Custom Built Products

Custom Unions

Rotary Systems will design and build a custom rotary union for your specific application. Our design team has over 35 years of combined experience in the rotary union business and has designed and manufactured over 700 custom rotary unions. Several of these custom rotary unions are in stock for immediate delivery.

Our unions will transfer your media, handle your system pressure and temperature, operate at your rotational speeds and fit within your overall envelope size. We accomplish this with our extensive knowledge and experience with material selections, seal type and compounds, specialized coatings and plating processes.

Some of the industries served are:

• Semiconductor • Plastic Molding • Food and Beverage Processing
• Dairy • Paper Processing • Packaging Equipment
• Off-shore Reels • Robotics • Construction
• Work-holding • Defense • Medical
• Construction • Steel processing • Nuclear

Please contact one of our application engineers at 1-800-959-0146 to discuss your custom rotary union application.

Some of the examples of custom rotary unions are listed below:

Food Grade Applications
Rotary Systems designs and manufactures a variety of custom rotary unions for food grade applications. The union pictured is constructed from 300 series stainless steel and utilizes a precision ground shaft, special seals, and dual radial ball bearings. (read more)
Large 3 Passage Union for Industrial Crane
3 passage rotary union for crane application. This union is designed with large bearing support to withstand high side loading.
(read more)
Wafer Processing Custom Rotating Unions
The union pictured is a custom multiple passage union that is used in the wafer processing industry. The union is manufactured from stainless steel.
(read more)
Over-the-Shaft/Through Bore Rotary Union
Rotary Systems designs and manufactures a line of standard and custom over-the-shaft rotary unions. The custom rotary union shown is constructed from carbon steel ,utilizes a precision ground shaft, radial ball bearings and Teflon seals. This is a two passage rotary union with 1/4” passages and a four inch bore through the rotor. It was designed for a high pressure hydraulic indexing application. (read more)

Coil Processing
Rotary Systems’ inline dual flow unions are designed for both high and low pressure applications. The unions utilize a hardened and precision ground shaft, impregnated Teflon seals with o-rings and dual radial ball bearings to prevent side loading to the seals. (read more)
Low Torque Air/Vacuum Rotary Unions
Rotary Systems offers a unique line of low torque air/vacuum rotary unions. These unions are designed specifically for low speed, low pressure, air/vacuum applications that require minimal torque. These units are offered in 2,4,6 and 8 passages as a standard product that we stock. (read more)

Workholding Unions
Rotary Systems’ new line of work-holding unions are available in two, four and six passage models. These unions are designed with #4 SAE threads on both the radial and axial locations on the shaft and in the housing. These unions are a direct retro-fit to other work-holding and clamping suppliers that provide these unions in their fixtures. (read more)
12-Passage Rotary Union
Rotary Systems’ custom twelve passage rotary union is manufactured from carbon steel. This union utilizes a hardened and precision ground shaft, Teflon seals and radial ball bearings. The connections are .250" NPT threads. This unit is available for pneumatic, hydraulic or water service. (read more)

High Pressure Double Acting Swivel
Single passage 10,000 PSI double acting swivel. This swivel was designed to handle high pressure grease and hydraulics with 2 axis of movement for an industrial hand tool. (read more)
12 Passage Air Rotary Union with 10-32 Threads
12 passage air union that is designed specifically for air and vacuum service.
(read more)
Rotary Union for Plastic Injection Molding Machine
Rotary Systems provides a number of standard and custom multiple passage rotary unions for plastic molding equipment OEM's. The union pictured is a large custom four passage with ferrule connections for an air and water application. (read more)
Custom 6 Passage Stainless Steel Rotary Union
Custom six passage flange style stainless steel rotary union for the CMP semi-conductor industry. (read more)

1036 McKinley Street Anoka MN 55303