Welcome to the Tianjin JINMEI Technology Co.,Ltd website!


The complete process of our mandrel bar is done under one roof only.
No process is outsourced; we control every step of the production chain to secure the highest quality. 


CNC lathe

Lathes are designed to remove material from workpieces by exposing them to a cutting tool. 
The workpiece is secured to the lathe, at which point it rotates while pressing into a cutting tool.
The rotational movement of the workpiece allows for the fast, efficient and precise removal of material.
CNC lathes are used for machining parts across a wide range of industries, and they are much more efficient than other methods such as multispindles.

Threading Machine

Thread machining is one of the most important applications in a CNC machining center. It is a subtractive method used in making external and internal threads of different sizes. This machining occurs through the circular movement of a rotating tool calibrated with the required thread depth and density. The primary function of a thread is to act as a coupling agent between two mechanisms. During the coupling process, motion between parts occurs. A thread has different parts. These include the crest, root, Helix angle, pitch, and flank. Let us examine these parts in detail.

Polishing Machine

Innovative machine for surface preparation and mirror polishing process on straight and
 bent tubes with special belts carrying liquid polishing paste.

Chrome Plating Machine

Also known as chromium plating, chrome plating is a finishing process that involves the application of chromium onto the surface of a metal workpiece or object. From wheels to doorknobs and cutlery and vases, it’s used for in a variety of manufacturing applications.   It’s essentially an electroplating technique that, like other electroplating techniques, requires an electrical charge. To apply a layer of chromium onto a workpiece or object, a manufacturing company must apply an electrical charge to a tub or container filled with chromium anhydride. The electrical charge triggers a chemical reaction in which the chromium deposits itself onto the surface of the workpiece or object.