This is a loaded question because there is not one standout screw conveyor manufacturers, there are several major players, several who are really good in one area and lots of others just trying to make a living. At the core of the screw conveyor industry are CEMA parts. These are parts that conform to the CEMA dimensional standards (CEMA 300). Since these parts are standardized, there are several manufacturers whose core business is producing these parts at the lowest possible costs. A good way to find out more about any of these companies is to view their website and give them a call. 
The list below starts with the major players in the screw conveyor industry. These are manufacturers who are sales leaders and active in CEMA. The remainder of the list are other screw conveyor manufacturers who probably do a good job with their customer bases but are not widely known across the industry,
Note: This information here is the OPINION only of www.screwconveyorparts.com and not to be confused with actual facts. If you have any additional insight into to any of the companies below or want to make an edit please email us as [email protected]
Major Players (In alphabetical order)
- Screw Conveyor Parts, LLC (Fort Worth, TX) – SCP is a relatively new entry into the screw conveyor world but they bring a staff with a high level of screw conveyor application, engineering and manufacturing knowledge. SCP strives to offer the best products at the lowest prices in the most convenient way possible.
- Conveyors Inc (Mansfield, TX) – As one of the largest manufacturers of screw conveyor parts and systems, Conveyors Inc is able to bring together CEMA and proprietary parts to serve its customers. Conveyors Inc has a very experienced staff who’s knowledge allows them to put together screw conveyors for almost any traditional screw conveyor application. Conveyors Inc’s prices are very competitive and their no thrills approach to screw conveyors is greatly appreciated by their loyal customer base.
- KWS Manufacturing (Burleson, TX) – As one of the largest manufacturers of screw conveyor parts and systems, KWS is able to bring together CEMA parts, proprietary parts and specialty systems to serve its customers. KWS tends to be a little higher on price but have the ability to take on really complicated projects with success. KWS has a large engineering staff and are the go-to manufacturer if you want a screw conveyor to operate at high temperatures, in a funky configuration or as an ASME pressure vessel.
- Martin Conveyor (Mansfield, TX) – As one of the largest manufacturers of screw conveyor parts and systems, Martin is able to bring together CEMA and proprietary parts to serve its customers. Martin is the most well-known name in the screw conveyor industry and is owned by Martin Sprocket and Gear. Martin has a long history and is responsible for spawning almost all the other screw conveyor companies in the Fort Worth, TX area. Martin is all about manufacturing lots of standard parts and selling them at competitive pricing. They have a rich history of experience to draw from for almost any traditional screw conveyor application.
- Screw Conveyor Corp (Hammond, IN) – Also known as SCC or Screw Corp, Screw Conveyor Corp must be pretty large since at one time they had manufacturing facilities in four locations, including Mexico. SCC is very active in the industry and they have the predominate expert in bucket elevator design running the engineering department. Screw Conveyor Corp is a well-established company and has a large knowledge base in several specialty conveying applications including chain conveyors and bucket elevators.
The Other Folks (In alphabetical order)
- Austin Mac (Seattle, WA) – Austin Mac is a specialty screw conveyor manufacturing serving the Pacific Northwest. Their main customers are paper and pulp and some food customers. Austin Mac is not seen much outside of their core territory but are well known in it.
- Continental Conveyor (Thetford Mines, Quebec) – Continental Conveyor’s success fluctuates with the rise and fall of the Canadian dollar. They primarily serve the Canadian market but do branch into the United States occasionally. There biggest competitive advantage is in Canada and in traditional screw conveyor applications.
- Conveyance Solutions by Continental (St. Joseph, MO) – Also known as CSC, they have been bought and sold a few times in the last 10 years and have seen their market share shrink dramatically since their glory days in the 1990s. Some of their best talent has retired over the last ten years and they have struggled to replenish. CSC’s name is still well known in the industry thanks to years of successful screw conveyor projects.
- Conveyor Engineering and Manufacturing (Cedar Rapids, IA) – Conveyor Engineering makes a variety of products, not just screw conveyor parts. Some of their parts are really innovative and even used by other screw conveyor manufacturers to strengthen their own offerings. Conveyor Engineering seems to be a custom manufacturing shop with emphasis on specialty applications for screw conveyors.
- Industrial Screw Conveyer (Burleson, TX) – ISC has gone through a lot of change int he last few years with a new owner and a new direction. No longer solely focused on screw conveyors, ISC is also looking for contract fabrication and steel projects.
- Orthman Conveyors (Lexington, NE) – Orthman’s market presence fluctuates year to year. They have a core set of customers and offer a wide product line to serve them. Orthman does well in traditional screw conveyor applications. They recently added a manufacturing facility in Burleson, TX.
- Thomas Conveyor (Burleson, TX) – Thomas is a shell of what they used to be. Thomas has gone through several ownership changes in the last 20 years and is currently owned by Martin Conveyor. Thomas still has a well-known name and serves their shrinking customer base well for standard screw conveyor applications.
- WAM Group (Fort Worth, TX) – WAM Group is an Italian process equipment company out of Europe. In Europe they offer an extensive product line to serve many powder bulk material handling and processing needs. They have attempted to bring these products to the United States over the years with very little success. Their revolving door of Italian leadership has made it difficult for them to establish a foot hold in the US market. A few areas they do well are in cement and some shaftless screw conveyor applications.