What Is a CNC Spindle and How Does It Function?

what is a cnc spindle and how does it function

CNC spindles play a crucial role in machining. These components are fundamental to a fast and efficient process, while also ensuring that produced elements are as precise as possible. Based in Taylor, MI, Superior Spindle is a leading voice in the repair of all types of spindles and their components. As a result, they provide the following information concerning what is a CNC spindle and how does it function to their customers, so that they remain up-to-date on the latest spindle methodology.

How Spindles Work

Machining spindles are often powered by electricity, but they can also be powered by compressed air. They’re available in a wide range of sizes to meet many different needs. A spindle is devised of a motor, a taper for holding tools, and a shaft that holds together all the separate components. Spindles rotate on an axis, which receives input on movement from the accompanying CNC controller.

Types of High-Speed Spindles

In machine shops, high-speed spindles are often preferred, as these configurations work best when dealing with metal and other materials. There are two types of high-speed spindles, each of which offers its own distinct set of benefits. An integral motor spindle features an internal motor, with a maximum speed range of 60,000 RPMs. Such a high maximum speed makes it great for a number of machining applications but can also limit its lifespan. Additionally, power and torque are limited due to the constricting design of motor housing.

Belt-driven spindles are another high-speed option. While max speed, which is 15,000 RPMs, is far less than integral motor spindles, this design can achieve greater levels of power and torque thanks to the external motor. This spindle type is also less costly, which makes it an ideal option for machine shops with limited budgets. However, the low max speed can restrict how the spindle is used.

Applications of Spindles

Spindles have a multitude of uses across many different industries. This includes equipment integral to agriculture, automotive applications, mold manufacturing, and even aerospace applications. In terms of the machining process, spindles play an important role in a fast production space.

For instance, metal lathes are used to cut hard materials. Along with metals, these machines can also cut plastics, as well as sturdy composite materials. Lathes can be used for milling, which uses rotary cutters to trim away at a piece until it reaches the desired shape. Machines containing spindles can also be used in woodworking, electrical component creation, and manufacturing parts for computers.

Spindle Repair

Over time, it’s likely that your spindles will break down due to gradual wear. If so, repair service is crucial to prevent disruptions to your operation. A CNC spindle rebuild entails numerous elements, from analysis of the pieces current condition to performing a test on the newly rebuilt component. It’s also a rigorous process that should only be undertaken by highly-experienced professionals. For example, reassembling new spindle components must take place in a sterilized environment to prevent dirt and debris from coming in contact with the component. This speeds up degradation and greatly shortens the lifespan of your spindle.

You might also consider having your equipment upgraded. Advances in technology come at a rapid pace these days, which means you run the risk of lagging behind competitors if you don’t make the necessary alterations. Upgrades can increase speed and precision, while also boosting tolerances. Upgrades may also allow your components to last longer, which means they will be far more cost-effective in the long run.

If you have questions about CNC spindle rebuilding or repair services, Superior Spindle is here to provide the answers you need. They offer the benefit of more than a century of experience, which means they can evaluate your equipment and provide a recommendation on the absolute best repair or rebuild option. Call (877) 946-7400 today to speak with a friendly and knowledgeable representative about your business’s needs. You can also use their convenient online contact form to request a quote.

Related posts


State of the Art Services, Superior Spindle can resolve all of your Spindle Repair and Remanufacturing requirements.

Get A Quote
Phone Map Contact Quote