drum ....

pl suggest...

If you have to ask strangers to do your design work for you, you should quit now, before you kill someone.

Hire a competent engineer.

Or, is the a class project?

Entire Structural Design (Girder & End-Carriage) is all complete with Duly fabricated ...

confused with worm reduction gearbox work for LT & CT drive instead of Helical Geared Motor ...

Also lookin to purchase Software for Designing Crane but still not find one ...

Guess I misunderstood this: "rest design for EOT crane, single girder, 3 Ton Capacity is under development stage ..."

There is crane design software available in India, it will cost you approx $1000/-.

Why do you ask? Can you think of any possible reason why they should not be used?

Thnx for reply..

Queryin, coz Helical Gearbox is mostly used as standard for EOT cranes..will it bear the torque generated

rarely seen worm reduction gearbox for LT & CT Drives...

our EOT Crane for LT & CT drive is PAM Motor 0.75 kw / 1 HP , 2880 RPM , frame size 100, DC Brakes..

will worm reduction gearbox give the life as that of Helical Gearbox...

pl , suggest worm reduction gearbox with ratio around 28:1 and above motor specs..we are considering bongfigloli make gearbox .. any other can also be considered ...

Dear Mr.Umgagear,

The Drum dia (220 MM) to Rope Dia (10 MM), Ratio is 22 only, this should be 30 or asper IS Code. Ratio of 22 is certainly less. Pl. have a re-look on this Ratio. First you specify the LINEAR SPEED of the Crane, what you require, and from there rework the various rotational speeds in RPM and arrive at the Gear Ratio.

Why you want to use 2880 RPM motor and opt for a Gear Ratio around 28:1. You can as well use 960 RPM Crane Duty Motor, and the Gear Ratio will be brought down to LESS THAN 10:1

Secondly you have asked ".will it bear the torque generated" Certainly the Gear Box will handle the Torque, provided, SELECTION of GEAR BOX IS PROPERLY DONE asper the GEAR MANUFACTURERS SELECTION CRITERIA is strictly followed.

Regarding, the make - as long as the GEAR Manufacturer FOLLOWS THE DEFINED gear standards, there is no problem. In fact for the capacity which you have suggested, there plenty of Gear Manufacturers,you can choose the most competitive one, considering the AFTER SALES SERVICE, commercial aspect etc.

DHAYANANDHAN.S

Dear Mr.Umgagear,

The Drum dia (220 MM) to Rope Dia (10 MM), Ratio is 22 only, this should be 30 or asper IS Code. Ratio of 22 is certainly less. Pl. have a re-look on this Ratio. First you specify the LINEAR SPEED of the Crane, what you require, and from there rework the various rotational speeds in RPM and arrive at the Gear Ratio.

Why you want to use 2880 RPM motor and opt for a Gear Ratio around 28:1. You can as well use 960 RPM Crane Duty Motor, and the Gear Ratio will be brought down to LESS THAN 10:1

Secondly you have asked ".will it bear the torque generated" Certainly the Gear Box will handle the Torque, provided, SELECTION of GEAR BOX IS PROPERLY DONE asper the GEAR MANUFACTURERS SELECTION CRITERIA is strictly followed.

Regarding, the make - as long as the GEAR Manufacturer FOLLOWS THE DEFINED gear standards, there is no problem. In fact for the capacity which you have suggested, there plenty of Gear Manufacturers,you can choose the most competitive one, considering the AFTER SALES SERVICE, commercial aspect etc.

DHAYANANDHAN.S

Sir, Thnx for correcting ... We will re-design the Drum Dia to 250 mm ...

Linear Speed for Both CT & LT Drive is 25 m/min with creep speed 4 m/min , LT & CT wheel Dia 160 mm .. after calculation RPM at LT & CT would be 50 RPM ...

VFD cant be used coz of heavy voltage fluctuation at site,hence for achieving required speed, two Speed Dual wound Motor with 3000 RPM / 500 RPM was being considered,But as procuring Gearbox for 3000 RPM would be bit complicated, we have compromised with 1500 RPM / 500 RPM motor . but for 1 HP motor with frame size 100L we are unable to suit any flange mounted Helical Gearbox hence we are considering to couple with our Motor the Worm Reduction Gearbox with 30:1 Ratio as it being readily available but are worried would worm reduction gearbox sustain the load / torque generated for LT & CT drive ...

pl suggest ...

Re-design, where was the the first design. It appears the first set of numbers were pull from a dark and stinky place

It's too bad that you are incapable of searching the internet. There you could find all the information you need. Instead you want strangers to do your job.

You should not take money for not doing a job you are being paid to do. That's unethical!

Business ethics - Wikipedia, the free encyclopedia

Business Ethics Definition | Investopedia

You can't use it as a holding brake. Check OSHA.

Holding Brake???? can pl provide link for OSHA ...

I am concerned on who is designing this or specifying it.

https://www.osha.gov/pls/oshaweb/owasrch.search_form?p_doc_type=INTERPRETATIONS&p_toc_level=3&p_keyvalue=1910.179&p_status=CURRENT

This thread doesn't concern me NEARLY as much as this: Free Body Diagram of a Payload Fairing.

This loser wants us to specify explosive bolts: "how many bolts and of what size do i need to attach on the lateral and longitudinal separation planes?" With no information!

"what safety factor is used in space industry for fasteners?"

I'm afraid this joker is working in the USA.

:/

I don't even look at half the threads

Dear Mr.umgager,

The answer for your quiery is YES. Worm reduction gear ox can be used. Gear Box Size is to be properly selected by studying the Manufacturer's Selection Chart, AND FOLLOWIG THE GUIDELINES given by the Gear Manufacturer.

DHAYANANDHN.S

"The answer for your quiery is YES. Worm reduction gear ox can be used. Gear Box Size is to be properly selected by studying the Manufacturer's Selection Chart, AND FOLLOWIG THE GUIDELINES given by the Gear Manufacturer.

DHAYANANDHN.S "

Sir, We are considering Worm Reduction Gearbox with Size:-3" ,

Output Torque:- 17.0 kgm , Input hp :- 2.8 .....

Duly Coupled with Our 1hp Motor ...

pl, suggest if the considered Gearbox is suitable for our Application ...

These numbers do not compute; in particular, 17 kg-m torque seems too low for lifting 3 tons at the given drum radius.

Torque 17 Kg-m is for Long Travel & Cross Travel Drive which would be used with1 HP Motor ...
For Lifting 3 Ton, Hoist would be operated with Motor of 12 HP and Triple stage Helical GearBox ...

Too bad that wasn't all distinguished beforehand.

In past worm gear boxes for L.T & C.T were used. So no problem. I suggest you should purchase Wire Rope Hoist of good make instead of designing yourself. Please check following:-

1. Hoist duty is as per your requirement.

2. Hoist trolley should suit I beam you have have selected.

3. Specify your site conditions.

4. You can avoid C.T drive by purchasing Hoist with trolley.