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CNC Turning and Centerless Grinding, Concentric Drive Shafts

CNC Turning and Centerless Grinding

CNC Turning Small Shaft

CNC Turned Small Shaft

CNC Turned Spline Shaft

CNC Turned Spline Shaft



High Precision CNC Turning Services

CNC turning is a manufacturing process in which material bars are positioned in a chuck and rotated while a specific tool is utilized to remove identified material to create the desired shape. The high precision CNC turning process is controlled through sophisticated computer software that precisely controls the material and tooling so that it cuts to the programmer’s exact specifications.

Petersen Precision is an industry-leading provider of CNC turned parts and high precision CNC turning capabilities. Contact us for more information on our precision turned parts and CNC turning services, or call us at 650-365-4373 and we will be happy to assist you with your direct CNC turning questions.

Can’t decide what machining process is best for your project? Upload your CAD file for a free quote and our Design for Manufacturing experts will help you decide. Check out our gallery for some finished products too!

Precision Turned Parts Manufacturing

We use state-of-the-art Swiss-style CNC lathes to produce tight tolerance turned metal parts for all applications across various industries. We work with metal bar stock up to 1.25” O.D. and can machine faces and flats with tolerances of up to ±0.0005”, and feature positions and profiles at up to ±0.0005”.

Even the most complex or intricate part designs can be reproduced accurately and with perfect repeatability, from the first piece to the hundred-thousandth. We work from your CAD or other digital design files to deliver precision turned parts that match your exact specifications. DFM service is available (see below).

Petersen Precision specializes in high volume CNC turning. We can turn and process tens of thousands to hundreds of thousands of parts or more. This enables us to run our CNC lathes with a single tooling setup for long periods, resulting in faster and more efficient production. We have nonstop manufacturing capabilities, including “lights out” production with our automated CNC technology, that allows for 24/6 production.

Efficient CNC Turning Capabilities

We have integrated our CNC turning and machining department with our CMM and quality assurance department. We utilize Zeiss CMMs (coordinate measuring machines) for in-process and final production checks to guarantee the accuracy and quality of finished parts.

Design for Manufacturing (DFM)

We offer DFM services to help make part production faster, easier, and less expensive. Our engineering team will work with you, as needed, to optimize your designs for better manufacturability, without altering the fit, form, or function of your turned parts. 

In-House Tooling Shop

We design, build, and service all tooling for our CNC turning projects in-house. We monitor every step of the process to ensure the precision and quality of your finished parts. All tooling is custom built to each project, and we will service and maintain your tooling for the life of your program, whether you need ten thousand or ten million parts per year.

Petersen Precision offers additional services in-house to save you time and money on your project, shorten your supply chain, and decrease the possibility of hiccups or oversight.

What is the Difference Between CNC Turning and CNC Milling?

CNC Turning uses computer-controlled machines to create a process using a single-point cutting tool that inserts parallel to the material to cut. The material is rotated at changing speeds and the tool cutting traverses to create cylindrical cuts with exact measurements. CNC turning can be used to create circular or tubular shares from larger material pieces. It is an automated process and speeds can be adjustments for greater accuracy.

Conversely, CNC Milling uses a similar set of input data, but the part is affixed in place and the tooling is spun at high speed to remove material. The mill drills and moves along multiple axes to cut materials on paths programmed via computer. Computer programming allows machines to make precise cuts repeatedly to maintain part consistency.

Advantages of CNC Turning with Petersen Precision

A CNC machine is a machine that utilizes Computer Numerical Control over machine tools like lathes, routers, grinders, or mills. The CNC machine language provides precise control over features like speed, location, coordination, and feed rate. By feeding the raw bar stock into the machine it can continuously run with minimal attending.  Some direct benefits related to bar fed precision turned parts include:

  • Improves machining accuracy
  • Enables complex detail
  • Creates flexibility in manufacturing
  • Increases safety
  • Boosts production volume
  • Reduces setup-changeover time

CNC Turning Materials: Available Metals & Alloys for High Precision Turned Parts

With our extensive experience and advanced CNC technology, Petersen Precision can deliver tight tolerance turned metal parts for any application. We provide full-service CNC turning to give you components that match your exact design specifications, in the high quantities your project requires. Our CNC turning capabilities enable us to provide superior accuracy and repeatability for high volume parts. We turn parts from a wide range of bar stock materials.

Available materials for CNC machining:

Contact Petersen Precision for Custom CNC Turning Capabilities Today

Make Petersen Precision your first choice for high quality, high precision CNC turned parts and components. Request a quote on tight tolerance CNC turning, or contact us to discuss your project.



CNC Turning and Centerless Grinding, Concentric Drive Shafts

CNC Turning and Centerless Grinding

CNC Turning Small Shaft

CNC Turned Small Shaft

CNC Turned Spline Shaft

CNC Turned Spline Shaft