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FAQ:
1. Q: Are you a factory or trading company?
A: We are a factory established in 2011, specializing in manufacturing air expanding shafts.
2. Q: What is the payment term?
A: T/T. Usually, a 30% deposit is required upfront, and the balance is paid before delivery.
3. Q: Which port do you use for shipping?
A: Shanghai Port.
4. Q: What is the delivery time?
A: About 10 working days after confirming the drawings. We can also provide photos of the production status.
Noted: The air pressure used for our air shaft should be between 0.4–0.5 MPa.
We are a professional manufacturer that can design and produce non-standard products according to customer requirements. Please feel free to contact us anytime.
Tel: 400-822-0519
Changzhou Rongjiu Machinery Co., Ltd. was founded in 2011 and now operates under two brands: Rongjiu and AOKS. The company focuses on designing, manufacturing, and marketing products such as chain-type air expanding shafts, tile-type air expanding shafts, key-type air expanding shafts, and safety stirrups for air expansion sets. After years of development, we have a factory covering over 3,000 square meters, equipped with imported processing centers, CNC lathes, cylindrical grinders, and other advanced machinery. Our annual output value has reached nearly 10 million RMB. We continuously improve product structure and manufacturing processes to ensure durability, reliability, and stability. We are committed to brand building and aim to provide high-quality products tailored to customer needs.
We promise first-class quality and efficient service to maintain the vitality of the company. We uphold a human-oriented principle and believe in success through hard work. It is our great hope to satisfy all customers, achieve win-win cooperation, and work together with people from all walks of life to create a better future!
If you are an engineer or understand the technology, I hope you can find the following information helpful. We hope you get the details you need about our products.
Dear everyone, this is Seven Lu. I will introduce the air shaft details below:
An air shaft is a special tool used for winding and unwinding. It features keys on its surface that expand when high-pressure gas is introduced. Users simply inflate the shaft via the air valve. To lock the web, they push the core of the air valve to deflate, causing the keys to return to their original shape, making it easy to remove the web.
Air shafts are widely used in winding, rewinding, and slitting machines across industries such as printing, packaging, plastics, paper, glass, pharmaceuticals, electronics, batteries, and textiles.
Model NO.: RJ-OT-06
Shape: Straight
Shaft Body Material: Aluminum
Key Material: Aluminum
Surface Processing: Hard Anodized
Trademark: Rongjiu / AOKS
Transport Package: Wooden Box
Origin: Jiangsu, China
HS Code: 8479909090
Model | 1 inch | 2 inch | 3 inch | 4 inch | 5 inch | 6 inch |
Non-swelled diameter (mm) | 25 | 50 | 75 | 99 | 125 | 150 |
Swelled diameter (mm) | 27 | 52 | 78 | 102 | 130 | 158 |
Application roll inside diameter (mm) | 25.4–26 | 50.8–51.5 | 75.6–76.8 | 100–101 | 126–128 | 151–156 |
Key number | 2 | 3 | 6 | 8 | 5 | 6 |
Body weight (Steel, kg/m) | 7 | 14 | 18 | 28 | 36 | 51 |
Body weight (Aluminum, kg/m) | 3.5 | 6 | 9 | 16 | 21 | 31 |
Maximum load (Steel, kg) | 40 | 150 | 800 | 1500 | 2000 | 3000 |
Maximum load (Aluminum, kg) | - | - | 500 | 950 | 1300 | 2000 |
Maximum torque (Nm/m) | 100 | 200 | 520 | 1120 | 1330 | 2210 |






FAQ:
1. Q: Are you a factory or trading company?
A: We are a factory established in 2011, specializing in manufacturing air expanding shafts.
2. Q: What is the payment term?
A: T/T. Usually, a 30% deposit is required upfront, and the balance is paid before delivery.
3. Q: Which port do you use for shipping?
A: Shanghai Port.
4. Q: What is the delivery time?
A: About 10 working days after confirming the drawings. We can also provide photos of the production status.
Noted: The air pressure used for our air shaft should be between 0.4–0.5 MPa.
We are a professional manufacturer that can design and produce non-standard products according to customer requirements. Please feel free to contact us anytime.
Tel: 400-822-0519
Changzhou Rongjiu Machinery Co., Ltd. was founded in 2011 and now operates under two brands: Rongjiu and AOKS. The company focuses on designing, manufacturing, and marketing products such as chain-type air expanding shafts, tile-type air expanding shafts, key-type air expanding shafts, and safety stirrups for air expansion sets. After years of development, we have a factory covering over 3,000 square meters, equipped with imported processing centers, CNC lathes, cylindrical grinders, and other advanced machinery. Our annual output value has reached nearly 10 million RMB. We continuously improve product structure and manufacturing processes to ensure durability, reliability, and stability. We are committed to brand building and aim to provide high-quality products tailored to customer needs.
We promise first-class quality and efficient service to maintain the vitality of the company. We uphold a human-oriented principle and believe in success through hard work. It is our great hope to satisfy all customers, achieve win-win cooperation, and work together with people from all walks of life to create a better future!
If you are an engineer or understand the technology, I hope you can find the following information helpful. We hope you get the details you need about our products.
Dear everyone, this is Seven Lu. I will introduce the air shaft details below:
An air shaft is a special tool used for winding and unwinding. It features keys on its surface that expand when high-pressure gas is introduced. Users simply inflate the shaft via the air valve. To lock the web, they push the core of the air valve to deflate, causing the keys to return to their original shape, making it easy to remove the web.
Air shafts are widely used in winding, rewinding, and slitting machines across industries such as printing, packaging, plastics, paper, glass, pharmaceuticals, electronics, batteries, and textiles.
JARRY CNC MACHINERY CO.,LTD , https://www.jarry-machinetool.com