Depth of cutCalculator

In conclusion, we aim to ensure precision and productivity in your thread turning operations. If you need assistance using our tools, selecting appropriate tool holders and inserts, or have other questions, our technical support team is ready to help. Contact us at info@smicut.se.

Depth of cutformula

In addition to the above decision-making of cutting conditions, further adjustments are made to determine the optimal priority and balance, such as prioritizing machining accuracy or slightly increasing the machining speed.

Cutting speed represents the speed of cut per minute.In the case of a lathe, rotation is also involved, and it is referred to as the peripheral speed.

Go to our Helix Angle Calculator with Anvil Selector Tool to calculate the exact helix angle and get recommendations for a suitable anvil based on the type of threading insert you are using.

Cutting conditions vary depending on the material of the workpiece and the cutting tool, as well as the desired shape to be cut, and must be adjusted each time these factors change. If the cutting conditions are not appropriate, various disadvantages can arise, such as poor machining accuracy, longer processing times, and tools chipping or wearing out prematurely.

Definecutting speed

In actual machining, further adjustments are required to account for the influence of material properties. Rough estimates suggest that for steel, the influence is 1.5 to 3 times, while for cast iron, it ranges from 3 to 5 times. Additionally, the cutting edge nose radius varies depending on the selected cutting tool.

To achieve optimal cutting properties, the threading insert must be adjusted in the holder to match the thread’s helix angle. This is usually accomplished using anvils (also known as insert shims) that adjust the insert’s angle. Ensuring the correct setup guarantees that the tool operates with maximum efficiency, minimizes the risk of errors, and extends the tool’s lifespan.

This is a phenomenon where fine chips become part of the cutting edge, causing adverse effects on machining accuracy. It is more likely to occur with materials that have high affinity with iron.

Maintaining a balance among the various machining factors while optimizing all of them can be quite challenging. For example, prioritizing machining speed can lead to increased load and vibration on the workpiece and cutting tools, which can in turn affect precision and the lifespan of the tools. Deciding what to prioritize and finding the right balance is a case-by-case matter, and there is no single correct value.

When a workpiece pushes back against the cutting tool during cutting, it’s called cutting resistance. The ratio of cutting resistance to the cutting cross-sectional area is called specific cutting resistance. It varies depending on the material of the workpiece, and approximate values are as follows:

Due to the wide variety of cutting materials, tool materials, and tool shapes, there is no definitive answer regarding cutting conditions. This often leads to confusion and uncertainty, especially for beginners. First, use the recommended values or those set automatically by the system. Verify the accuracy of the machined workpieces, ensure that the machining time is not excessive, evaluate whether the load on the cutting tools is excessive, and make adjustments as necessary. As you gain experience, you will be able to determine cutting conditions smoothly.

The diagram illustrates how FourCut uses the same holder for many different diameters and pitches. This threading tool, which doesn’t require anvils, is a smart and flexible choice because almost all threads can be manufactured with the standard holder.

If the value falls within the blue area (1.5° standard), the anvil that comes with the holder is the most suitable. If it falls outside the blue area, we recommend switching to an appropriate anvil.

However, due to the wide range of factors such as material, shape, and required accuracy, it can be challenging to completely rely on automated settings for all machining tasks.

Many CNC lathes, milling machines, and multitasking machines have built-in cutting conditions tables as internal data and are equipped with systems and software that automatically set appropriate values when materials and types of machining are selected. Additionally, some manufacturers offer apps that can be used on smartphones or tablets for this purpose.

When cutting a new workpiece, if you have machined a similar material and shape, you can make an adjustment based on previous experience.

A major advantage of FourCut inserts is their extra flank clearance. This eliminates the need to precisely match the thread’s helix angle. The standard holder has a preset angle of 2°, allowing almost all threads to be made with the same holder. This offers enormous flexibility and enables the use of the same holder for different helix angles.

Define depth of cutin lathe

The load is calculated based on the current value flowing through the motor. The load value can be used to adjust machining conditions while machining.

For triangular inserts, it’s important that their angle matches the thread’s helix angle. If a lower or higher angle is needed, you can adjust by changing to a suitable anvil.

Depth of cutin milling machine

If the depth of cut is excessive, it can cause vibration due to deflection (chatter). Conversely, if the depth of cut is insufficient, it can lead to surface sliding phenomena (slip phenomenon, rubbing phenomenon).

A solid understanding of the helix angle of a thread is crucial for successful thread turning. The helix angle describes how much the sides of the thread incline. A thread is not a straight groove but a spiral winding around a cylinder. If the angle of the threading insert in the holder is not correctly aligned with the thread’s helix angle, you risk excessive tool wear and defective threads.

When metal is cut using a lathe or milling machine, chips are generated in various forms such as spirals, ribbons and shavings. It’s said that you can tell a lot by looking at the color, shape, length, etc., of the chips.

Select the right anvil based on the threading insert you’re using and the angle you need. In the table, you’ll find the part number to use when ordering. Negative angles on anvils are used when producing a right-hand thread with a left-hand tool or a left-hand thread with a right-hand tool.

To perform machining, a machine tool needs to have specified numerical values for cutting speed, rotation speed, feed rate, and depth of cut, which are referred to as cutting conditions (or machining conditions).

Depth of cutin drilling

Define depth of cutin machining

Depth of cutformula for turning

When using triangular inserts, it’s important that the holder’s setup matches the thread’s helix angle. The standard holder for triangular inserts has a preset angle of 1.5°. If you need to adapt the tool for a different helix angle, you can switch to a suitable anvil to match the thread’s helix angle and ensure optimal machining.

This is the result of combining the above cutting conditions with the cutting resistance to represent the actual power required by the motor.

In a lathe, it represents the number of revolutions the spindle makes per minute, while in a milling machine, it indicates the number of revolutions the cutting tool makes per minute.

If the theoretical surface roughness exceeds the specified tolerance for surface finish, adjustments such as altering the feed rate or switching to cutting tools with larger cutting edge nose radius may be necessary.

Since cutting tool has a large influence, each cutting tool manufacturer lists recommended values in their catalogs. Various materials are available, but those with high hardness and heat resistance can perform high-speed cutting, while those with high toughness are durable and can be used for long machining time.

By consistently performing the best target cutting process from all perspectives, you can achieve high quality machining and reduce man-hours.

Considering the machine condition and its effect on accuracy, the actual value is often set lower than the recommended value.