CNC Contract Grinding

EMAG Production specializes in precision machining of complex metal components. We combine modern CNC grinding technology, experienced production planning, qualified specialists, and robust quality assurance into a stable manufacturing process. CNC contract grinding is particularly well-suited for components in the fields of mechanical engineering, machine tool manufacturing, drive technology, and special-purpose machine construction, where ground surfaces perform a direct function.

As a contract manufacturer with a high degree of vertical integration, EMAG Production manufactures components and assemblies in-house and covers technologies such as turning, grinding, gear cutting, and other precision processes.

An overview of our grinding services

Process Typical Applications Customer Benefits
Flat Grinding End faces, guide surfaces, contact surfaces, machine components High flatness, clean surfaces, reproducible dimensional accuracy
Cylindrical grinding Shafts, bushings, spindle components, rotationally symmetric parts Precision diameters, concentricity, precise fits
Hirth-tooth grinding Flat gear teeth, coupling and positioning surfaces Exact pitch, repeatable positioning, high dimensional accuracy
Universal internal and external grinding Functional bores, external contours, bearing and sealing surfaces Combination machining of complex geometries
Contract grinding service at EMAG Production – CNC grinding for precision running and functional surfaces
Contract grinding services at EMAG Production for precision CNC grinding

Surface grinding

In CNC surface grinding, we perform the machining of functional surfaces with high precision. With the ELB-SCHLIFF SWP 320/150, we can achieve grinding lengths of up to 3,200 mm, grinding widths of up to 1,500 mm, a grinding height of up to 850 mm, and a table load capacity of up to 4,000 kg. This makes EMAG Production the right partner even for large-format mechanical engineering components, base bodies, plates, slides, and complex parts with demanding reference surfaces.

CNC surface grinding of large components – precision functional surfaces for mechanical engineering components
CNC surface grinding of large-format functional surfaces - precision machining of plates, slides, and base bodies with a grinding length of up to 3,200 mm

Cylindrical grinding​

CNC cylindrical grinding is the right choice when diameter, roundness, cylindricity, and surface quality must be reliably maintained. Our cylindrical grinding machine can machine workpieces with a grinding length of 2,000 mm, a center distance of 260/310 mm, and a maximum workpiece weight of 1,200 kg.

For larger and more complex grinding tasks, the EMAG RB 320 complements our machine fleet. It offers a grindable diameter of up to 700 mm, a center distance of up to 2,000 mm, and a workpiece weight of up to 3,000 kg between centers, as well as an external and an internal grinding spindle.

CNC grinding of a main spindle – precision cylindrical grinding for high-quality spindle components
Highest precision in CNC cylindrical grinding of main spindles. The process produces dimensionally accurate functional surfaces for demanding spindle components.
CNC Internal Grinding of a Bearing Housing – Precision Machining for Perfectly Fitting Functional Bores
CNC internal grinding of bearing housings for precision bores and mating surfaces

Hirth-tooth grinding​

Hirth tooth profiles place the highest demands on part accuracy, flank quality, and flatness. Hirth tooth profile grinding produces form-fit flat-tooth gears that can transmit high torques and enable repeatable positioning of components.

Elb Schliff Micro Cut grinding machine for machining Hirth tooth profiles.
State-of-the-art CNC grinding technology for producing high-precision Hirth tooth profiles with optimal surface quality, exact pitch, and high process reliability.
Work area of an Elb Schliff Micro Cut grinding machine with a clamped workpiece during Hirth-tooth grinding.
The work area is designed for high-precision machining of Hirth tooth profiles. Thanks to precision guides, robust workholding technology, and controlled grinding, the highest requirements for dimensional accuracy, flank quality, and repeatability are met.

Quality assurance for every function-critical dimension

CNC contract grinding doesn’t end at the machine. Verified proof of the required quality is crucial. EMAG Production has a state-of-the-art metrology lab, documented measurement processes, and qualified specialists. Function-critical dimensions are inspected; measurement reports document the process from manufacturing through final assembly.

The quality assurance team uses tactile coordinate measuring technology in the climate-controlled measurement room and can inspect small prototypes as well as large and heavy steel or cast components.

Why choose EMAG Production for CNC contract grinding?

  • Modern CNC grinding machines for flat, cylindrical, internal, and external grinding tasks
  • Machining of small components through to large and heavy workpieces weighing several metric tons
  • Experience with precision components from the machine tool industry
  • In-depth understanding of functional surfaces, fits, and tooth profiles
  • Documented quality assurance using state-of-the-art measurement technology
  • Streamlined processes through work planning, manufacturing, and inspection

CNC contract grinding with technical advisory service

Whether it’s a single part, a prototype, a replacement part, or a recurring series: EMAG Production supports customers in the cost-effective implementation of demanding grinding tasks. Based on drawings, 3D data, material, tolerance specifications, and surface requirements, we assess technical feasibility and select the appropriate grinding process. Anyone seeking high-precision CNC contract grinding with robust quality assurance and industrial manufacturing experience will find EMAG Production to be a capable partner for surface grinding, cylindrical grinding, and Hirth gear grinding.

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