Your Satisfaction, Our Promise.
Your Satisfaction, Our Promise.
Chun Zu has been a pioneer in the cold forming industry for over four decades, continually refining our technology to meet the precise needs of manufacturers around the world. Our CBF Bolt Forming Machines represent the pinnacle of this ongoing innovation, offering unmatched precision and efficiency specifically tailored for the automotive and construction industries. As Taiwan’s fastener industry has expanded, Chun Zu has developed one of the most comprehensive and reliable lineups of bolt formers available on the market today.
The CBF series is designed to excel in cold forming applications, ensuring that bolts are produced with superior accuracy, strength, and consistency. This makes our machines particularly valuable for the automotive industry, where precision and durability are paramount. Similarly, in the construction industry, the ability to produce high-quality bolts that meet stringent safety standards is critical, and Chun Zu’s CBF machines deliver just that.
Our bolt forming machines are equipped with advanced technology that enhances production efficiency, reduces material waste, and minimizes downtime—key factors in maintaining a competitive edge in both the automotive and construction sectors. Whether you’re producing standard bolts or custom-designed fasteners, Chun Zu’s CBF series is engineered to handle a wide range of specifications, making it the go-to choice for manufacturers seeking reliable and cost-effective cold forming solutions.
With over 10,000 units of our machines shipped to more than 50 countries, Chun Zu has built a global reputation for quality and customer satisfaction. Our CBF Bolt Forming Machines are trusted by leading manufacturers in the automotive and construction industries for their durability, performance, and ease of use. When you choose Chun Zu, you’re investing in a legacy of excellence in cold forming, backed by decades of experience and a commitment to your success.
Experience the difference that Chun Zu’s CBF Bolt Forming Machines can make in your production process, and see why we are the preferred partner for cold forming solutions in the automotive and construction industries.
Review the specifications of our flagship models
No. of Forging Stations |
Max. Forging Load (Kg) |
Max. Cut-off Diam. (mm) |
Max. Cut-off Length (mm) |
Max. Speed (ppm) |
P.K.O Stroke (mm) |
K.O Stroke (mm) |
Motor Power (hp) |
Cut-off Die Diam. (mm) |
Punch Die Diam. (mm) |
Main Die Diam. (mm) |
Machine Weight (Kg) |
Nominal Bolt Size (mm)Min.Max. |
Shank Length (mm)Min.Max. |
|||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
CBF-43S |
3 | 16,000 | Ø5 | 66 | 300 | 10 | 56 | 10 | Ø38x30L | Ø31x65L | Ø38x85L | 5,600 | 2 | 4 | 6 | 50 |
CBF-63S |
3 | 35,000 | Ø8 | 70 | 260 | 12 | 52 | 15 | Ø30x45L | Ø40x90L | Ø50x85L | 7,500 | 3 | 6 | 10 | 50 |
CBF-83S |
3 | 60,000 | Ø10 | 75 | 240 | 12 | 52 | 20 | Ø53x56L | Ø45x95L | Ø60x80L | 10,000 | 5 | 8 | 15 | 50 |
CBF-83L |
3 | 60,000 | Ø10 | 135 | 180 | 16 | 115 | 25 | Ø30x50L | Ø45x140L | Ø60x150L | 14,000 | 5 | 8 | 25 | 107 |
CBF-103S |
3 | 80,000 | Ø12 | 105 | 200 | 15 | 80 | 25 | Ø45x59L | Ø53x115L | Ø75x108L | 14,000 | 6 | 10 | 15 | 70 |
CBF-103L |
3 | 80,000 | Ø12 | 192 | 140 | 15 | 162 | 30 | Ø45x59L | Ø53x112L | Ø75x200L | 19,500 | 6 | 10 | 30 | 152 |
CBF-133S |
3 | 115,000 | Ø15 | 145 | 160 | 26 | 102 | 40 | Ø63x69L | Ø60x130L | Ø86x135L | 19,500 | 8 | 12.7 | 20 | 100 |
CBF-133L |
3 | 115,000 | Ø15 | 250 | 100 | 25 | 230 | 40 | Ø55x70L | Ø60x179L | Ø86x265L | 31,000 | 8 | 12.7 | 70 | 210 |
CBF-44S |
4 | 16,000 | Ø5 | 66 | 300 | 10 | 56 | 10 | Ø42x30L | Ø31x65L | Ø38x85L | 6,500 | 2 | 4 | 6 | 50 |
CBF-64S |
4 | 40,000 | Ø8 | 95 | 240 | 12 | 80 | 20 | Ø30x45L | Ø40x90L | Ø50x110L | 10,000 | 3 | 6 | 10 | 75 |
CBF-84S |
4 | 60,000 | Ø10 | 100 | 200 | 19 | 85 | 30 | Ø35x50L | Ø45x115L | Ø60x120L | 14,500 | 5 | 8 | 15 | 77 |
CBF-104S |
4 | 80,000 | Ø12 | 133 | 160 | 20 | 110 | 30 | Ø45x59L | Ø53x115L | Ø75x135L | 18,000 | 6 | 10 | 15 | 102 |
CBF-104L |
4 | 80,000 | Ø12 | 185 | 150 | 30 | 160 | 40 | Ø45x59L | Ø53x115L | Ø75x185L | 21,000 | 6 | 10 | 20 | 152 |
CBF-134S |
4 | 120,000 | Ø15 | 140 | 150 | 26 | 102 | 40 | Ø63x69L | Ø60x130L | Ø68x135L | 21,000 | 8 | 12.7 | 20 | 100 |
CBF-134L |
4 | 120,000 | Ø15 | 190 | 120 | 30 | 160 | 50 | Ø63x69L | Ø60x178L | Ø86x190L | 26,000 | 8 | 12.7 | 25 | 152 |
CBF-134LL |
4 | 120,000 | Ø15 | 285 | 80 | 30 | 280 | 50 | Ø55x70L | Ø60x229L | Ø86x305L | 38,000 | 8 | 12.7 | 75 | 262 |
CBF-164S |
4 | 210,000 | Ø18 | 195 | 110 | 30 | 170 | 60 | Ø60x90L | Ø75x185L | Ø100x190L | 43,000 | 10 | 16 | 20 | 152 |
CBF-164LL |
4 | 210,000 | Ø18 | 350 | 70 | 46 | 320 | 75 | Ø64x100L | Ø75x185L | Ø100x345L | 60,000 | 10 | 16 | 100 | 305 |
CBF-204S |
4 | 350,000 | Ø23 | 195 | 95 | 46 | 170 | 75 | Ø75x120L | Ø90x215L | Ø125x200L | 62,000 | 12 | 20 | 25 | 152 |
CBF-204L |
4 | 350,000 | Ø23 | 240 | 80 | 46 | 220 | 75 | Ø75x120L | Ø90x215L | Ø125x240L | 62,000 | 12 | 20 | 25 | 200 |
CBF-204LL |
4 | 350,000 | Ø23 | 360 | 65 | 46 | 325 | 100 | Ø75x120L | Ø90x215L | Ø125x345L | 75,000 | 12 | 20 | 100 | 305 |
CBF-254S |
4 | 430,000 | Ø26 | 253 | 70 | 40 | 175 | 125 | Ø80x130L | Ø120x270L | Ø140x250L | 105,000 | 14 | 25.4 | 35 | 175 |
CBF-254L |
4 | 430,000 | Ø30 | 320 | 62 | 46 | 280 | 125 | Ø99x150L | Ø120x270L | Ø148x300L | 131,000 | 16 | 25.4 | 60 | 254 |