Lathe Machine 

Taper Turning Attachment

The taper attachment is used for turning and boring tapers. It is bolted to the back of the carriage saddle. In operation, it is connected to the cross-slide so that it moves the cross-slide laterally as the carriage moves longitudinally. This action causes the cutting tool to move at an angle to the axis of the workpiece to produce a taper. The angle of the desired taper is set on the guide bar of the attachment, and the guide bar support is clamped to the lathe bed. Since the cross-slide…

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Lathe Machine 

Methods Of Taper Turning

In ordinary straight turning, the cutting tool moves along a line parallel to the axis of the work, causing the finished job to be the same diameter throughout. However, when cutting a taper, the tool moves at an angle to the axis of the work, producing a taper. Therefore, to turn a taper, the work must either be mounted in a lathe so that the axis upon which it turns is at an angle to the axis of the lathe, or cause the cutting tool to move at an angle…

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Lathe Machine 

What is fiddle-bow lathe?

Fiddle-Bow lathe was used mostly for small work, generally metal work, was called a “fiddle-bow lathe,” on account of the method of driving it. In this lathe, which is shown in the figure below. The same idea of propulsion is used, that of a cord passing around either the piece to be turned or a rotating part of the mechanism by which the piece was revolved. In this case, however, instead of the resistance of the flexible limb of a tree or of a “spring pole” acting to keep the…

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Lathe Machine 

What are the basic principles of wood turning?

It must be noted, however, that although skill can only be acquired by practice, by “making shavings” as the saying goes, it is futile practising unless the basic principles are being applied. The basic principles are comprised of four main elements: The choice of the correct tools The use of properly sharpened tools A good stance The use of correct cutting techniques Consideration must also be given to safety. Safe working habits should become habitual and are as much part of basic principles as the four points covered above. Unsafe…

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Lathe Machine 

How to develop wood turning skill?

In the case of woodturning there is a bit more to it than motor skills because, with the right attitude of mind, it is within the power of the individual to alter the shape of the learning curve. The key to skill is attitude. What does this mean? To begin with it means developing an understanding of the correct basic techniques. If the turner does not get the basics right then, however much he practises, he will not improve. In contrast he may develop a lot of bad practices which…

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Engineering Engineering Drawing General Knowledge Lathe Machine Mechanical Engineering 

How to make a curve?

Turning requires manual dexterity, visual judgement and the co-ordination of hand and eye. In this respect it is similar to games like tennis. Such activities require the development of what psychologists term ‘motor skills’. The learning and development of these skills require relatively long periods of practice. It has been said that it can take seven years, working full-time, for a turner with aptitude to reach the peak of his abilities and become fully skilled. But again this should not deter the beginner. What does ‘fully skilled’ mean? It means…

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Lathe Machine 

The art of woodturning

Woodturning is an art not a science. Each skilled practitioner has his own particular way of doing things. The reason for this is that wood unlike, say, metal or plastic, is not an homogeneous substance. No two pieces of wood are identical even when cut from adjacent positions in the tree. In contrast, consider a piece of steel to be used in a motor car. Numerous metallurgists, and other specialists, will have been employed in the production and testing of the steel, to ensure that it has the required characteristics,…

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Lathe Machine 

GENERAL SAFETY RULES FOR OPERATING MACHINERY

1. KNOW YOUR MACHINE. Read the manual carefully. Learn the machines applications and limitations, as well as the specific potential hazards peculiar to it. 2. KEEP GUARDS IN PLACE and in working order. 3. EARTH ALL MACHINES. If the machine is equipped with three-pin plug, it should be plugged into a three-pin electrical socket. Never remove the earth pin. 4. REMOVE ADJUSTING KEYS AND WRENCHES. 5. KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents. 6. DON’T USE IN DANGEROUS ENVIRONMENT. Don’t use machinery in damp or wet locations,…

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Lathe Machine 

Different Types Keys and Cotters With Images

A machine runs by the power supplied to it by a prime mover such as, motor, engine, etc. The power is transmitted from the prime mover to the machine through a coupler which couples the shafts of the prime mover and the machine. The most commonly employed method to connect a shaft and a part is to drive a small piece of metal, known as key between the shaft and the hole made in the part mounted over it. The key will be driven such that it sits partly into…

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Comparison Between Keys and Cotters

The main difference between keys and cotters are as follows: (a) Keys are driven parallel to the axis whereas cotters are driven perpendicular to the axis. (b) Keys are used in parts subjected to torque whereas cotters are used in parts subjected to tensile or compressive force. (c) Keys resist shear over a longitudinal section whereas cotters resist shear over two transverse sections. Cotter Joints Cotter joints are used to connect together two rods rigidly to transmit power in the length-wise direction. Sometimes when it is required to increase the…

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