Tight-Tolerance Grinding for Custom Parts
- Guaranteed Tolerances
- Excellent Surface Finish
- On-time Delivery
- Prototypes and Small Batches Accepted
- Maintain Consistency
- ISO 9001:2015 certified
What Is Precision Grinding?
Precision grinding is a finishing process used to control the final dimensions, geometric accuracy, and surface quality of parts. It is a cost-effective and reliable method that allows parts to achieve precise tolerances and good surface finish. During the machining process, the high-speed rotating grinding wheel uses a large number of fine abrasive grains to remove a small amount of material layer by layer from the surface of the workpiece.
This process is usually scheduled after rough machining, semi-finishing or heat treatment. It is mainly used to correct dimensional deviations and material deformations caused by previous processes.
One-Stop Provider of CNC Grinding Solutions
As a CNC machining manufacturer with 14 years of processing experience, DSR is proficient in all grinding processes. We have a professional technical team who can skillfully control various types of grinding machines to provide our customers with high-quality and precision grinding services.
We have purchased multiple advanced CNC machine tools to give your parts better geometric accuracy and superior surface finish. These machines also allow us to grind parts of various sizes, shapes, and geometric complexities. Furthermore, depending on your workpiece requirements, we can offer various machining solutions such as surface grinding, internal and external cylindrical grinding, and centerless grinding, to meet the needs of different application industries. Whether it’s sample verification, small batch custom orders, or mass production requiring stable repetitive accuracy,we conduct production and inspection in accordance with a unified set of technical standards.
DSR is ISO 9001 certified, and we use measuring instruments such as profilometers and coordinate measuring machines to ensure that part specifications meet drawing requirements. In addition, we offer other surface finishing services, including polishing, electroplating, and coating.
Send your drawings, material information and technical requirements to DSR. We will evaluate the most suitable CNC grinding process for you and provide a machining solution that ensures manufacturability and cost control.
Our Precision Grinding Capabilities
When it comes to grinding methods, more complex isn’t necessarily better.From prototypes and small batches to mass production, we develop the most suitable grinding solution based on your parts’ functions, materials, heat treatment, and inspection requirements. This can help our customers reduce exceedances and assembly risks.
We use OD Grinding to control the outer diameter, roundness, cylindricity and other characteristics of rotating parts. This process is suitable for shafts, pins, rollers and hydraulic components, and it also ensures consistency in repeat production.
- Outer diameter grinding with a roundness tolerance of ±0.005 mm
- Diameter range: Ø3 – Ø320 mm, maximum length 1,500 mm
- Roundness: ≤ 0.005 mm | Coaxiality: ≤ 0.005 mm
ID Grinding is used for finishing the internal bore diameter of parts.We select the appropriate process based on the bore diameter, depth, and length-to-diameter ratio of your components. We strictly control internal diameter tolerances and ensure excellent cylindricity.
- Aperture Range: Ø5 – Ø150 mm
High-volume, cost-effective grinding solution for pins, locating pins, and small shaft components. Through this process, we can control the outer diameter, straightness, and surface quality of parts in mass production while improving processing efficiency.
- Diameter range: Ø1 – Ø80 mm
- Suitable batch sizes: 1,000 – 500,000+ pieces
We use surface grinding to machine the flat surfaces of parts, which allows us to control part characteristics such as thickness, flatness, parallelism, and surface roughness. Flatness can be as low as 0.005 mm, and surface roughness can be as low as Ra 0.4 µm.
- Maximum workpiece dimensions: 1,000 × 500 × 400 mm
- Parallelism: ≤ 0.005 mm
DSR reviews thread specifications based on drawing requirements and formulate an appropriate thread grinding plan. We strictly control pitch accuracy and thread profile accuracy. In addition, thread grinding also serves as the final finishing method after heat treatment.
- Diameter range: Ø2 – Ø50 mm, maximum grinding length 100 mm
- Pitch error: ≤ 0.02 mm | Thread profile half-angle error: ≤ ±5′
- Supports integral grinding and forming after heat treatment (HRC 62), with no need for preliminary thread turning
Profile grinding is used to achieve shaped surfaces that are difficult to produce consistently using conventional milling or surface grinding. We will machine precision features of parts through wheel forming or CNC path processing based on your profile shape and quality requirements.
- Complex contours, punch dies, precision hole machining, positional accuracy up to ±0.002mm
Our CNC Grinding Machines
Our CNC grinding machines have been optimized for the functionality of your parts, ensuring that they can perform better. Whether it’s prototyping or batch production, we can complete the manufacturing tasks for you.
Used to grind the surfaces of parts to achieve excellent surface finish. This process is well-suited for sheet metal parts, stamping dies, and precision mechanical parts, and can also be used to machine a wide variety of materials.
This machine tool can be used to grind the surfaces of cylindrical parts, including outer diameter (OD) and inner diameter (ID). It is capable of ensuring the accuracy of diameter, cylindricity, and related fitting dimensions. It is suitable for machining parts such as shafts, sleeves, and pins.
This machine tool can grind the surfaces of slender cylindrical parts without using a center to clamp the workpiece. It maintains consistency in the parts’ outer diameters and surface quality while improving batch processing efficiency.
It can be used for finishing the tooth surfaces of various types of gears. This machine tool improves the smoothness of gear transmission by controlling tooth profile, tooth direction and related meshing accuracy.
This machine tool is capable of machining various types of threads on parts with high precision, including internal threads, external threads, trapezoidal threads, and more. It can precisely control the accuracy of pitch, thread profile, mean diameter, and lead.
Used for precision grinding of crankshaft main journals, connecting rod journals and other components. It can grind component fillets and chamfers with high precision, and stably control dimensions and roundness, helping to improve engine running smoothness.
This machine tool precisely grinds cam profiles through CNC trajectory control, ensuring cam lift curves, phase consistency, and uniformity between individual cams. It is suitable for precision machining of camshafts in engines and power systems.
Suitable for the manufacture and regrinding of cutting tools such as drill bits and end mills. This machine tool can machine complex tool contours, helping to restore the tools’ cutting performance and extend their service life.
Advantages of DSR Custom Grinding Services
DSR will select appropriate equipment, grinding wheels and inspection methods based on your drawings and part functions. We have a team of professional engineers who can provide you with expert technical advice.
DSR strictly controls the manufacturing process and product quality to minimize various risks, allowing our customers to arrange subsequent production with more peace of mind.
For mass-produced parts, we can ensure that they have consistent dimensions, geometric accuracy, and surface quality. DSR effectively controls the consistency of part production.
We develop machining and inspection plans based on the key functional features in your drawings to help customers obtain precision parts that meet assembly and usage requirements.
DSR provides you with cost-effective grinding services through process reviews, appropriate grinding methods, and quality control of key features.
We develop excellent grinding solutions tailored to each of our customers’ parts and use advanced production technologies to improve production efficiency.
Select Appropriate Grinding Method For The Material
Due to the significant differences in grinding characteristics of different materials, DSR must select appropriate grinding processing solutions based on each of your part drawings. This is because material grade, hardness, heat treatment condition, and part structure directly affect the wheel selection, grinding efficiency, heat control, and final surface quality of part machining.
Therefore, we have also established mature grinding process databases for each type of material.
Choose from the following materials:
- Carbon steel and alloy steel
- Hardened steel and tool steel
- Stainless steel
- Aluminum
- Copper and brass alloys
- Titanium alloys
Strict Quality Inspection for Grinding Parts
Precision grinding typically takes place at the final stage of the production process. DSR develops inspection plans based on part drawings, part functions, and customer quality requirements, and schedules inspections at key points in the production process. Our inspection lab is equipped with advanced instruments such as roundness gauges and CMMs.
We not only inspect outer diameters, inner diameters, and thicknesses, but also verify specifications such as roundness and cylindricity according to part requirements. This is also to ensure that the grinding characteristics of parts can meet subsequent assembly and actual usage requirements.
Precision CNC Grinding Services for High-Volume and Complex Solutions
The CNC machine tools used by DSR are very suitable for precision grinding of large batches of parts. CNC precision grinding services are typically used for repetitive precision grinding operations that require high accuracy, ensuring a high degree of consistency across the entire batch of parts.
We use CNC programs to precisely control the grinding wheel’s path, feed rate, grinding depth, and other parameters. For batch manufacturing parts, we adopt the same machining programs and quality standards, thereby ensuring repeatable parts with identical machining results and reducing human operation errors.
Our Collaboration Process for Grinding Projects
Precision grinding is critical to the accuracy of parts, so any misunderstanding of requirements can lead to rework and delivery delays. DSR has a complete set of collaboration processes that enable smoother communication between you and us.
You upload PDF drawings with dimensions and STEP models in the form (NDA confidentiality agreement can be signed), and provide your specific requirements.
Our engineers will carefully review your drawing files, conduct feasibility assessments, and select appropriate grinding solutions based on specific part requirements. We will respond to you within 24 hours.
Once you approve our quote, we will begin production. During the grinding process, we will strictly monitor the critical dimensions and surface quality of the parts.
After production is completed, our quality inspectors will conduct final inspection of the parts to ensure that all part specifications meet the requirements of your drawings.
Qualified parts will be cleaned, protected, and properly packaged, and delivered along with the required quality documentation.
What Industries Do Our Grinding Services Serve?
Different industrial fields have different requirements for grinding parts. DSR selects the optimal grinding method based on the part’s operating environment, material, and functional characteristics to ensure your parts can play an important role.
DSR ensures the consistency of mass-produced automotive parts through standardized processes and inspections.
We use precision grinding to ensure the straightness and surface roughness of hydraulic components, helping our customers achieve more consistent clearance and motion performance.
Aerospace parts are typically made of high-strength materials. We can use grinding services to ensure consistent part dimensions and precise tolerances.
We can control the key mating surfaces and geometric accuracy based on the part’s function. We also support prototype manufacturing and mass production of industrial parts.
Components in the energy industry require the use of difficult-to-machine materials, such as hardened steel. For these materials, we develop customized grinding solutions based on the specifications outlined in the drawings.
Automation equipment has requirements for dimensional accuracy and surface quality of core components. Our precision grinding services can provide automation equipment manufacturers with consistent and reliable component processing solutions.
The tolerance range for precision grinding is typically between ±0.0025 mm and ±0.005 mm.
Extremely high dimensional accuracy; excellent surface quality; high material compatibility.
Rough grinding is primarily used to quickly remove large amounts of excess material. It is highly efficient. Tolerances are typically controlled within ±0.05 mm to ±0.1 mm or even wider, and surface roughness is relatively high.
Precision grinding can help parts achieve extremely high dimensional accuracy (up to ±0.001mm~±0.005mm) and excellent surface quality (Ra as low as 0.1~0.4μm). It typically uses smaller grinding depths, lower feed rates, and finer grit grinding wheels.
It is a grinding process that uses a rotating grinding wheel to perform precision machining on the outer cylindrical surface of a workpiece.
Because the grinding wheel used in the grinding process is composed of countless tiny, randomly distributed abrasive grains, and the amount of material removed by each abrasive grain in each cutting is extremely small. Therefore, this process can achieve smaller material removal units and higher processing resolution than traditional cutting processes.
Relatively low machining efficiency; high machining costs; high risk of thermal damage; certain limitations on workpiece shape and material; grinding wheel wear.
Aluminum oxide grinding wheel.
Industrial-grade gantry-type surface grinder.
