Since 1958, Centerless Products has provided advanced solutions for precision material processing. Our experienced operators combine state-of-the-art CNC grinding equipment with refined methodologies to achieve industry-leading dimensional tolerances and surface finishes.

Organizations partnering with Centerless Products benefit from our responsive, consultative approach and proactive service model. Within our specialized size ranges, clients consistently discover that we deliver superior quality at competitive pricing.

Capabilities and Tolerances

Ultra-Precise Centerless Bar Grinding

Bar Grinding:

  • Diameters from 0.008” ( 0.2mm ) to 3.000” ( 100mm ), weight dependent *
  • Lengths to 200.00” ( 5m ), weight dependent *
  • Tolerances to ± 0.00004” ( 2μm )
  • Roundness to 0.00002” ( 0.5μm )
  • Surface finishes to ≤ 4 RA μin ( 0.05μm )

Materials we work with :

We successfully grind a diverse range of materials with ease, including many exotic and difficult-to-machine grades.

Commonly ground materials include :

  • Medical grades — 302/304, 304L, 304V, 304LVM, 316/316L, 420MOD, 440A, 440C, TI 6AL-4V, TI 6AL-4V ELI, 17-4 ( 630 ), 17-7 ( 631 ), 465, MP35N, L605, Biodur® 108, CCM, CCM PLUS, NiTi, etc.
  • Stainless Steel – 17-4, 17-4 H900, 17-4 H1150, 17-7 Cond. C, 300 series, 400 series, PH grades, Duplex grades, Nitronic, and more
  • Titanium – CP Grades 1 – 4, 6AL-4V ( Grade 5 ), 6AL-4V ELI ( Grade 23 ), 6AL-7Nb, and more
  • Aluminum – 2011, 2017, 2024, 3003, 6061, 7075, and more
  • Carbon & Alloy Steel – 1018, 1117, 12L14, 1144, 1045, 4130, 4140, 4340, 52100, 8620, 9310, Nitriding
    135, 300M, and more
  • Plastics — PEEK ( Implantable and glass filled ), PTFE, Acrylic, Nylon, Vespel, Torlon, Rulon, ABS, PVC, Delrin, etc.
  • Nickel – 200/201, Monel, Inconel, Incoloy, Waspaloy, Hastelloy, Nimonic, Nilo, etc.

Complimentary Services :

Precision grinding is just the foundation. To deliver complete solutions, Centerless Products provides complementary services both in-house and through our network of certified industry partners:

  • Precision Straightening — Rotary two-roll and press-type methods
  • Cutting Services — Bandsaw, cold saw, abrasive cut-off, and electro-chemical cutting for precise blanks and burr free options
  • Material Testing & Validation — ISO 17025 certified laboratory analysis including chemical composition, mechanical properties, eddy current inspection, ultrasonic testing, and XRF material identification
  • Heat Treatment — NADCAP certified processing to ASTM, AMS and MIL specs
  • Pointing & Chamfering — Making your material easier to load and feed
  • Supply Chain Solutions — Customized programs designed around your production requirements
  • Specialized Packaging — Protective packaging solutions for direct shipment to you or your customers, including white-label options

Precision Ground Material Benefits :

  • Shorten Cycle Times — Using near-net, precision ground bars closer to your final size means Swiss machines remove less material during production, shortening cycle times and boosting output.
  • Reduce Operator Dependency — Precision ground bars help level the playing field when it comes to operator experience. When material consistency is high, even less experienced operators can achieve better results because they’re not constantly compensating for material variations
  • Extend The Life of Tools — Consistent diameter and roundness mean cutting tools encounter uniform material, reducing wear and breakage. This translates to fewer tool changes and lower tooling costs.
  • Reduce Scrap Rates — Tight dimensional consistency eliminates out-of-tolerance parts caused by material variation. This is especially critical in Swiss turning where material inconsistencies can compound across small part features.
  • Reduce Part Cost — While precision ground bar stock costs more upfront, the combined savings from faster cycles, longer tool life, reduced scrap, and eliminated secondary operations typically result in a lower total cost per part.
  • Go Lights Out Without the Worry — Consistent bar dimensions enable smoother bar feeding, enabling you to go lights out, while eliminating machine downtime due to seized bushings or bar-feeder jams

The Centerless Products Advantage

Rapid Response Service

Some projects can’t wait for standard lead times. Our expedited service dedicates machine capacity to quick-turn work without sacrificing precision. Most quotes return within two business days, with even faster turnaround when material is available.

Fast-track service features:

  • Priority scheduling for urgent needs
  • Flexible material sourcing options
  • Streamlined setup procedures
  • High precision standards always maintained

Quality Assurance

Every project receives full dimensional verification and documentation. We maintain statistical process controls, implement in-process gauging, and work toward six-sigma capability across operations. Your specifications drive our quality standards—we meet them consistently.

Learn more about our process.

Getting Started

Ready to discuss your grinding requirements? Whether you’re facing a unique technical challenge or need a reliable partner for ongoing production, Centerless Products brings the expertise and capacity to deliver exceptional results.

Contact us to explore how our capabilities align with your needs. We’re ready to turn your most demanding specifications into finished components.