Types of metal cutting saws

Different types of cutting saws

Advantages of a horizontal band saw

Different types of cutting saws

Metal cutting saws of different types are used in industries. The most commonly used are the

Power saw

Horizontal band saw

circular saw

Contour saw

Power saw

This is the most commonly used metal cutting saw.

Horizontal band saw

This has a saw frame on which a motor is  fitted. There are two pulley wheeels on which an endless band saw passes.

Speed variation is obtained through the stepped pulleys on the motor.

The roller guide brackets provides the rigidity for the blade in the cutting area and also prevent wandering of the blade while cutting.

The blade tension is maintained by using the adjusting handle, provided for this purpose.

A vice is provided for holding the metal stocks. The vice is adjustable for angular cutting.

The machine has the advantage of continuous cutting ability, and is much faster than a power saw. It may be noted that a power saw cuts only in every alternate stroke.

Circular saw

This type of cutting machine is used  when cutting materials have a large cross section. The circular saw has a continuous cutting action and is economical in production work where heavy section metals are used.

Contour saw

In this a metal band saw blade is used, and the contour saw has a continuous cutting motion.

These machines are very much used for cutting metals to different profiles.

Different speeds can be obtained while cutting, with the help of variable speed pulleys.

For repairing broken countour saw blades, these machines are fitted with a  shear for trimming the blade ends, a but welding machine for joining the ends and the small grinder to finish the welded joint.

The table can be tilted t any angle for angular cutting. The blades passes through a guide which prevents the blades from wandering and keep it rigidity.

These machines are widely used for tool room work, and not as a machine for cutting raw material stock.

Precautions while machine sawing

In order to work safely and efficiently, certain precautions are to be obserened.

While taking measurements of the work for setting,always stop machine.

Projecting ends of the work should be well guarded, so that safety may be provided to others.

Ensure that the work does not protrude into the gangways.

When sawing thin pieces, hold the material flat in the vice to prevent the saw teeth from breaking.

Ensure a cutting fluid is used always.

Avoid giving excessive cutting pressure, because this can cause breakage to the blade, and cut work out of square.

When several pieces of the same length are to be cut, use a stop gauge

When holding short workpiece in a vice, be sure to place a short piece of the same thickness in the opposit end. This will prevent the vice from twisting when it is tight ened