Harbin Rainbow Technology designs and manufactures a full range of high-speed automatic flat die thread rolling machines for the global fastener industry. As core supporting equipment paired with cold heading machines in screw and bolt production lines, the CY series machines form threads through cold plastic deformation of metal workpieces, replacing traditional thread cutting process with superior thread density, wear resistance and dimensional accuracy.

Core Advantages

• Fully Automatic Production: Integrated with vibratory bowl feeding system, the machine runs continuously with minimal manual intervention. Small-diameter models reach a production speed of 165–185 pieces per minute, effectively improving output and reducing labor cost.
• High Forming Precision: Precision-ground alloy thread dies and stress-relieved heavy cast iron frame ensure consistent thread quality, fully compliant with ISO, DIN, ANSI and other international thread standards.
• Durable & Low Maintenance: Heavy-duty gearbox transmission with automatic lubrication system features low noise, high wear resistance and stable performance, suitable for long-term uninterrupted industrial operation.
• Full Model Coverage: The product line includes CY05X, CY06Z, CY10Z, CY16Z, CY30Z and other specifications, covering processing diameter from 3mm to 30mm, to match different capacity and specification demands of fastener factories.

With over 30 years of experience in the fastener equipment industry, Harbin Rainbow Technology provides one-stop production solutions including cold heading machines, wire drawing equipment and electroplating lines. All thread rolling machines are CE certified, backed by 12 months warranty, English operation guidance and lifelong after-sales technical support, and have been widely adopted by fastener manufacturers across the world.

We have more than 30 years experiences in supplying all kinds of fastener equipment, such as Bolt Maker, Nut Maker, Cold Heading Machine, Thread Rolling Machine, Wire Drawing Machine, Heat Treatment Furnace and Zinc Plating line, etc. to customers all over the world.

Rainbow full production of Spring washer making machine. we have all sizes equipment for 3mm, up to above 33mm spring washers.

Harbin Rainbow Technology Co.,Ltd is one of the biggest fastener equipment dealer and manufacturer in China. We have invested one Cold former factory(Ningbo), one Thread rolling machine factory(Ningbo), one Heat treatment furnace factory(Suqian) and one Electro plating equipment factory(Wuxi).

We have more than 30 years experiences in supplying all kinds of fastener equipment, such as Bolt Maker, Nut Maker, Cold Heading Machine, Thread Rolling Machine, Wire Drawing Machine, Heat Treatment Furnace and Zinc Plating line, etc. to customers all over the world, With our reputation increasing and our team becoming more professional, we have experienced a significant growth in business during the recent years.

Nowadays, more and more reputed companies compete in a long-term cooperation with us.We abide by the principles of honesty, credibility, and mutual-benefit. Our motto is “ONCE BUSINESS, FOREVER FRIENDS”, we will do our best to serve clients at home and abroad. Due to our top-notch professional knowledge and rich trad experience, we have seen our market developing ability and actual business growth with an increasingly faster pace. We sincerely look forward to working with you. Let's build a great future together!

Harbin Rainbow Technology Co.,Ltd is one of the biggest fastener equipment dealer and manufacturer in China.
We have more than 30 years experiences in supplying all kinds of fastener equipment, such as Bolt Maker, Nut Maker, Cold Heading Machine, Thread Rolling Machine, Wire Drawing Machine, Heat Treatment Furnace and Zinc Plating line, etc. to customers all over the world.

Harbin Rainbow Technology Co.,Ltd is one of the biggest fastener equipment dealer and manufacturer in China.We have more than 30 years experiences in supplying all kinds of fastener equipment, such as Bolt Maker, Nut Maker, Cold Heading Machine, Thread Rolling Machine, Wire Drawing Machine, Heat Treatment Furnace and Zinc Plating line, etc. to customers all over the world.

Composition entire heat treatment line as follows:
Automatic feeder → → washing machine before
Hardening furnace oil quenching tank → →
Rear wiper steel furnace → →
Electrical control cabinet.
Buyers can flexiblely composition processing lines, due to the different needs

China manufacturer nuts and bolts cold forging machine power hammer forging hex bolt making machine

Net weight: 700kg
Cutter motor: 1.1Kw
Vibrator motor: 1.1Kw
Pump: 400W
Speed: 80-350 pieces/minute
Cutting speci: out dia 40-80mm;
               inner Dia 16mm

Place of Origin: China
Application: Machinery & Hardware & Others
Condition: New
Video outgoing-inspection: Provided
Machinery Test Report: Provided
Marketing Type: Ordinary Product
Warranty of core components: One Year
Brand Name: Rainbow
Voltage: 380V
Warranty: One Year
Applicable Industries: Manufacturing Plant, Machinery Repair Shops, Other.
Packaging Details: Plywood Cases

Composition entire heat treatment line as follows:
Automatic feeder → → washing machine before
Hardening furnace oil quenching tank → →
Rear wiper steel furnace → →
Electrical control cabinet.
Buyers can flexiblely composition processing lines, due to the different needs

Rainbow full production of Spring washer making machine. we have all sizes equipment for 3mm, up to above 33mm spring washers.

Trimetal Composite Contact Cold Header can make six different metals be compounded together under cold state to produce composite contacts according to the technique requirements. Its working process includes the following steps: Sending two different kinds of metal wire into the machine firstly, transmitting them into the mould after being cut off. Then by two times upsetting process, the two kinds of metal become the composite contacts. Finally, the products retreat from the mould and enter into the finished product box.

Composition entire heat treatment line as follows:
Automatic feeder → → washing machine before
Hardening furnace oil quenching tank → →
Rear wiper steel furnace → →
Electrical control cabinet.
Buyers can flexiblely composition processing lines, due to the different needs

Model: CY06Z
Diameter range: 3-6mm
Output: 165-185pcs/min
Max. thread length: 75mm
Moving die size: 90x105x25
Power: 4Kw

high quality hydraulic forging press bolt making machine power hammer cold forging machine

Composition entire heat treatment line as follows:
Automatic feeder → → washing machine before
Hardening furnace oil quenching tank → →
Rear wiper steel furnace → →
Electrical control cabinet.
Buyers can flexiblely composition processing lines, due to the different needs

Place of Origin: China
Application: Machinery & Hardware & Others
Condition: New
Video outgoing-inspection: Provided
Machinery Test Report: Provided
Marketing Type: Ordinary Product
Warranty of core components: One Year
Brand Name: Rainbow
Voltage: 380V
Warranty: One Year
Applicable Industries: Manufacturing Plant, Machinery Repair Shops, Other.
Packaging Details: Plywood Cases

Harbin Rainbow Technology is a leading fastener equipment manufacturer with over 30 years of specialized experience in the industry. We own four production bases in Ningbo, Suqian and Wuxi, specializing in the research and development, manufacturing and sales of complete fastener production lines. Our machines have been exported to more than 50 countries including the United States, Germany, South Africa, Brazil and India, earning high recognition from global customers.

Our automatic nut making machines are engineered for high efficiency, high precision and long-term stability, making them the ideal choice for fastener manufacturers worldwide. We offer a complete range of nut production equipment from cold heading machines to tapping machines, capable of producing all types of nuts from M2 to M30. Our machines feature a four-spindle dual servo drive system that ensures stable operation and high tapping accuracy up to 0.02 millimeters, with a production speed of 200 to 350 pieces per minute, which is 30 percent more efficient than traditional models. The heavy-duty cast iron body undergoes strict aging treatment to eliminate internal stress and extend service life, and the fully automatic operation from material feeding to finished product requires only one operator.

Our machines can produce various types of nuts including hex nuts, flange nuts, lock nuts, square nuts, weld nuts and coupling nuts, using materials such as carbon steel, stainless steel, copper, aluminum and alloy steel. They are widely used in the automotive, construction, machinery, electronics and furniture industries.

All our machines are CE and ISO 9001 certified and undergo strict 72-hour continuous running tests before delivery. We provide a one-year whole machine warranty, lifetime technical support, online video guidance and remote troubleshooting, as well as engineers available to service machinery overseas and customized mold design and turnkey production line solutions. Contact us today for a free quote and let us help you build a high-efficiency nut production line.

Place of Origin: China
Application: Machinery & Hardware & Others
Condition: New
Video outgoing-inspection: Provided
Machinery Test Report: Provided
Marketing Type: Ordinary Product
Warranty of core components: One Year
Brand Name: Rainbow
Voltage: 380V
Warranty: One Year
Applicable Industries: Manufacturing Plant, Machinery Repair Shops, Other.
Packaging Details: Plywood Cases