Lathe Cutting Speed and Feed Guide
Lathe cutting is done by rotating a material against a tool that has its position controlled by the machine. The lathe is very useful for fabricating parts or features of a part that has a round cross section. The part of the machine that rotates is called the spindle and different attachments can be connected with the spindle such as collets, 3 jaw chucks and centers. An electric motor is used to rotate the spindle by means of a system that is composed of gear trains and belt drives. By changing the angle of the drive train you can control the rotation speed of the spindle.
Different Cutting Tools for the Lathe Machine
In cutting with the lathe, it is essential that you know the different speed for cutting as well as the feeding guide. But before you deal with the cutting and feeding aspect of the machine, it is important that you know of the standard shapes of the cutting tools so that you will have an idea how to use them. A facing tool is for providing clearance in relation to a center point while a roughing tool are made with a tiny relief angle on the side so that it will leave more material for supporting the cutting edge when making deep cuts.
Finishing tools on the other hand have rounded noses with which to give a fine finish. Lighter turns are used with finishing tolls and cutting in both directions is not possible due to the absence of side or back rake. There are also cutting tools that are oriented to the left. These are used for cutting from a left to right direction.
Cutting speed can be defined as the rate in which work progresses in relation with the lathe machine. This is generally measure in feet per minute.
The feeding rate on the other hand can be described as the distance that the tool travels in 1 complete revolution of the part.
Important of the Speed and Feed in a Lathe
Feed and cutting speed is the ones that determine the finish of a surface, the power that is required and the removal rate for the material. The most essential consideration in selecting feed and rate is the kind of material that is to be cut. But you should not neglect the work piece rigidness, the material used on the tool and the condition of the machine. In addition, the depth that should be done on the cut must be considered too. For most of the aluminum alloy materials that you will cut with a roughing tool, you can run it at 600 feet per minute. If you are doing a finishing cut already, run the material at 1,000 feet per minute.
In calculating the right speed for the spindle divide the circumference of the work with the cutting speed that you want. To achieve the finish that is appropriate for you, you can experiment with several feed rates. For the depth of the cut, always bear in mind that for 1/1000 depth of cut, you will be reducing the diameter of the work by 2/1000.