Pneumatic connection technology

Rotor connections

Aventics rotary unions transfer compressed air between a stationary pipe connection and a rotating machine component. The programme comprises five variants in nominal bores NW7 and NW12: NW7 rotary unions for speeds up to 550-1100 rpm and NW12 rotary unions for 700-1000 rpm, plus a high-speed NW12 variant up to 3000 rpm. All variants are available with male or female thread connections (M suffix = metric, U suffix = alternative flange version).

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Buying guide

How to choose Rotor connections

What matters when choosing: properties, comparison and typical applications.

Variants and speed ranges

Part number	Nominal bore	Speed	Version
3531070000	NW12	700-1000 rpm	Standard
3531170000	NW12	3000 rpm	High-speed
3531080010	NW7	550-1100 rpm	Variant M
3531080030	NW7	550-1100 rpm	Variant M
3531080040	NW7	550-1100 rpm	Variant M

Technical features

⚡ Speed up to 3000 rpm (NW12) - high-speed variant for spindles and fast-rotating drives

⚙ Two nominal bores NW7 and NW12 - for different flow rates and machine sizes

✓ Pressure-tight rotating connection - no tube whip or disconnection at rotating drives

📦 Multiple connection variants - M and U versions for different flange and thread systems

⚙ Compact design - small footprint at shaft face or flange connection

Typical applications

Typical applications: Compressed air supply to rotating clamping systems (pneumatic chucks) on CNC lathes, air purge supply to tool spindles in machining centres, pneumatic supply to rotary tables in indexing machines and transfer lines, compressed air feed at robot joints (rotary feed-through), and rotating pneumatic grippers in handling and palletising systems.

FAQ

Frequently asked questions about Rotor connections

What are rotor fittings used for?

Rotor fittings are used in pneumatic systems to ensure secure and efficient connections for air flow management.

Which industries benefit from pneumatic connection technology?

Industries like manufacturing, automotive, and industrial automation benefit from pneumatic connection technology.

What makes Aventics a reliable choice for pneumatic fittings?

Aventics is known for high-quality products and innovative solutions in pneumatic technology.

How do I select the right rotor fitting for my application?

Consider factors like pressure requirements, connection types, and compatibility with existing systems.

Can rotor fittings be used in hydraulic systems?

Rotor fittings are primarily designed for pneumatic systems, but consult a specialist for potential hydraulic applications.

What maintenance is required for pneumatic fittings?

Regular inspection and cleaning are essential to ensure optimal performance and prevent leaks.

Are Aventics rotor fittings available worldwide?

Aventics products are widely available through distributors like ESD Equipment and can be shipped internationally.