perfect concentricity
begins at the centre
making the perfectly round workpiece
Discover more about our high-precision grinding process and its central role within your entire manufacturing chain in modern production environments. Gain in-depth insights into the key requirements for perfect runout, maximum dimensional accuracy, and consistently reproducible quality.
Benefit from optimized manufacturing processes, reduced tolerances, improved surface finish, and maximum process reliability. See how precision center grinding enhances efficiency, minimizes scrap rates, and sustainably improves the performance of your cylindrical grinding operations.
Application of Center Grinding Machines
Precision that Makes Processes Controllable
Where rotating components must deliver maximum performance, precision begins at the center. Center grinding machines from Henninger create the geometric reference on which economical manufacturing and maximum runout accuracy are built.
The quality of the center hole determines how smoothly and stably a workpiece runs between centers — and therefore directly influences the performance of all downstream processes. Precision center grinding establishes a highly accurate and repeatable reference surface, minimizing deviations, reducing variation, and largely eliminating external influencing factors.
The Result is Measurable:
- Consistent runout accuracy
- Reduced grinding allowance
- Shorter machining times
- Less rework and scrap
- Predictable quality — independent of operator influence
Center grinding is therefore far more than a preparatory step. It is the key to stable processes, higher productivity, and long-term manufacturing efficiency.
Typical Applications
Drive Technology & Gear Manufacturing
Precisely running gearbox, motor, and pump shafts form the foundation of modern drive systems. Center grinding ensures the required runout accuracy and significantly reduces downstream cylindrical grinding effort.
Energy & Turbine Engineering
In turbines and rotating energy systems, precision directly determines efficiency and service life. Perfect centering ensures stable running behavior even under extreme loads.
Compressor & Pump Industry
In screw compressors, the precision of the rotor shafts directly affects compression performance. High runout accuracy improves energy efficiency and overall system effectiveness.
Machine Tools, Spindles & Lead Screw Production
Whether for new production or repair of machine and lead screws, precisely ground centers ensure exact bearing seats and functional diameters. The result is spindle systems with maximum runout accuracy, optimal bearing performance, and long-term stable operation — the foundation of precision in mechanical engineering.
Center grinding machines from Henninger do not only deliver micron-level accuracy — they create trust in every single step of the manufacturing process.
Runout Accuracy
Center grinding machines are primarily used wherever the highest level of runout accuracy is required. The quality of the center hole directly determines how precisely a workpiece rotates between centers. Even the smallest imperfections in the center can lead to imbalance, vibration, increased wear, or functional issues in later applications.
By grinding the centers, a precise and stable reference is created, forming the foundation for accurately running shafts, spindles, and rotors.
Workpiece Machining Between Centers Determines the Quality of:
- Runout accuracy
- Imbalance
- Running noise
- Wear
product examples:
- Gear shafts
- Motor shafts
- Spindles
- Pump shafts
- Turbine shafts
industries:
- Automotive
- Aerospace
- Mechanical engineering
- Energy sector
coaxiality of several diameters
Many precision components feature multiple functional diameters that must lie exactly on the same axis, such as bearing seats, sealing surfaces, or gear teeth. The center hole acts as a common reference system for all machining steps. Center grinding ensures that all geometries remain coaxial and prevents axial misalignment from building up throughout the manufacturing chain.
When a component has multiple functional diameters, they must:
- Lie exactly on the same axis
- Remain stable across multiple machining operations
product examples
- Multi-stage gearbox shafts
- Bearing seats combined with gear teeth
- Spindles with multiple seating surfaces
- Tool holders
without precision grinded centres:
- Axial offset
- Bearing issues
- Increased noise development
parallelism and straightness on long shafts
Especially in long, slender shafts, even minor centering errors can have a significant impact on component geometry. Inaccurate centers may lead to deflection, lack of parallelism, or vibrations during machining. By using precisely ground center holes, the workpiece is accurately aligned, ensuring stable machining conditions and high form accuracy across the entire length.
parts:
- Thin shafts
- Long axles
- Slender rotor parts
- Drive shafts
- Pressure rollers
- Spindle shafts
- Rotors
without perfect centres:
- Deflection
- Vibrations
- Grinding errors
- Geometric inaccuracy
- Instable machining conditions
an indispensable process for functionality efficiency precision success
the process for a perfect product
Repeatability in Re-Clamping
In practical production environments, workpieces often pass through multiple machining steps on different machines. During these processes, they must be re-clamped repeatedly without any change in position. Ground center holes provide a permanently repeatable reference, ensuring that the component can always be positioned with exact consistency.
This significantly increases process reliability, reduces scrap rates, and enables stable, automatable manufacturing workflows.
examples:
- Multiple machining operations across different machines
- Transport between production steps
- Turning → heat treatment → grinding
- Cylindrical grinding after heat treatment
- Gear cutting after pre-machining
Post-Heat Treatment Machining
After hardening processes such as induction or furnace hardening, workpieces often distort, and center holes lose their original accuracy. As a result, key reference points required for further precision machining are no longer reliable. Center grinding makes it possible to restore these references with high precision, re-establishing a stable geometric basis for all subsequent grinding and finishing operations.
after hardening:
- The workpiece may become distorted
- Center holes can be damaged or lose accuracy
- The reference system is no longer reliable
examples:
- Hardened gearbox shafts
- Spindles after induction hardening
- Hardened tool holders
high pecision and premium applications
In highly demanding applications, the quality of the center hole is critical for the achievable overall accuracy of a component. For precision parts such as machine tool spindles, turbine shafts, or measuring shafts, even the smallest deviations directly affect functionality, service life, and performance.
Center grinding is therefore an essential key technology for creating a highly accurate and stable reference axis, enabling the reliable achievement of micrometer-level tolerances.
examples:
- Machine tool spindles
- Aerospace rotor components
- Turbocharger shafts
- Precision measuring shafts