Couplings:
Shaft couplings are used for connecting two shafts end for transmitting rotary motion directly from one shaft to another. They act as a one unit and transmit power. The classification of shaft coupling is as below:
A. Rigid couplings
B. Flexible couplings and
C. Loose couplings
(A) Rigid Coupling:
It does not permit any relative rotation between the two shafts i.e two coupled...
What is Engineering Drawing ?
Engineering Drawing is a language to express details of any particular machine part, tool, process of working or assembling and others. Various symbols are used in E.D. to represent factors like- surface roughness, cylindricity, tolerance, diameter, max or min material conditions and other things.
In modern age Engineering Drawing has been replaced by Softwares like Auto...
The main parts of a Lathe Machine are :
- Headstock
- Tailstock
- Carriage
- Cross-slide
- Compound slide
- Bed
- Quick change gearbox
- Legs
- Feed shaft
- Lead screw
The following figure shows the parts of lathe in details ;
Specifications of Lathe Machine :
The maximum diameter of a work that can be held.
The swing over bed. This is the perpendicular distance from the...
These are most commonly used trigonometric ratios ;
Also, these relations need to be remembered,
sin (90° – A) = cos A, cos (90° – A) = sin A,
tan (90° – A) = cot A, cot (90° – A) = tan A,
sec (90° – A) = cosec A, cosec (90° – A) = sec A
Arithmetic Progression ( AP ).
An arithmetic progression is a list of numbers in which each term is
obtained by adding a fixed number to the preceding term except the first
term.
This fixed number is called the common difference of the AP. Remember that
it can be positive, negative or zero.
Examples :
(i) 1, 2, 3, 4, . . .
(ii) 100, 70, 40, 10,...
1. Cutting Speed :
The cutting speed (v) of a tool is the speed at which the metal is removed by the tool from the work piece. In a lathe, it is the peripherical speed of the work past the cutting tool expressed in meters per minute.
Where,
d - is the diameter of the work in mm.
n - is the r.p.m...
The Bogibeel bridge :
The Bogibeel bridge is the longest rail cum road bridge in India having a total length of 4940 meters. It is built on the mighty Brahmaputra river in Assam, 17km away from Dibrugarh town. This is 2 tier bridge having three lane Road on the and top double length broad gauge railway track on the bottom.
The...
The construction of the Pamban bridge which connects Rameshwaram island or the pamban island with mainland India started in February 2020. The reconstructed bridge now has hundreds spans across the sea out of which 99 spans will be of 18.3 meters long and one span will be 72.5 metres long. The new constructed bridge will be 3 meters higher...
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