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This section provides an overview for circle feeders as well as their applications and principles. Also, please take a look at the list of 4 circle feeder manufacturers and their company rankings. Here are the top-ranked circle feeder companies as of May, 2026: 1.Transmin, 2.Komachine Inc., 3.TSUBAKIMOTO CHAIN.
Table of Contents
A circle feeder is a stock hopper type powder/pellets feeder with an integrated hopper and agitator blades to prevent bridging. The circle feeder was researched, developed, and manufactured by Yoshikawa Corporation.
It is also known as a circle hopper or table feeder.
Inside the hopper where the circle feeder is installed, the agitator blades rotate, dropping small amounts of powder material from the discharge port at the bottom of the hopper to the feed port of the screw feeder below.
The system has been very successful in preventing bridging and segregation of powder materials.
Circle feeders are used for stable feeding of powder materials from hoppers that store powder materials.
They can handle a wide variety of difficult-to-discharge powder materials, especially those that are fibrous, sludge-like, flaky, lumpy, or bridging.
The circle feeder can provide a closed environment for feeding, and a single circle feeder can simultaneously discharge multiple locations.
Circle feeders and table feeders are table-type powder feeders with a unique structure installed at the bottom of hoppers and silos.
At the bottom part, on a board, flat blades rotate to cut out the powder material to the outer circumference of the hopper or other cylinders.
The powder material brought to the outer circumferential part of the hopper is carried by the blades rotating around the circumference to the outlet.
The dish or vane rotates slowly and continuously in the lower part of the hopper to keep the powder material in motion at all times.
The raw material is fed through the outlet from which it is discharged on the table to the screw feeder below.
It is often used in combination with a twin screw feeder.
The method of adjusting the amount of powder material fed is to first change the rotation speed, then the number of scrappers, and finally the gap between the scrappers.
As for the merits of circle feeders, first, it is difficult to apply force to the powder material, and stable feeding of powder material is possible.
Second, the feed port can be wide and easily sealed, and multiple discharge ports can be installed.
On the other hand, the demerits of the circle feeder are that it is difficult to make it compact, it is not suitable for powders with poor flowability, and it is difficult to adjust the powder and improve feeding accuracy.
*Including some distributors, etc.
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LCI Corp., founded in 1961, located in North Carolina, United States, and is a manufacturer and provider of specialized equipment and systems for various processes such as evaporation, drying, modular systems, extrusion, and spheronization. It offers services including laboratory and pilot plant testing, process design, system integration, and more, indicating that it provides solutions beyond just product distribution. It has achieved various certifications, including a US Patent for evaporator technologies in 2019, re-certification conforming to 3-A Sanitary Standards in 2018, the introduction of new laboratory equipment products in 2016, and individual awards at the iPBS 40th Anniversary Awards in 2016.
Komachine Inc., founded in 2017, is a South Korean manufacturer headquartered in Yongin, Gyeonggido, providing marketing and trading platform for the machine industry. The company operates the Komachine platform, allowing machinery manufacturers to register and showcase their new and replacement machines and parts. The platform connects these manufacturers with global buyers, facilitating transactions and exports at relatively low costs. Currently, there are around 4,000 registered suppliers offering a total of 85,000 products on the platform. Komachine Inc. received the presidential award and ministry awards in South Korea and won international startup competitions like Echelon Asia Summit in Singapore and TechBBQ in Denmark.
Tsubakimoto Chain Co. is a Japan-based manufacturer of power transmission and roller chain products, founded in 1917, and headquartered in Osaka. Their power transmission products include drive chains, conveyor chains, automotive timing drives, sprockets, hose, and cable carrier systems, as well as timing belts, reducers, locking devices, shaft couplings, and clutches. Their products are for power transmission, material handling, factory automation, and physical distribution systems. Tsubakimoto Chain is certified as an Eco-First Company by the Ministry of the Environment.
Ranking as of May 2026
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Transmin |
30.8%
|
| 2 | Komachine Inc. |
20.5%
|
| 3 | TSUBAKIMOTO CHAIN |
20.5%
|
| 4 | LCI Corp. |
17.9%
|
| 5 | YOSHIKAWA Corporation |
5.1%
|
| 6 | Tsubakimoto Chain Co., Ltd. |
5.1%
|
Derivation Method
The ranking is calculated based on the click share within the circle feeder page as of May 2026. 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 (%) |
|---|---|---|
|
Japan
|
2 | 50.0% |
|
United States of America
|
1 | 25.0% |
|
Republic of Korea
|
1 | 25.0% |
