Precision centerless grinding in Schaumburg, Illinois. Mozaic Precision Metals provides thru-feed, in-feed and long-bar centerless grinding for customer-supplied round bars and cylindrical components. Our job-shop service controls outside diameter and surface condition to the drawing or purchase-order requirements. We also source material when customers need a combined bar supply and grinding quote.
Thru-Feed, In-Feed and Long-Bar Centerless Grinding
| Grinding method | Typical application | What to include in your RFQ |
|---|---|---|
| Thru-feed centerless grinding | Bars and parts with a continuous grindable outside diameter that can pass between the wheels | Bar diameter, length, grind length, total stock removal, target finish and volume |
| In-feed (plunge) grinding | Suitable parts with shoulders or profiles that do not allow continuous thru-feed travel | Drawing, shoulder positions, features, tolerances and part configuration |
| Long-bar grinding | Precision-diameter preparation of extended round bars, supported during processing | Starting and finished OD, full bar length, straightness/handling constraints and packaging |
Centerless OD grinding uses a grinding wheel, regulating wheel and work support blade. The grinding wheel removes material from the outside of the workpiece; regulating-wheel settings control rotation and feed. This is distinct from center-type cylindrical grinding and internal-diameter grinding.
Materials and Size Requirements
We process stainless steel, carbon and alloy steel, tool steels, selected nickel alloys and other materials when the condition and grinding setup are suitable. Common inquiries include 303 stainless, 316 stainless, 17-4 PH, and 4140 alloy steel.
Our broader bar-processing range includes diameters of approximately 0.060 to 8.000 inches and long-bar handling in the 3- to 24-foot range. Those figures describe the overall service scope, not a promise that every diameter, length, alloy or grinding method can be combined. In particular, in-feed capacity, thru-feed wheel limits and bar support requirements are evaluated separately for every job.
Diameter, Surface Finish, Straightness and Roundness
Reliable grinding quotes need more than a nominal diameter. We review the incoming OD, amount of stock removal, finished upper and lower diameter limits, surface finish, and inspection method. Straightness and roundness are independent characteristics; a bar can meet diameter tolerance yet still need straightening or additional process adjustments.
- Diameter: starting range, required finished OD, tolerance and full-length or localized measurement points.
- Surface finish: specify Ra or RMS if required and whether polishing follows grinding.
- Straightness: state the permitted deviation or TIR and the inspection support span.
- Material condition: annealed, cold-drawn, hardened or aged as specified; include heat/lot paperwork.
- Production: pieces, length, number of releases, completion date and protective packaging.
Fine tolerances and smooth surfaces may be achievable in suitable setups. The achievable result depends on wheel selection, material, bar rigidity, straightness and the requested diameter change; we confirm the process when reviewing your specifications rather than promising one tolerance for all parts.
Grinding Plus Straightening, Polishing and Cutting
As needed, Mozaic offers two-roll and press straightening, metal bar polishing, saw cutting, chamfering and protective shipping packages. We are ISO 9001:2015 certified and can review required inspection records and mill certifications by purchase order.
Centerless Grinding Services vs. Buying Ground Bar Stock
If you own raw material and need a specific size and finish, request a grinding-service quote here. If you want Mozaic to supply ready-to-machine precision ground round bars, visit our Precision Ground Bars supplier page. This division keeps processing inquiries distinct from finished stock purchasing.
Get a Centerless Grinding Quote
Send the drawing or your material grade and condition, incoming OD, target OD/tolerance, grind length, quantity, straightness/surface-finish requirements and shipping schedule. Request a centerless grinding quote; email sales@mozaicprecision.com or call 847-637-8379.
Our Centerless Grinding Equipment and Shop Process
Our Schaumburg shop uses Cincinnati centerless grinding equipment, including 2OM and Twin Grip machines, for qualifying round bar and cylindrical work. Grinding-wheel selection, work-rest height, regulating-wheel setup and bar support are matched to the job’s material, incoming condition and required finish. These are practical manufacturing considerations—not guarantees that every material or geometry will grind on every machine.
Long-Bar Grinding and Inspection Planning
Long bars need adequate support during grinding, handling, measurement and shipment. When specifying straightness, provide the support span, method and allowable deviation or total indicator reading (TIR). A diameter measurement alone cannot establish whether an unsupported 12-foot bar is straight enough for your application.
Typical Work We Quote
- Customer-supplied stainless or alloy steel bars requiring controlled outside diameter before CNC or Swiss machining
- Full-length bars requiring additional straightening and/or polishing after grinding
- Selected short cylindrical parts or stepped parts requiring an in-feed feasibility review
- Recurring releases where material, inspection and packaging requirements should be agreed before production
Centerless Grinding Near Chicago
Mozaic Precision Metals serves manufacturers and metal distributors from 499 Estes Ave, Schaumburg, IL 60193, in the Chicago area. We review projects from local machining shops and customers elsewhere in the United States. Send the starting OD, material/condition, target OD, length and quantity to sales@mozaicprecision.com or call 847-637-8379 for a feasibility and price review.