CNC OD Grinding

Precision Grinding for Cylindrical Parts with Tight Tolerances

What is CNC OD Grinding?

CNC OD grinding is a precision grinding process that uses a Computer Numerical Control (CNC) system to grind the outside diameter (OD) of a cylindrical workpiece. This means a computer precisely controls the movement and actions of a grinding wheel to achieve high accuracy and surface quality on the outer surface of a cylindrical part.

CNC OD grinding equipment is used for accuracy on difficult parts such as those requiring contour grinding, angles, tapers, spheres, radii, and shutoffs. This method also allows for high-precision machining of diameters and profiles, often required for parts with multiple diameters or complex geometries, such as drivetrain components, output shafts, armature shafts, and crankshafts.

CNC OD Grinding: Ideal for Tight Tolerances and Accurate Grinding

CPG’s high-precision CNC OD grinding services are ideal for achieving the tight tolerances—whether you’re dealing with low-volume, high-complexity parts or high-volume jobs with demanding specifications. CPG routinely performs in-line multi-diameter and eccentric multi-diameter work with tight geometric requirements. We can hold cylindricity, concentricity, run out, size, length, grind lead, and surface finish requirements.

We can grind diameters up to 10″ by 40″ long between centers.

Our 12 Mitsubishi CNC Grinders feature both straight and angle heads—providing the versatility to grind multiple features on a single part and hold tolerances that most other grinding solutions cannot match.

Is CPG’s CNC OD Grinding Right for Your Application & Industry?

CNC OD grinding services are ideal for industries like automotive, aerospace, agriculture & heavy equipment, motion control and medical device manufacturing, where precision is critical for parts like shafts, bearings, and spindles.

If your metal or plastic components require tight tolerances and high accuracy, our CNC OD grinding solutions can meet your needs with proven reliability and performance.
Below are just some examples of the CNC OD grinding work we’ve done for OEMs and other manufacturers in metro Milwaukee and throughout the Midwest.

Part type: Shaft – OD Grinding

Industries: Agriculture, Building/Construction Equipment, Military/Defense Equipment, Oil & Gas Services

Applications: Shafts used in any industry with a moving part

Part type: Crankshaft End Journal – OD Grinding

Industries: Recreational Vehicle/Power Sports

Applications: Converts rotary to reciprocating motion. Used in mechanisms where a back-and-forth movement is required such as pumps.

Part type: Eccentric Shaft – OD Grinding

Industries: Oil & Gas Services

Applications: Converts rotary to reciprocating motion. Used in mechanisms where a back-and-forth movement is required such as pumps.

Part type: Eccentric Shaft – OD Grinding

Industries: Building/Construction Equipment

Applications: Converts rotary to reciprocating motion. Used in mechanisms where a back-and-forth movement is required such as pumps.

Part type: Crankshaft – OD Grinding

Industries: Agriculture

Applications: Converts rotary to reciprocating motion. Used in mechanisms where a back-and-forth movement is required such as pumps.

Part type: Spindle Shaft – OD Grinding & ID Grinding

Industries: Agriculture, Auto/Transportation, Oil & Gas Services, Recreational Vehicle/Power Sports

Applications: Shafts used in any industry with a moving part

Part type: Countershaft – OD Grinding

Industries: Power Transmission, Industrial Machinery

Applications: A countershaft, also known as a jackshaft, is a mechanical component used to transmit power and synchronize rotational forces in various applications.

Part type: Crankshaft – OD Grinding

Industries: Military/Defense Equipment

Applications: Converts rotary to reciprocating motion. Used in mechanisms where a back-and-forth movement is required such as pumps.

Part type: Spindle Shaft – OD and ID Grinding

Industries: Agriculture, Auto/Transportation, Oil & Gas Services, Recreational Vehicle/Power Sports

Applications: Shafts used in any industry with a moving part

Part type: Screw Shaft – OD Grinding

Industries: Industrial Machinery, Building/Construction Equipment

Applications: A screw shaft converts rotational motion into linear motion and torque into linear force.

Part type: Pump Shaft – OD Grinding

Industries: Recreational Vehicle/Power Sports

Applications: Pump shafts connect the motor (or other drive source) to the impeller, enabling the transfer of torque that causes the impeller to rotate and move fluid through the pump.

Part type: Crankshaft – OD Grinding

Industries: Auto/Transportation

Applications: Converts rotary to reciprocating motion. Used in mechanisms where a back-and-forth movement is required such as pumps.

Part type: Crankshaft – OD Grinding

Industries:Agriculture, Military/Defense Equipment, Building/Construction Equipment, Power Transmission

Applications: Flange yokes join two shafts together, allowing them to rotate as a single unit and efficiently transfer power.

Part type: Yoke Flange – OD Grinding

Industries: Recreational Vehicle/Power Sports

Applications: Pump shafts connect the motor (or other drive source) to the impeller, enabling the transfer of torque that causes the impeller to rotate and move fluid through the pump.

Part type: End Yoke-OD Grinding

Industries: Agriculture, Military/Defense Equipment, Building/Construction Equipment, Auto/Transportation, Power Transmission

Applications: End yokes are connectors at the ends of the driveshaft that facilitate torque transfer between the driveshaft and other drivetrain components.

Part type: Double Tapered Crankpin – OD Grinding

Industries: Recreational Vehicle/Power Sports, Industrial Machinery

Applications: Specialized components used primarily in internal combustion engines, reciprocating pumps and compressors

Part type: Lever – OD Grinding

Industries: Building/Construction Equipment, Agriculture

Applications: Control valve lever with spherical radius for operator station or engine throttle

Part type: Shaft – OD Grinding

Industries: Agriculture, Building/Construction Equipment, Military/Defense Equipment, Recreational Vehicle/Power Sports

Applications: Shafts used in any industry with a moving part

Part type: Spool – OD Grinding; Valve Body – ID Honing and OD Grinding

Industries: Agriculture, Auto/Transportation, Building/Construction Equipment, Military/Defense Equipment, Oil & Gas Services, Recreational Vehicle/Power Sports

Applications: A hydraulic spool valve is a crucial component in hydraulic systems, acting as a directional control valve that regulates the flow of hydraulic fluid by shifting a cylindrical part called a spool within the valve body.

Part type: “No lead grinding finishes” – OD Grinding

Industries: Agriculture, Building/Construction Equipment, Military/Defense Equipment, Industrial Machinery, Power Transmission

Applications: “No lead grinding finishes” refers to a grinding process that aims to produce a surface free from the “lead” effect, which is a rotation-dependent pumping effect caused by certain surface structures.

What Our Customers Say

"Custom Production Grinding has been a valued partner in our supply chain for more than 15 years. They always deliver a quality product at a reasonable price in a timely manner. The staff is knowledgeable, dedicated and always willing to help us out of what is seemingly some hard-to-meet deadline requests. I would recommend Custom Production Grinding to anyone looking to have grinding done to a job. In my mind, they are second to none."

"Thank you and your team for the quick turnaround on the shaft project. I had a lot of pressure on getting these completed, with it being such a high-profile project for us, and of course by the time you got the parts there was no time to spare. Somehow I always worry, but somehow you guys always come through for me! In times like this it reminds me why I consider you a partner vs. just another one of my suppliers."

"I have been using CPG for more than 20 years for my grinding needs. I have always been very satisfied with their professionalism, quality and attention to detail. They truly have a sense of urgency when it comes to servicing each job. They will go above and beyond to get the job done when we need it, and they are one of the most competitively priced grinders in southeastern Wisconsin. I would recommend them for any grinding projects – whether it’s a small quantity, or large production run."

"I’ve been in supply chain management more than 30 years and am pleased to share that Custom Production Grinding is by far one of the most outstanding vendors I have worked with to date. Their staff is extremely easy to work with and does their utmost to achieve our sometimes unreasonable goals; it could be a move-up in a delivery promise, a same-day quote request, an explanation of said quote, or collaboration on a difficult solution or corrective action. I would gladly recommend their organization for your production grinding needs."

"CPG has been grinding our parts since the start of our company in 1997. They have earned our business and trust over the decades. The quality we received from them has been second to none and we know they will grind the job right. Their staff has a great understanding of our products and guide us in ways to produce our parts to help cut costs in the grinding process. We have been in rush situations with no time to go through the quoting process and just sent them the parts to be ground. Because of their integrity, we know we will be treated fairly. They are a great partner to us."

"We’ve worked with CPG for more than 15 years. They are a trusted partner in exceeding our customers' expectations!"

"We have been doing business with CPG for over 38 years. They have been a strategic part of our supply chain since they opened. They are easy to work with and extremely accommodating to our due dates, with quick turnaround times. They produce quality parts and have great attention to detail."

Ready to Improve the Precision of Your Cylindrical Parts?

Get a free quote and discover how CPG’s grinding solutions can help optimize your manufacturing process and improve the quality of your metal or plastic parts.

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