China Internal Thread Machining Manufacturers Factory Suppliers
Through cooperation with world-renowned companies, we continue to catch up with international benchmark companies and improve the competitiveness of our Production CNC Turning, Flat Surface Grinding, Internal Thread Machining. We have improved Internal Thread Machining quality and production efficiency, reduced labor intensity and production costs through technological advances. Our company is dedicated to helping businesses achieve their goals through innovative solutions. With the continuous expansion of scale and increasing market complexity, effective product performance control is the key to improving product quality and economic benefits. Our commitment to innovation means that we are constantly seeking new and better ways to serve our customers, with cutting-edge products and solutions that meet their needs and exceed their expectations. All our staff welcome friends from all walks of life to visit, guide and negotiate business, and create a better future. At the same time, we promote industry exchanges, improve our own level, and accelerate our integration with international standards.
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Thread Machining
Thread machining covers multiple processes for creating internal and external threads — rolling, milling, cutting, and grinding. Each method serves different applications: rolling cold-forms...
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Cold Extrusion
Cold extrusion is a precision metal forming process that shapes material by forcing it through or around a die under high pressure at room temperature. Unlike cold heading, which upsets material...
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Bending and Forming
Bending and forming is a sheet metal fabrication process that uses press brakes and specialized tooling to create angled, channeled, and contoured profiles from flat sheet stock. Unlike stamping —...
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CNC Turning
CNC turning produces cylindrical components with ±0.02mm accuracy — from Φ2mm pins to Φ500mm shafts, up to 1000mm in length. We machine stainless steel, carbon steel, alloy steel, aluminum, and...
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Multi-axis CNC Machining
Multi-axis CNC machining handles complex geometries in a single setup — eliminating multiple clampings and the tolerance errors they introduce. We run 3-axis, 4-axis, 5-axis simultaneous, and...
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Internal Spline Broaching
Internal spline broaching is a high-precision machining process that uses a multi-tooth tool — the broach — to cut internal spline profiles in a single pass. Each successive tooth removes a...
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Spline and Gear Hobbing
Hobbing is a continuous generating process that uses a helical cutting tool — the hob — to produce splines, spur gears, and helical gears with consistent tooth geometry across production runs....
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Internal and External Cylindrical Grinding
Cylindrical grinding is a finishing process that uses abrasive wheels to refine external (OD) and internal (ID) surfaces of round components — achieving tighter tolerances and better surface...
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Surface Grinding
Surface grinding uses a rotating abrasive wheel to produce flat surfaces with high dimensional accuracy and fine finish — removing oxide layers, correcting distortion, and preparing parts for...
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Phosphating and Coating
Phosphating is a chemical conversion coating process that treats ferrous metal surfaces with a dilute solution of phosphoric acid and other chemicals, converting the metal surface into an integral...
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Cold Extrusion Dies
We design, manufacture, and maintain cold extrusion dies entirely in-house — from geometry definition to carbide selection, heat treatment, surface coating, and ongoing repair. This vertical...
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Hot Forging Dies
We design, manufacture, and maintain hot forging dies entirely in-house — from geometry definition and hot-work tool steel selection to heat treatment, surface engineering, and ongoing repair....
We have started to use your products, which are really good and meet our requirements.
Shipping was fast, just in time for my customer's order period.
We evaluated the products soon after we received them, and the results showed that they were very easy to use and stable, so we hope that future cooperation will continue to satisfy both parties.
My customers are deeply impressed by the quality of these products. They say these products look beautiful, but they didn't expect them to be so cheap.
Since we used the products of this company, our production efficiency has increased immediately, and the equipment has almost no failures. Their excellent service is also an important reason why we
Your designer listened to our suggestions and gave us a lot of help. We really appreciate him.
Our company mainly operates High Precision Cold Header Dies, Internal Spline Broaching, Seat Recliner Release Wire‑Form Rod Assembly, and provides convenience to customers with high-quality, low-price wholesale, retail, OEM, design, production, and other services. This business model has witnessed our growth and progress, and will also guide our future development and improvement. Ningbo Fenghua Bolong Machinery Manufacturing Co., Ltd. is one of the most professional internal thread machining manufacturers and suppliers in China, also supports high quality customized service. With abundant experience, we warmly welcome you to buy durable internal thread machining made in China here from our factory.


















