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This section provides an overview for rolling mills as well as their applications and principles. Also, please take a look at the list of 12 rolling mill manufacturers and their company rankings. Here are the top-ranked rolling mill companies as of December, 2024: 1.International Rolling Mills, 2.Williams Patent Crusher and Pulverizer Co., Inc., 3.Butech Bliss.
Table of Contents
Rolling mills are used in steel mills to stretch steel.
Rolling is the process of stretching steel. The final thickness of the steel produced in a mill determines the number of rolling mills. Rolling mill stretches the steel by crushing it between motor-driven rolls, controlling the thickness (width) to a target value, which varies from product to product.
During rolling, it is important to stretch the iron that has been heated in the furnace before lowering the temperature.
Rolling mills are used to stretch steel. The main flow of rolling mills varies from mill to mill, but generally there are one to five roughing mills that roughly stretch the thick steel coming out of the furnace, followed by five to eight finishing mills that finish the steel to the actual thickness of the product.
Rolling mills can be broadly classified into roughing mills and finishing mills. Some roughing mills are equipped with a function called reverse rolling, in which the rolled steel is returned to the front of the rolling mill and rolled again in the same rolling mill. This method allows thick steel to be rolled to a certain degree of thinness.
The rolling mill stretches the steel between two rolls, which must be pressed down in order to stretch the steel. The pressing function is called "pressing down" and is driven electrically or hydraulically.
In order to control the thickness at the exit of each rolling mill, a position sensor or other device is attached to the screw or other parts of the roller if it is electrically driven. By linearly detecting the position, the amount of pressure drop is calculated to determine the material thickness.
In the case of hydraulic pressing, the material thickness is calculated by linearly monitoring the position of the cylinder inside the pressing equipment. Mainly, roughing mills often use only electric pressure reduction, while finishing rolling mills often use a combined electric and hydraulic pressure reduction system.
In finishing mills, the control method called automatic gap control (AGC) is also used, which is based on thickness feedback in combination with thickness gauges, such as X-rays and γ-rays, to eliminate errors from the target thickness. Therefore, AGC control is performed in combination with these factors as well.
The following are the main types of rolling mills used in the rolling process.
Two-High Rolling Mill is the simplest type of rolling mill, with two rolls (working rolls) on the top and bottom, and is used for rough rolling of 20mm to 30mm and thin sheet rolling.
A 4-high rolling mill consists of two additional rolls (support rolls) added to the working rolls of a 2-high rolling mill. 4-high rolling mills do not use four rolls to roll metal, but rather sandwich the working rolls between the support rolls. The support rolls hold the deflection of the working rolls, enabling highly accurate processing.
A multi-stage rolling mill is a rolling mill with more working rolls than a 4-stage rolling mill. Multi-stage rolling mills come in a variety of shapes and sizes, and each has many working rolls, enabling the processing of hard metals under high pressure. In addition, the shaft diameter of the rolls can be reduced for processing, making it possible to roll extremely thin materials such as silver foil.
Rolling mills are classified into three types: hot rolling, cold rolling, and warm rolling, depending on the temperature at which the rolling process is performed.
1. Hot Rolling
Hot rolling is a rolling process in which the metal is heated to 900°C to 1,200°C to soften it for easier processing. The metal is then passed through rolls and rolled.
The high temperatures result in a material with good workability and tenacity. However, the surface becomes whitish due to oxidation.
2. Cold Rolling
Cold rolling is a method of rolling at room temperature. The temperature is not heated as in hot rolling, but the heat generated in the metal rolling process raises the temperature somewhat.
The dimensional accuracy is higher than that of hot rolling, and the surface is shiny.
3. Warm Rolling P
The warm rolling process is an intermediate rolling method between hot rolling and cold rolling. It produces a finish that compensates for the disadvantages of hot rolling and cold rolling. It is often used in the production of aluminum foil.
*Including some distributors, etc.
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Williams Patent Crusher and Pulverizer Co., Inc., established in 1871, is a manufacturer based in the United States, specializing in size reduction equipment. The company offers a diverse product line, including crushers, pulverizers, and shredders, that meet the needs of multiple industries worldwide. Its target audience includes industries such as mining, power generation, and recycling. It has a broad network of clients, including notable companies like General Electric and Boeing. It holds over 500 patents and trademarks12, demonstrating its strength to engineer new and innovative designs for crushing machines that meet the needs of clients worldwide.
Butech Bliss is a manufacturer based in Ohio, the United States, specializing in the design and production of metal processing equipment. Established in 1985, the company facilitates solutions in the metal forming and coil processing industry. Its product portfolio includes rolling mills, cut-to-length lines, and material handling equipment. Serving industries like automotive and aerospace, the company is certified with ISO 9001 and provides machinery for shaping and processing metal sheets.
International Rolling Mills, a company established in 1978, is based in Pawtucket, Rhode Island, as a manufacturer of precision rolling mills and slitters. It specializes in manufacturing rolling mills, precision slitters, annealing furnaces, continuous casters, and bull blocks. It also manufactures auxiliary equipment such as decoilers, brushing machines, flatteners, and wire drawing machines. Its products are utilized for the mining, metal processing, and manufacturing industries across the USA. The company is a Machinery Dealers National Association member and has partnerships with the United States Navy, Apple Inc., and General Motors.
FENN, established in 1900, is a projecting manufacturer and supplier based in Newington, Connecticut. Specializing in metal forming machinery, FENN offers an array of products, including rolling mills, wire flattening and shaping lines, and swaging machines. These precision-engineered solutions find utility across diverse industries, empowering material processing and shaping operations globally. FENN's enduring promise to modernization, quality, and customer support has solidified its position as a global leader in the metal forming machinery sector.
Machinery International Corp. is a distributor and supplier of industrial machinery, specializing in pre-owned metalworking and fabricating equipment, based in Connecticut, United States. The company works in sourcing and supplying a range of machinery, including rolling mills, presses, and forging equipment. Its offerings cater to various industries, such as manufacturing and metal fabrication, where pre-owned machinery provides cost-effective solutions for production needs. The company supports industries globally in acquiring efficient and dependable machinery for metalworking processes.
JP Steel Plantech Co. is a manufacturer of steel plant engineering established in 2001 and based in Yokohama, Japan. It specializes in manufacturing iron-making machine equipment like CDQ, water-sealed circular coolers, and continuous castings like slab and billet casters. It also manufactures rolling mills, RH vacuum degassers, electric furnaces, plate shears, and tension levelers. The company is a joint venture of four companies, namely JFE Engineering, Kawasaki Heavy Industries, Hitachi Zosen, and Sumitomo Heavy Industries, and has acquired the ISO 9001:2015 certification. Its products serve steel manufacturing, construction, and metalworking industries across India, China, and Japan.
Vaid Engineering Industries is a manufacturer based in India, specializing in tube mill machinery since its establishment in 1998. The company, holds certifications in ISO 9001, and works on providing solutions for the tube and pipe manufacturing industry, and it specializes in manufacturing tube mills, slitting lines, and precision tube welding equipment, such as cold rolling mills for sheet, strip & coils, hot rolling mills, rolling mills for stainless steel, aluminum rolling mill, among others. Catering primarily to the steel and construction sectors, its machinery facilitates tube production for various applications.
STEEFO ENGINEERING CORPORATION is a manufacturer based in India, specializing in the production of rolling mill machinery and allied equipment. Established in the year 2012, the company delivers solutions for the steel rolling industry. Its product portfolio includes rolling mills, shearing machines, and gearboxes, such as rolling mill for TMT bars, rolling mill for section induction furnaces, continuous casting machines and wire rod lines, serving the steel sector with precision engineering solutions. The company holds ISO 9001 certification and caters to industries such as construction and automotive, where its machinery is crucial for shaping and processing steel.
A.S. Precision Machines Private Limited is a manufacturer based in India, specializing in the production of rolling mill plants and equipment. Established in the year 1980, the company, certified with ISO 9001, provides comprehensive solutions for the metal rolling industry. Its portfolio includes a range of products such as rolling mills, coil processing lines, and steel plant equipment. Catering primarily to the steel and metal processing industries, the company's machinery finds application in processes like rolling, annealing, and coil handling.
Opdel SNC is a manufacturer based in Northern Italy, founded in 1976 through a collaboration between Italy and Switzerland that specializes in producing gold machinery, specifically induction melting furnaces for continuous casting. The company's diverse portfolio is organized into divisions and it includes induction melting furnaces for continuous casting, resistance furnaces for annealing, belt furnaces, equipment for platinum casting, and advanced finishing machinery for surface treatment. The Ceramic and Graphite Division, under the Te.ker brand, supplies products for the gold market. The Finishing Division (MF Metalfinishing) handles surface finishing and treatment, along with consumables and equipment.
XIAN HANI TECH CO., LTD, established in China in 2003, is a manufacturer and supplier in the field of steel rolling mill machinery. Specializing in rolling mill equipment and accessories, the product range encompasses various components vital to steel production processes, such as rolling mills, rolling mill stands, and associated machinery. The company plays a pivotal role in the global steel manufacturing, offering advanced solutions for efficient steel manufacturing. It serves as an important partner for steel producers worldwide, contributing to the advancement of the steel manufacturing sector.
American Steel Products is a distributor of steel products that is headquartered in Toledo, Ohio and was established in 1953. The company serves varied machine-needing industries which are used and built to order metal machinery. The company provides solutions to end-users through used coil processing machinery. The company offers machinery, parts, and services ranging from edging lines, hot and cold rolling mills, cut-to-length lines, slitting line machinery, and press feed lines.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | International Rolling Mills |
15.0%
|
| 2 | Williams Patent Crusher and Pulverizer Co., Inc. |
11.3%
|
| 3 | Butech Bliss |
10.2%
|
| 4 | American Steel Products |
9.6%
|
| 5 | FENN |
8.8%
|
| 6 | Machinery International Corp. |
7.9%
|
| 7 | JP Steel Plantech Co. |
7.5%
|
| 8 | Vaid Engineering Industries |
6.8%
|
| 9 | Opdel snc |
6.4%
|
| 10 | XIAN HANI TECH CO., LTD |
5.9%
|
Derivation Method
The ranking is calculated based on the click share within the rolling mill page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
5 | 50.0% |
|
India
|
3 | 30.0% |
|
Japan
|
1 | 10.0% |
|
China
|
1 | 10.0% |
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