Lifting speeds are largely determined by the application and use. Average speed is generally between 10 and 26 fpm. … By dividing length of lift by lifting speed in feet per minute, you can determine if you have exceeded this rating.
How is lift capacity calculated?
Calculating the Weight of a Load
- Step 1: Determine the Volume of the Load. Rectangle/Square: Volume = Length x Width x Height. …
- Step 2: Determine the Material You’ll Be Lifting. The table below can be used for approximate weight values of common loads and materials: …
- Step 3: Determine the Weight of Object.
How do you calculate lifting torque?
To calculate load torque, multiply the force (F) by the distance away from the rotational axis, which is the radius of the pulley (r). If the mass of the load (blue box) is 20 Newtons, and the radius of the pulley is 5 cm away, then the required torque for the application is 20 N x 0.05 m = 1 Nm.
How is power calculated in an elevator motor?
Let’s say the machine lifts it up at a rate of 1 meter per second. So power needed would be 1000 x 1 = 1kW. But this is the power needed without frictional and other losses. Fairly assuming that the motor and pulley assembly is 80% efficient, actual power the motor pumps in from the source would be 1000/0.8 = 1.25kW.
How is EOT crane lifting capacity calculated?
EOT Crane Design Calculation
- LD Single Girder Overhead Crane. 1.Capacity:1ton-20ton. 2.Span:7.5-31.5m. 3.Max. lifting height:28.5m. …
- LX model double girder overhead crane. 1.Capacity:0.5ton-10ton. 2.Span:3m-16m. 3.Max. lifting height:18m. …
- LDP Single Girder Overhead Crane. 1.Capacity:3ton-16ton. 2.Span:7.5-31.5m. 3.Max.
How do I calculate my load limit?
Working Load Limit (WLL) is the maximum working load designed by the manufacturer. This load represents a force that is much less than that required to make the lifting equipment fail or yield. The WLL is calculated by dividing MBL by a safety factor (SF).
How far can a 30 ton crane reach?
Hydraulic Truck Cranes
Hydraulic trucks range from 30 to 600 ton capacity and feature a hydraulic boom that can reach lengths up to 200 feet.
How much torque is required to move a car?
All Answers (15) The required tractive torque of the motor shall be equal to the tractive torque at wheel, Tw = Ft. rw , (i.e. Tractive Torque = Tractive Force x mean wheel radius). So you must determine the acceleration required to reach you designed speed.
How much weight can a 1 hp motor lift?
This means with 1 hp, you can lift about 550 lbs (250 kg) at a rate of 1 ft/sec, 1100 lbs at a rate of 0.5 ft/sec, 225 lb at a rate of 2 ft/sec, 1 lb at a rate of 550 ft/sec, and so on.
How much can a motor push?
The maximum torque is given as 1.2 kg*cm (which includes the gearbox-transition), which means having wheels with an radius of 1 cm (or 2cm in diameter) will give you a force that is equivalent to 1.2 kg in weight at nominal voltage, as long as your electronics can provide a current of 300 mA (load current).
How much energy does it take to lift 1kg 1m?
On earth it takes about 10 Newton-meters (N-m) of energy to raise a 1 kilogram mass to a height of 1 meter.
Is work done on a person in an elevator?
The elevator has to perform more work in the moment the person is accelerating upwards, but then again less work when stopping at the top, i.e. decelerating. In total, the work performed by the elevator is therefore the same as if the person was standing still the whole time.
What is the efficiency formula?
Efficiency is often measured as the ratio of useful output to total input, which can be expressed with the mathematical formula r=P/C, where P is the amount of useful output (“product”) produced per the amount C (“cost”) of resources consumed.
How do you calculate wheel load?
To calculate the type of wheel and the needed load capacity of the wheel a number of factors and conditions about the application and use of the wheel have to be taking into account. Example: allowable load = 1000kg x 0.75 (continuous running factor) x 0.8 (speed factor) x 0.7 (driving factor) = 420kg.
How do you calculate the speed of an EOT crane?
By dividing length of lift by lifting speed in feet per minute, you can determine if you have exceeded this rating. If there is any doubt, contact CraneTec. On two speed hoists, the slow speed is generally one-fourth the hoist main speed.
What is EOT full form?
From Wikipedia, the free encyclopedia. Electric overhead traveling crane or EOT crane is one of the most common types of overhead crane, also called bridge cranes, which consist of parallel runways with a traveling bridge spanning the gap. EOT cranes are normally powered by electricity.