Answer to Question #326552 in Mechanical Engineering for sahw almutairi

Question

It is required to lift a load of 1.2 tons through a height of 320

mm by using a screw jack under the following condition:

• The available material of the screw is plain carbon steel

which has elastic strength in tension and compression of

200 MPa and in shear 120 MPa respectively.

• The available material of the nut is phosphor-bronze for

which the elastic limit may be taken as 100 MPa in

tension, 90 MPa in compression and 80 MPa in shear.

• The bearing pressure between the nut and the screw is

not to exceed 20 N/mm?.

Design and draw the screw jack. The design should include

the design of:

1) The screw,

2) Nut,

3) Handle and Cup, and

4) Body.

Draw to full scale an isometric and multi-views for the screw

jack.

The design report should include the following:

• Calculation sheet.

• Detail drawing (soft).

• References including material data sheets and used

curves and tables.

• Assume any missing data.

Answer 1

The answer to your question is provided in the image: