Lathe vs. Mill: What’s the Difference? (2024)

Wondering when to use a lathe vs mill? Whether you recently picked up a wood-turning hobby or run a metal shop in your community, you likely rely on a lathe or a mill to get the job done. These machines cut metal, wood, and plastic into desired shapes.

If you’re experiencing unexpected downtime and a decrease in productivity, it’s probably because your utility power supply isn’t providing the uninterrupted flow of electricity you need. Check out the guide below to learn more about how lathes and mills work and how a phase converter can benefit your projects.

Table of Contents

  • What Is a Lathe?
    • Types of Lathes
    • When to Use a Lathe
  • What Is a Mill?
    • Types of Milling Machines
    • When to Use a Milling Machine
  • Lathe vs. Mill
  • Why Power Supply Matters for Lathing and Milling

    What Is A Lathe?

    A lathe is a machine that cuts materials like wood, metal, and plastic into desired shapes by spinning the workpiece in a circular motion at a high speed. The workpiece is secured with a spindle, which rotates it, and the cutting tool operates from a fixed position.

    Types of Lathes

    1. Wood Lathe: A wood lathe is designed exclusively to cut and shape wood. It’s a manual machine, so the operator holds and guides the cutting tool.
    2. Metal Lathe: Although ideal for cutting metal, a metal lathe can also be used to cut wood and plastic. This machine operates automatically, with the tool post holding and guiding the cutting tool.

    When to Use a Lathe

    Lathes are ideal for cutting cylindrical and symmetrical workpieces. They also work well forjobs involving turning, like wood turning projects, which removes excess material from the perimeter or inside of a wooden workpiece.

    Here are some additional lathe applications:

    • Cutting
    • Core facing
    • Threading
    • Boring
    • Creating grooves, threads, and tapers
    • Drilling center holes on turned pieces
    Lathe vs. Mill: What’s the Difference? (1)

      What Is a Mill?

      Like a lathe, a mill cuts and shapes metal and wooden materials. It does so by moving the workpiece along an axis that runs perpendicular to the spindle and against a cutting tool that rotates. First you have to determine what shape you want to make, mark reference points, and choose the right cutting tool for the job. Once put in place, the cutting tool removes excess material from the workpiece to create the shape.

      Types of Milling Machines

      When it comes to milling machines, you have various options to choose from based on your project specifications. Here are some of the most common types of milling machines:

      • Knee and column milling machines
      • Vertical
      • Horizontal
      • Universal
      • Fixed bed/manufacturing milling machines
      • Plano millers
      • CNC milling machines

      When to Use a Milling Machine

      While a lathe is designed to cut and shape cylindrical or symmetrical workpieces, a mill is designed to shape flat and curved surfaces. Common applications include the following:

      • Boring holes
      • Cutting slots
      • Shaping intricate part geometries
      • Drilling
      • Sanding
      • Engraving
      Lathe vs. Mill: What’s the Difference? (2)

        Lathe vs. Mill

        Lathes and mills perform similar functions in different ways. They both remove material from a workpiece to create certain shapes and designs but have different ways of achieving this goal.

        For example, the cutting tool on a lathe remains fixed while the workpiece rotates. On a mill, however, the workpiece is fixed and the cutting tool rotates. The cutting tool—also known as the spindle—can be raised and lowered to accommodate the size of the workpiece.

        Why Power Supply Matters for Lathing and Milling

        Most lathes and mills require a power source that can accommodate their high voltage. It’s important to consider how to power lathing and milling equipment because the power source directly impacts the equipment's efficiency, performance, and safety. Here’s how.

        1. Efficiency: The right power source ensures consistent operation, reducing downtime and increasing productivity, which maximizes profits.
        2. Safety: Proper power sources and electrical connections play a key role in preventing accidents and keeping operators safe.
        3. Cost: Selecting an appropriate power source can help manage operating costs and energy consumption, contributing to the overall profitability of the machining process.
        4. Reliability: A reliable power source ensures your equipment can perform its intended functions with minimal downtime and disruptions.
        Lathe vs. Mill: What’s the Difference? (3)

          Using Three-Phase Power for Lathing and Milling

          Three-phase power provides a more efficient and balanced electricity distribution compared to single-phase power. It consists of three alternating currents—called phases—that are 120 degrees out of phase with each other, creating a smoother and more constant flow of electricity. This balanced distribution reduces power fluctuations, making it ideal for powering heavy machinery like lathes and mills.

          Single-phase to three-phase converters provide the high voltage and current needed to operate these machines reliably. By supplying a balanced power source, three-phase electricity ensures the equipment runs smoothly, efficiently, and with reduced vibrations, enhancing precision and performance in various applications.

          Power Your Lathe or Mill the Right Way

          The most important factor to consider in the mill vs. lathe debate is how to power your chosen equipment. Don’t rely on single-phase power from your utility line to get the job done. Invest in a digital or rotary phase converter to ensure consistent operation for reduced downtime and enhanced productivity. Our phase converters are made with the highest-quality materials and can be customized to fit your unique specifications.

          Contact our team today to discuss your power needs and find a phase converter that’s right for you.

          Contact Us

                  Lathe vs. Mill: What’s the Difference? (2024)

                  FAQs

                  Lathe vs. Mill: What’s the Difference? ›

                  A lathe rotates a workpiece while its cutting tool stays stationary, while in a mill, the cutting tool is moved relative to the rotating workpiece. A lathe is used for machining cylindrical parts, whereas a mill can be used for machining both flat and curved surfaces.

                  What is the difference between a mill and a lathe? ›

                  The lathe is for your cylindrical and symmetrical shapes. The mill is for non-cylindrical workpieces. They work together to create complex shapes and can both be used on wood, metal, plastic, or a variety of other materials.

                  Can a lathe be used for milling? ›

                  Most machinists only consider using a mill as a lathe because they can't afford to get both tools. But if that's the case, it's far easier to use a lathe as a mill. Most lathes can quite easily do at least some milling – and you can use a lathe to create most of the parts you need to build your own mill, also.

                  What is the main difference between cutting parameters on a lathe vs. a mill? ›

                  Key Differences Between Mills and Lathes

                  Lathe parts are held by a spinning chuck while the cutting tool is stationary. Mill parts are stationary and are cut by a spinning, rotating cutting tool.

                  What is the difference between a lathe and a horizontal mill? ›

                  While a lathe is designed to cut and shape cylindrical or symmetrical workpieces, a mill is designed to shape flat and curved surfaces. Common applications include the following: Boring holes. Cutting slots.

                  Which is better turning or milling? ›

                  Uses: CNC milling is better suited for machining flat and irregular surfaces, while CNC turning is mainly used for working on cylindrical or conical surfaces. Cutting: CNC turning involves continuous cutting, with the tool maintaining constant contact with the workpiece.

                  What are the advantages of lathe machine over milling machine? ›

                  It is important to note that lathe machines are typically preferred for cutting cylindrical type shapes, especially when quick, repeatable and symmetrical shapes are the goal. On the other hand, manual milling machines are better suited to cutting more complex and intricate parts.

                  Can a CNC mill replace a lathe? ›

                  It all depends on the needed results and the workpiece, but the difference between the two machines is definitely evident. For clarification, a CNC Mill uses a table that grips the workpiece while moving it around a stationary tool cutting head. A CNC Lathe spins the workpiece as it removes material.

                  Is milling a lathe operation? ›

                  Yes, an old lathe (or new) can be used as a milling machine, however, very limited milling anything of substantial size. Special attachments are a must for anything other than standard lathe tooling. The cutting device is placed in the headstock either by collet or chuck.

                  What is an advantage to lathe cutting? ›

                  High Speed – The machining in the lathe can produce many products in a lesser time, especially with the use of CNC lathe and automatic lathe, because of its high-speed production.

                  Why is the lathe machine called the mother of all machines? ›

                  Lathe machines are known as the mother of all machine tools for a specific reason, which was that the heavy-duty lathe was the first machine tool which led to the invention of other machine-based tools. During the industrial revolution, lathes evolved into hydraulic lathe machines which had thicker, more rigid parts.

                  What is the difference between a CNC mill and a manual lathe? ›

                  For rapid tooling applications, CNC machining is preferred over manual lathes or manual milling machines. This is because rapid tooling works on very hard metals and alloys where manual tooling becomes hard to use due to poor machinability of materials.

                  Which is better, a lathe or a mill? ›

                  A mill, however, is better suited to machined parts that are not entirely cylindrical, have flat, complex features, or have offset/angled holes. Mills can machine cylindrical features but if the part is purely cylindrical, then a lathe is a better, more precise option.

                  What does CNC mean? ›

                  Computer numerical control (CNC) is defined as a technology that uses computers to control machines in manufacturing processes. It is a high-tech way to automate and precisely control the movements of tools and machinery in industries such as metalworking, woodworking, and even 3D printing.

                  Are Bridgeport mills still made? ›

                  Today, the Bridgeport brand still produces this configuration in both manual and computer numerical control (CNC) versions, and such machining centers are now equally as prominent as their manual counterparts.

                  What is the difference between a mill and a sawmill? ›

                  A mill is a factory that processes materials. A sawmill is a particular type of mill. one that uses saws to turn logs into lumber. There are also textile mills, steel mills, and so forth.

                  What is the difference between a milling machine and a turning machine? ›

                  There is one big difference between CNC turning and milling. CNC turning is typically used to create cylindrical parts, while CNC milling can be used to make parts of diverse shapes and sizes. As we move past the initial set-up, we start to see the key differences between the two CNC machining processes.

                  What are the three 3 basic types of milling machines? ›

                  Knee and Column Type
                  • Horizontal or Plain Milling Machine. Plain milling machines are more robust than hand millers. ...
                  • Vertical Milling Machine. The position of the spindle on a vertical milling machine is perpendicular or vertical to the table. ...
                  • Universal Milling Machine.
                  Apr 21, 2020

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