Peerless Capabilities

For over 25 years, we’ve built our business around centerless grinding. We provide production lead times as short as 24 hours for outside diameter grinding, and can supply quantities from a single prototype to several million units.

We offer a full complement of grinding services to satisfy the varied needs of our customers:

  • Infeed Grinding

  • Plunge Grinding

  • Profile Grinding

  • Thru Feed Grinding

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We combine flexibility with excellence in precision machining.
To determine if we can meet your needs, send us your print and RFQ.

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Thru Feed Centerless Grinding

We offer Thru Feed centerless grinding for machined metal parts that require grinding of the major outside diameter. When there are no “centers” and only the outermost diameter needs to be ground, the parts can be fed down a chute and then between two grinding wheels that spin the part to remove the surface.

Our Thru Feed centerless grinding services handle part diameters from .045″ (1.14 mm) to 1.0″ (25.4 mm) for a vast range of part lengths and offer maximum efficiency at minimal cost.

  • Part diameters from .045″ (1.14 mm) through 1.0″ (25.4 mm)

  • Large range of part lengths

  • Maximum efficiency grinding

  • Minimum cost grinding

  • Grinding after heat treating eliminates distortion

Infeed Centerless Grinding

We also offer Infeed centerless grinding for parts with more complex profiles along their lengths. Infeed grinding differs from through-feed grinding because the part is pressed against the grinding wheel rather than being fed axially.

Infeed grinding is typically faster and more economical that multi-step grinding processes for parts with complex profiles, radii, and multiple outside diameters. It is also the best method for maintaining diametric relationships. This type of grinding can also produce more precise flats and slots than conventional milling.

Our Thru-Feed centerless grinding services handle part diameters from .045″ (1.14 mm) to 1.250” (32 mm) for a vast range of part lengths and offer maximum efficiency at minimal cost.

  • Part diameters from .045″ (1.14 mm) through 1.0″ (25.4 mm)

  • Multiple outside diameters

  • Best method for maintaining diametric relationships

  • Complex profiles

  • Complex radii

  • Flats and slots ground with more precision than conventional milling

  • Grinding after heat treating eliminates distortion

Centerless Grinders for Making Precision Machined Parts

Exceptional metal parts demand exceptional machining equipment. We continually invest in our grinding equipment and capabilities to uphold this standard and adapt to our customers’ evolving needs.

Centerless Grinding Capabilities

Min Part Diameter 1.14 mm (.045″)
OD Tolerance +/- 2.5 µm (+/- .0001″)
Straightness 13 µm/mm (.0005″/inch)
Concentricity 5 µm/mm (.0002″/inch)
Surface Finish .15 µm Ra (6 µ” Ra)


  • CNC Swiss Star Lathes with FANUC Controls, high pressure pump and 12′ bar feeders

  • CNC Turning Centers (Samsung) – Complex geometries up to 8.5″ OD

  • Brown & Sharpe Screw Machines – best for less than 1.25” diameter for medium & long runs

  • Cincinnati Centerless Grinders, both thru-feed and in-feed (plunge grinding) for precision tolerances and finishes

  • Medart Bar Straightener (Bar straightener)

  • Various secondary operation equipment (Such as tumblers, deburring equipment, slotting)

  • Quality Inspection Equipment

Pioneering Quality Assurance

AS9100D and ISO9001:2015 certification (see our certification here) means we maintain quality standards worthy of aerospace and the U.S. government. Our modern non-contact inspection systems and software record detailed inspection results and provides Statistical Process Control (SPC) data for our customers. We use automated inspection equipment to measure both internal and external features, but no part leaves without a visual inspection.

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What We Offer… that Others Often Don’t

Our team of experienced professionals provide quotes and Design for Manufacturing (DFM) reviews when you need them. Deploy effective prototypes with fast, accurate quotes and feedback production feasibility.
Seize the competitive advantage of faster time-to-market for your cutting edge designs. We set aside dedicated resources to ensure quick delivery of your prototype.
Our inventory programs are as diverse as our customers. We curb the stress of forecasting and demand spikes with stocking programs and for no additional cost..

“Thanks you for the very prompt quote. The service you provided is just as your website says.”

Amy – Industrial industry

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