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Harbin Rainbow Technology Co., Ltd.Address:C2-02 Handi Building,Songbei Distr.,Harbin,ChinaPostal Code:150028Web site address:http://www.fastenerequip... Contact Now
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What is Cold Forging – Cold Forging Process, Materials, Uses, Advantages & Disadvantages

Working principle of nut tapping machine

Nut tapping machine is a kind of machining equipment that processes internal threads, screws or teeth buckles on the inner side of the holes of variou...

Thread Rolling

The Complete Guide to Zinc Plating: All You Need To Know

Tightening bolts can not be ignored friction can cause problems to solve the problem

fortensionbolt, The friction force is a factor to be reckoned with. Bolt friction joint has been in existence, it may be part of the reason that cause...

Difference between hot dip zinc and hot dip galvanising

Hot-dip zincing and hot-dip galvanising are two different processes for corrosion protection of metals, with hot-dip zincing usually providing better ...

When to Use Spring Washers: A Comprehensive Guide

What Is Cold Forming?

What's self-tapping screw?

Self-tapping screws: similar to machine screws, but the threads on the screw for special self-tapping screws with threads. Used to fasten the connecti...

Analysis of the principle and function of spring washers

In all kinds of mechanical connections, the anti-loosening of bolts is a very important link, and there are many ways to prevent loosening of bolts in...

Keywords : Made in China

China 2026 China Manufacturer Hot Sale Fully Automatic Bolt Forging machine manufacturer

2026 China Manufacturer Hot Sale Fully Automatic Bolt Forging machine

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

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China 2026 Rainbow Good Price Spring Washer Making Machine manufacturer

2026 Rainbow Good Price Spring Washer Making Machine

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

We can provide a whole line to make spring washer. The spring wahser production line contains cutting machine, belt wire drawing machine, rolling up machine, coil collection machine.

 Spring washer machine it include three parts :

1 step,drawing the round wire to belt wire machine.

2 step,rolling up machine.

3 step, cutting machine.

More
China 2026 Rainbow High Speed Fully  Automatic Screw Making Machine manufacturer

2026 Rainbow High Speed Fully Automatic Screw Making Machine

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

More
China 2026 Heat Treatment Furnace Industrial Mesh Belt Furnace Line manufacturer

2026 Heat Treatment Furnace Industrial Mesh Belt Furnace Line

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

More
China 2026 Fully Automatic 4 station Cold Forging Machine Bolt Making Machine manufacturer

2026 Fully Automatic 4 station Cold Forging Machine Bolt Making Machine

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!

More
China 2026 Fully Automatic RBF-84S M5-M8 Bolt Making Machine manufacturer

2026 Fully Automatic RBF-84S M5-M8 Bolt Making Machine

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!

More
China 2026 High quality Good Price Screw Making Machine Cold Forging Machine manufacturer

2026 High quality Good Price Screw Making Machine Cold Forging Machine

Model RSH8-90
Max. Blank Diameter (mm) 8
Max. Blank Length (mm) 90
Max. Cut off Length (mm) 120
Stroke (mm) 130
Output (Pcs/Min) 80-90
Main Die Diameter (mm) Φ60X120
Punch Die Diameter (1st) (mm) Φ40X120
Punch Die Diameter (2nd) (mm) Φ40X120
Cut off Die Diameter (mm) Φ28X45
Cutter Size (mm) 12X42X90
Main Motor Power (KW) 10HP/7.5KW
Machine Size (L*W*H) (m) 3.60X1.60X1.80
Approx Weight (Kgs) 4800

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China 2026 Factory Good Price Fully Automatic Nail Making Machine manufacturer

2026 Factory Good Price Fully Automatic Nail Making Machine

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 Electroplating 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!

More
China 2026 Hot Sale 4 Spindle Fully Automatic Nut Tapping Machine manufacturer

2026 Hot Sale 4 Spindle Fully Automatic Nut Tapping Machine

China 2026 Hot Sale 6 Station M18-M24 Nut Making Machine manufacturer

2026 Hot Sale 6 Station M18-M24 Nut Making Machine

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.

More
China Rainbow Hot Sale Screw Cold Heading Machine Automatic Bolt Maker manufacturer

Rainbow Hot Sale Screw Cold Heading Machine Automatic Bolt Maker

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

More
China Rainbow Automatic 4 Spindle Nut Tapping Machine High Speed Nuts Tapper manufacturer

Rainbow Automatic 4 Spindle Nut Tapping Machine High Speed Nuts Tapper

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.

More
China Rainbow Automatic 6 Station Spare Parts Making Machine High Precision Nuts Cold Forging Machine manufacturer

Rainbow Automatic 6 Station Spare Parts Making Machine High Precision Nuts Cold Forging Machine

High speed nut former, nut making machine,nut forging machine to make hex,flange, nylock nut and special nut parts.

More
China Rainbow High Quality Mesh Belt Continuous Furnace Energy Saving Heat Treatment Furnace manufacturer

Rainbow High Quality Mesh Belt Continuous Furnace Energy Saving Heat Treatment Furnace

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

More
China Rainbow High Precision 1 Die 2 Blow Screw Cold Heading Machine Automatic Bolt Making Machine manufacturer

Rainbow High Precision 1 Die 2 Blow Screw Cold Heading Machine Automatic Bolt Making Machine

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

More
China 2026 Rainbow Multi Station Cold Forging Machine Automatic Spare Parts Making Machine manufacturer

2026 Rainbow Multi Station Cold Forging Machine Automatic Spare Parts Making Machine

Model

Unit

RBF-164S

RBF-204L RBF-254SL

Forging force

Kgs

220,000

380,000 450,000

Max cut-off dia

mm

18

23 26

Max cut off length

mm

195

240 255

Speed range

pcs/min

70-110

50-80 40-70

P.K.O Stroke

mm

30

45 35

K.O stroke

mm

170

220 215

Main slide stroke

mm

260

346 330

Main motor

kw

55

75 110

Cut-off die size

mm

60*90L

75*120L 80*130L

Punch die size

mm

75*185L

90*215L 120*270L

Main die size

mm

100*190L

125*240L 140*250L

Die pitch

mm

120

140 160

Main weight

kgs

40,000

62,000 103,000

Normal bolt size

mm

10-16

12-20 14-25.4

Shank length of blank

mm

20-150

25-200 35-200
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China Rainbow High Speed Tri-metal Composite Contact Rivet Making Machine manufacturer

Rainbow High Speed Tri-metal Composite Contact Rivet Making Machine

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.

 

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China Rainbow High Speed Spring Washer Making Machine Automatic Wire Drawing Machine Cutting Machine manufacturer

Rainbow High Speed Spring Washer Making Machine Automatic Wire Drawing Machine Cutting Machine

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

We can provide a whole line to make spring washer. The spring wahser production line contains cutting machine, belt wire drawing machine, rolling up machine, coil collection machine.

 Spring washer machine it include three parts :

1 step,drawing the round wire to belt wire machine.

2 step,rolling up machine.

3 step, cutting machine.

More
China Rainbow Automatic Screw Cold Heading Machine High Speed 1 Die 2 Blow Bolt Making Machine manufacturer

Rainbow Automatic Screw Cold Heading Machine High Speed 1 Die 2 Blow Bolt Making Machine

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

More
China 2026 Hot Sale Nuts Tapping Machine Automatic Nuts Threading Machine manufacturer

2026 Hot Sale Nuts Tapping Machine Automatic Nuts Threading Machine

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.

More
China Automatic High Quality Nut Making Machine for M30 High Efficiency Spare Parts Making Machine manufacturer

Automatic High Quality Nut Making Machine for M30 High Efficiency Spare Parts Making Machine

High speed nut former, nut making machine,nut forging machine to make hex,flange, nylock nut and special nut parts.

More
China High Speed Multi Station Cold Former for M12 M14 Hex Nut Former for Nut manufacturer

High Speed Multi Station Cold Former for M12 M14 Hex Nut Former for Nut

High speed nut former, nut making machine,nut forging machine to make hex,flange, nylock nut and special nut parts.

More
China Long Service Life High Precision Nut Forming Machine with 6 Station manufacturer

Long Service Life High Precision Nut Forming Machine with 6 Station

High speed nut former, nut making machine,nut forging machine to make hex,flange, nylock nut and special nut parts.

More
China M20 Automatic High Precision 6 Station Nuts Making Machine manufacturer

M20 Automatic High Precision 6 Station Nuts Making Machine

High speed nut former, nut making machine,nut forging machine to make hex,flange, nylock nut and special nut parts.

More
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