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The lathe machining operation you choose can either save your time and money . . . or make things hard and time-consuming.
If you want to use a lathe machine to shape your workpiece easily, cheaply, and speedily… then you need to know about the most essential types of lathe machine operations.
Lathe Machine Operations
Here are the top 11 lathe machine operations used by thousands of professional machinists all around the world:
Turning
- Taper turning
- Step turning
- Chamfering
- Parallel turning
- Form turning
- Contour turning
Facing
Threading
Grooving
Knurling
Parting
Boring
Reaming
Tapping
Drilling
Sanding
Now let’s discuss each lathe machine operation in brief.
Turning
Turning is a machining operation in which you clamp your workpiece in the lathe chuck and rotate it, and then you shape your workpiece by using a single-point cutting tool attached to the tool post of your lathe machine.
Turning is the most simple and popular type of lathe machine operation. You can perform this operation on wood, metals, and plastics. By using this operation, you can either remove the material from the outside or inside of the workpiece.
Turning is the mother of all the other lathe machine operations. There are six major types of turning operations.
- Taper turning
- Step turning
- Chamfering
- Parallel turning
- Form turning
- Contour turning
Taper turning
Taper turning is a turning operation in which the diameter of workpieces gradually decreases from one end to another end of the workpiece. You can give a workpiece tapered shape by using various types of taper turning methods, such as the form tool method, tailstock set over method, and compound rest method.
Step turning
Step turning is a machining process in which you cut the surface of the workpiece in varying amounts in a single operation.
In step turning, the depth size of each cut is different, and the final shape of the workpiece looks like a staircase.
Chamfering
Chamfering is a machining process of creating small tapered edges, usually at a 45-degree angle.
The chamfering process removes the burrs and sharp edges. Unremoved burrs and sharp edges pose a safety hazard to both workers and end consumers who handle the parts.
You can also use chamfered edges for aesthetic purposes or an easy assembly of two mating parts
Chamfering operation is used in many industries such as woodworking, metalworking, glass cutting, architecture, and CAD.
Parallel turning
Parallel turning is the machining process in which you cut the metal parallel to the axis. It is mostly used to decrease the diameter of the workpiece.
Form turning
Form turning is a machining process used for producing a concave or any irregular shape in a workpiece. Forming tool has cutting edges conforming to the required shape.
Contour turning
Counter-turning operation is used to create irregular profiles by using a CNC lathe. In this operation, the cutting tools move in a predefined contour path, which creates a contour shape.
You can achieve the contour shape in a single pass of the cutting tool. But, machinists prefer to perform numerous passes of cutting tools to create contour shapes in the workpiece.
Facing
The facing is a turning operation used to make the end surface of the workpiece flat and smooth. Almost every lathe machine operator performs a facing operation before any other operation.
Here is the step by step process to perform the facing operation:
First, clamp your workpiece on the lathe chuck, and move your cutting tool near the end surface of the workpiece. Set the depth of cut as per your requirement. Now start the motor and slowly feed the cutting tool inwards.
Threading
Threading is the process of creating a screw thread on workpieces. It is performed by taking successive cuts with a threading tool bit the same shape as the thread form required.
You can use threading operations to cut different threads such as imperial, metric, acme, etc.
Threading operation demands knowledge and expertise. Hence, it should be performed by a skilled machine operator.
Grooving
Generally, you can perform two types of grooves on a lathe machine: OD grooves and ID grooves. You have to use different grooving tools for each operation.
Unlike turning operations, where you cut workpiece in multiple directions, a grooving tool is normally used to cut in a single direction only. Well, of course, there are some exceptions such as relief grooving which takes place at 45°, where the cutting insert angle and the infeed angle must be identical (usually at 45°).
Knurling
Knurling is a manufacturing process where you create a pattern of straight, angled, or crossed lines on the material surface by using a knurling tool.
Knurling allows your hands or fingers to get a better grip on the knurled object than would be provided by the originally smooth metal surface.
Parting off
Parting is a machining operation where you cut your workpiece into two pieces with the help of a thin and long parting tool that looks like a blade.
Sometimes you have a long bar, but you only need a small piece of that bar to make a workpiece. In this situation, the parting operation will be the best option to cut out any size of the piece from the raw bar.
Boring
Boring is a cutting operation where you use a single-point cutting tool or a boring head to produce conical or cylindrical surfaces by enlarging an existing opening in a workpiece.
Boring operation is used to enlarge holes or to cut a tapered hole. The surface formed by this operation is called a bore.
Tapping
Tapping is the process in which you cut threads inside a hole of a workpiece. You can perform this machining operation by using a power feed or hand feed.
Drilling
Drilling is the process of creating a round hole in a workpiece. In lathe machines, this operation is done by using a drill attached to the tailstock or tool post.
While performing drilling operations on lathe machines, if you make a small point on the face of the workpiece with the help of a countersink bit, it will be easier to drill.
Sanding
Sanding is a finishing operation used to enhance the look of the workpiece. It is widely used in the woodworking industry.
Below is the process of performing the sanding operation:
First, clamp your device in the chuck and turn on the motor. Then, set your RPM to between the low to medium range. Now pick an abrasive paper or similar tool and gently rub it on the workpiece surface.
Reaming
Reaming is a finishing operation used to make an accurate and smoother internal surface of a workpiece hole.
It’s a similar operation as boring, but in reaming, you remove a very little amount of material as you would in a boring, and it is performed after the boring operation.
Summary
Okay, so that was all the information you may want to know about the lathe machine operation.
I hope you like it.
Feel free to share this post… and… if you have any questions related to lathe machine operations, then you can ask us simply by commenting on the post
See you in the next post.