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Working principle of a slotter machine and its machanism

The working of slotter machines are quite interesting with the fact that one need be skillful before using them. Machine is of different types so as their working mechanism which we’ll also look after.

Today we’ll be looking at the working principle of a slotter machine and the various mechanism they feature.

types of slotting machine

The working of a slotter machine:

The working of slotter machine is very similar with the shaper machine. Their major difference is that shaper machines works horizontally whereas slotter machines work vertically. The ram is connected to the crank and the crank is connected to the gears. This allows the increase or decrease of the gear speed and take effect on the rotation of crank speed. It also allows the ram to move up and down.

Read: Everything thing you need to know about slotter machine

The workpiece is attached to the workable and the ram will be manually taking to the workpiece. The worktable is design to be adjusted and have the workpiece clamp on it.  the crank rotates as soon as power is supply the machine and the crank is connected to the ram which moves up and down.

During the up and down movement of the ram, the cutting stroke occurs in the up stroke and there is no cut in the return stroke.

The video content below contain the working of a slotter machine, creating an internal keyway:


The mechanism of slotting machine can be available in two forms which include:

Hydraulic drive:

In this mechanism, a speed motor is drive by a hydraulic pump which delivers oil at a constant pressure to the line. It also contains a regulating valve that pushes oil under pressure to each end on the piston alternately and allows oil from the opposite end of the piston to return to the reservoir. The piston pushed is connected to ram by piston rod as the ram is carries the cutting tool. Trip dogs and pilot valves aid the distribution of oil to each end of the piston.

The ram moves a complete stroke (forward and return) by a trip dog which will trip the pilot valve that operates the regulating valve. The regulating valve will push the oil to the other side of the piston and the motion of the ram will reversed.  The ram stroke length will depend upon the position of the trip dogs which can be changed. This is done by unclamping and moving the trip dogs to the desired position.

Read: The working of a planer machine and operations performed on it

Variable speed motor drive:

Slotter machine with this mechanism, the speed is obtained by different gear present in the gearbox whilst, the shaft rotates with the aid of an electric motor. It is basically used in modern large slotting machines.

that’s it for this article, working principle of a slotter machine. I hope the knowledge is attain, if so, kindly comment, share and check some other interesting topics below. Thanks!

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