Reaming is used to precisely size and smooth existing holes, typically performed with a drill or milling machine. It offers tight tolerances—down to +0.0002”—comparable to precision grinding, but is limited to internal features only.

Honing is a precision finishing process that uses an abrasive stone in a reciprocating, rotating motion to refine internal surfaces. It produces a distinctive cross-hatch pattern and achieves tight tolerances down to +0.0005”. Honing is ideal for improving straightness, roundness, and taper in holes, though it requires longer setup times and higher initial equipment costs compared to other methods.

Lapping is a fine finishing process that uses an abrasive slurry to precisely remove material and achieve tight tolerances. The slurry—a mix of abrasive powder and liquid—is applied between two surfaces rubbing together. The workpiece remains stationary while a lap plate moves in a reciprocating motion against it. Lapping can reach dimensional accuracy as tight as 0.00002” (0.5 microns), making it ideal for ultra-precise parts. However, surface finish uniformity may vary after lapping.

Precision Grinding Services

Q: What grinding tolerances can Koonze Model achieve?

We can achieve tolerances as tight as ±0.0001 inch (±2.5 microns), depending on part geometry and material. Standard tolerances typically fall within ±0.0002 to ±0.0005 inch.

Q: What materials can be processed with your grinding services?

We work with a variety of metals including steel, stainless steel, aluminum, brass, titanium, and hardened alloys. Custom materials can be evaluated on request.

Q: Do you handle both prototype and production grinding?

Yes. We support both low-volume prototype development and high-volume production runs, maintaining precision and consistency across all batch sizes.

Q: What surface finishes can you deliver?

We can achieve surface finishes as fine as Ra 0.1–0.4 μm depending on the process, which is suitable for demanding applications like medical and aerospace components.

Q: Can you grind hardened or heat-treated materials?

Yes. We specialize in grinding hardened components, including post-heat-treatment parts, ensuring dimensional accuracy without compromising surface quality.

Q: What is the typical lead time for grinding projects?

Lead times vary by complexity and volume, but we typically deliver in 5–7 days. Expedited options are available for urgent jobs.

Q: Can Koonze Model assist with part design for grinding feasibility?

Absolutely. Our engineering team can review your drawings or CAD files and provide feedback to ensure your design is optimized for efficient grinding.

Koonze Model provides precision grinding services tailored for parts requiring tight tolerances and exceptional surface finishes. With advanced equipment and deep industry expertise, we serve demanding applications across aerospace, mold tooling, medical, and more.

Start a New Grinding Quote

Start to Upload Your Files

Upload 3D CAD files (STEP STP SLDPRT IPT PRT SAT IGES IGS CATPART X-T OBJ STL files) or common formats like Word, Excel, PPT, and images.

High-Precision Grinding Solutions by Koonze Model

At Koonze Model, we deliver precision grinding services engineered for tight tolerances and exceptional surface finishes. From one-off components to large-scale production, our capabilities serve industries such as automotive, aerospace, and heavy equipment.

We specialize in four core grinding processes to match various geometries and technical needs:

Cylindrical Grinding
Centerless Grinding
Internal Grinding
Spindle Grinding

Get a Grinding Quote >>

Our Precision Grinding Workflow

At Koonze Model, every grinding project follows a meticulous, quality-driven process to ensure accuracy, consistency, and optimal performance. From initial review to final inspection, we apply rigorous standards to deliver components that meet your exact specifications.

Requirement Analysis

We begin by reviewing your drawings, material needs, and tolerance requirements to determine the most suitable grinding method.

Process Planning

Our engineers define the grinding approach—surface, cylindrical, centerless, or internal—based on part geometry and performance criteria.

Equipment Setup

Precision grinding machines are calibrated, and the appropriate abrasives are selected to match your material and finish goals.

Grinding Execution

The CNC machine positions the tool at the correct starting point and gets ready for drilling.

Quality Inspection

Every part undergoes in-process and final inspection using high-precision measuring tools to verify tolerances and surface quality.

Finishing & Delivery

Parts are cleaned, deburred (if needed), and packed securely for prompt delivery—ready for assembly or final application.

START YOUR PROJECT TODAY

Request Your Precision Grinding Quote

Get a fast, accurate quote for your grinding project. From tight tolerances to specialty finishes, we deliver to your specs—on time, every time.

GET A FREE QUOTE

Your Reliable Grinding Partner

Guaranteed Tight Tolerances

We specialize in achieving ultra-precise tolerances—down to ± 0.0001"—ensuring every part meets your exact specifications, no matter how complex.

Versatile Grinding Capabilities

From cylindrical to centerless and internal grinding, we offer a full range of processes to handle diverse geometries and material types.

Consistent Quality Across Batches

Whether it’s a single prototype or a high-volume run, we maintain strict quality controls to ensure repeatable, reliable results.

Trusted by Demanding Industries

We serve sectors like aerospace, automotive, and industrial equipment—where performance and precision can’t be compromised.

Industry Applications of Precision Grinding

Koonze Model’s precision grinding services are trusted across multiple industries where accuracy, surface quality, and repeatability are critical. Our capabilities support the production of high-performance components with tight tolerances and superior finishes—helping clients meet demanding technical and regulatory requirements.

Alternatives to Precision Grinding

For certain components, abrasive grinding may not be the most efficient or suitable solution. At Koonze Model, we provide a range of alternative machining methods tailored to your part’s geometry, material, and performance requirements. See the options below for more details.

Reaming

Honing

Lapping