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The Arnold Company is the number one Railcar Gate Door Opener manufacturer in the United States. As home of the Door Demon^® Railcar Hopper Gate Door Opener, we specialize in making custom designed Railcar Gate Door Openers to meet the specific needs of your working environment! We also carry a full line of Industrial Vibrators.

We take pride in our product selection, product quality, and personalized customer service! We offer our customers affordable, practical solutions to their Railcar Gate Door Opener needs and stand behind our products!


Top 10 Reasons: Check out the why your Rail Car Gate Door Opener should come from us!

Information Request Form: Request more information on any of our products today using our quick and simple form!



Frequently Asked Questions: Browse our FAQ section to get answers to the most frequently asked questions, as well as gain valuable insight for your decision-making process!

Arnold Company Door Opener Products are proudly produced in the U.S.A.

URYU Motor Overhauling Service

Figure 1. Before (used)

Figure 2. After (overhauled)

We offer overhauling service for 1½" URYU impacting pneumatic motors commonly used by other makers of hopper gate openers like POGO and Workmaster. We stock most of the parts needed for quick turn-around service. Figure 1 (left) and Figure 2 (right) are before and after overhauling, respectively. Please Contact Us if you have URYU motors that need overhauling if you have any questions about this service.

General Hopper Gate Opener Repair Service

POGO Openers

ATP Openers

Workmaster Openers

At The Arnold Company, we do our best to meet your special repair needs, including the repair of other manufactured railcar hopper gate door openers. Contact Us if you have repair or service needs for any hopper gate door opener.

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