Custom Swiss Screw Machine Parts & CNC Turned Parts
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(630) 628-0249

Precision Machine Shop providing
Swiss Screw Machine Products, CNC Turned Parts
& Centerless Grinding Services

Looking for small precision machined parts? Pioneer Service is a screw machine shop providing precision CNC Swiss screw machine  parts, CNC turned parts and centerless grinding services.  Typical applications include armatures, axles, bolts, bushings, couplings, drive shafts, pins, fasteners, spacers and much more. We have modern CNC Swiss screw machinesCNC turning centers as well as other screw machines for simple, but precise parts. Precision machined Swiss parts are our specialty. Our equipment gives us flexibility to makes parts that meet your budget and deadline goals. Our values provide you with peace of mind that comes from building relationships with great people at a great company.

We’re focused on providing fast reliable service and top quality parts. We provide precision manufactured parts to the United States, Canada and Mexico.

Swiss Screwing Machine Shop

CNC Swiss Lathes make parts from .040″ OD  on various size Swiss screw machines.

CNC Turning Centers

The right machinists make all the difference for parts on the CNC Turning Centers.

We know you are in a hurry. You need to source parts with the best delivery, price, and quality. You don’t want high minimum order quantities in order to get the price because you can end up with too much inventory. You need a partner you can trust. You need flexible Just-In-Time delivery.

For our customers, Pioneer Service Inc. is that partner. We can hold inventory on our shelf at agreed upon quantities. We can hold cushion inventory for emergencies if that is helpful for your business. We price at the EAU quantity, not the release quantity, so you get the best volume price and don’t needlessly fill up your warehouse. We expand and contract to support your needs. We know our job is to keep you up and running.

You can call it KANBAN, a blanket order with releases or Just-In-Time delivery. No matter what the name, you can count on Pioneer Service to provide the machined parts you need, when you need them, in a program that works for your company.

Precision Swiss Machined and CNC Turned Parts

We are here to help you with your short and long-run needs of precision Swiss parts and CNC turned parts.   Materials include steel, stainless steel, tool steel, aluminum, brass and nickel bearing alloys. Our in-house bar straightening assures industry-leading straightness tolerances.


  • Rapid responses to your engineering, quoting and production needs
  • Short delivery lead-times are possible due to our extensive raw material selection
  • Quick turnaround on prototypes with a dedicated CNC


  • Upper management’s active involvement in daily operations to make the impossible, possible
  • AS9100D and ISO 9001:2015 certified and quality-focused since inception in 1990


  • Competitive pricing, no extra fees for expedited orders
  • Extra leverage with “supplier diversity” aware automotive and government customers due to our Certified Woman-Owned and Operated Small Business (WBE/WOSB) designation


  • Ability to source everything from simple shafts to a complex CNC part cost effectively due to a range of equipment and centerless grinding services in one place
  • Customized stocking programs for just-in-time delivery requirements

Centerless Grinding

Our centerless grinding services can ensure your components’ surface finish to as low as 6 micro-inches (.15 micron) RMS and outside diameters to within ± 0.0001” (2.5 µm).  Our thru-feed grinding is ideal for cylindrical parts with a major OD, and our in-feed grinding is the optimal way to resolve several features, including burr-free flats and multiple ODs.

Everything produced by Pioneer Service is made in the USA. Contact us here to learn how we can provide you big-business results with a small-business approach. We are a screw machine shop that you can trust.

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“We received your shipment of XXX-XXX. They look great and everything seems to be in spec. They also perform really well which is a huge deal for us as it's given us clarity for our upcoming product release. Thanks again for the quick turn around and all your help!”
Chris H.- Product Development
“Thank you Eric! You have saved our reputation.I am really happy that we will be able to ship them tomorrow. Thank you !!!!!!!!”
Gregory K.- Instrumentation
“You guys are the best!Thank you all for your prompt replies and support. You continue to impress me.”
Mike U.- Aerospace/Defense Company
“Thank you Eric! You have saved our reputation.I am really happy that we will be able to ship them tomorrow. Thank you !!!!!!!!”
Gregory K.- Instrumentation
“We are very pleased with the outcome of the first bushing Pioneer Service produced. I sent an e-mail to James Sass and informed him we will be sending a second bushing we will be needing.”
David M.- Firearms Manufacturer
“My compliments to you and the team for hitting a home run!”
Gene D.- Automotive Aftermarket Manufacturer
“Attached is the new PO … You guys are doing a great job and on time delivery and quality are superb. Keep up the good work.”
Eric H.- Power Industry
“I see your commitment to quality and your deliveries are excellent. I look forward to continue building this relationship.”
Brad D.- Oil & Gas
“I am pleased to let you know that everything was perfect. The documentation was solid, the parts were all within specifications, and they assembled as designed. Not even a single part was out of spec. !”
Scott L.- Medical Device Mfg.
“We got the parts in yesterday afternoon. I opened the box and checked out a few and they looked GREAT! Thanks for all your help, and please pass along our gratitude to your crew as well! AND … thanks for doing such a nice job on the packaging, too.”
Todd K.- Furniture Mfg.
We have been purchasing shafts for our electric motors from Pioneer Service for decades. Pioneer is one of the best, if not the best, supplier of any product we have ever had. Their consistent quality, aggressive pricing and fast response time is unmatched!
Dave B.- Operations Mgr/Sub-fractional AC Motors
Pioneer Service has been a long time supplier and our plants use millions of Pioneer shafts per year. We have had ZERO quality or delivery issues with Pioneer. Forecasting, in our industry, is very difficult and we know we can always rely on Pioneer to expedite our rush orders!
Mike S.- Commodity Mgr/Electric Motors Mfg.
“Pioneer Service…fast quotes, clear communication, good quality, attractive pricing. One of my best vendors!”
Jay B.- Manufacturing Job Shop