Quality Control Process 

MONTON Bearing chooses only the best steel factories as reliable partners. Through strict controls, spot and system audits and quality reviews, we will only work and sign agreements with the best suppliers.


MONTON Bearing Company requires all raw material suppliers to provide quality certificates with each lot. All lots are checked and validated by our quality control department. These procedures guarantee that all materials comply with strict quality controls. The end result is a quality product that will meet the customer’s specifications.

Heat Treatment

Heat treatment is a critical process for bearing manufacturers.MONTON Bearing Company has the capability to provide customers with through hardening, case hardening and induction hardening.


Surface Treatment

Similar to heat treatment, surface treatment is another special process during the manufacturing. MONTON Bearing Company uses automatic surface treatment production lines, to strictly control all process parameters (such as temperature and PH value), computer online control and data collection, and  chart analysis, which provides good, stable process control.


MONTON Bearing Company’s main surface treatment techniques are phosphate and black oxide.

Additional surface treatments such as chrome plating, zinc plating, zinc cobalt plating, and more are also available. All treatments comply with environmental standards and salt spray requirements.


The grinding process is used to refine the bearing surfaces to the specifications required for a long bearing life. Our CNC grinding machines guarantee reliable production results. Additionally, we use modern centralized cycling station for the cooling liquid used on our production lines. 


Assembling Process

For our products with high precision (for example, deep groove ball bearings), we use a dust free assembly room to guarantee a clean environment. We utilize automated assembling equipment for matching balls and rings, maintaining proper grease fill volume and for sealing/shielding operations.


Visual inspection

The visual inspection is the start of our quality control checks. A trained eye can quickly determine any discrepences or visual faults to the material or assembly.


Inner and Outer Tolerance Testing

The inner and outer tolerance test measures the precise dimensions of the bearing. Our strict tolerances are again set according to the ISO standards.


Noise Testing

Highly sensitive microphones measure and identify audible peaks of a rotating bearing. These peaks can indicate faults to the raceways or possible grease pollution.


Vibration Testing

Using high, medium and low range frequencies, the vibration test can identify a range of bearing defects, such as imbalance, play and misalignment.


THIELENHAUS for bearing Superfinish 


Fully automatic MICROFINISH machine for machining of raceways on ball or roller bearings, inner and outer rings, according to single or two step method.

Other monton test instrument:

Surface roughness test




Length measuring instrument


Bearing test center


Bearing Life Testing Machine


Bearing inner and outer diameter measuring instrument


Measuring instrument for radial swing and groove side swing of finished bearing inner ring


Vernier caliper


Internal dial indicator


External micrometer


Micrometer caliper


Our  Equipment&Technical Center


Advanced equipment and strong technical support to improve our products, ensure we supply the best quality bearing and best service to every MONTON customer.