RF rotary joint
Servotecnica SVTS A 06 RF rotary joint
RF capsule slip ring passing coaxial signals up to 3 GHz for HD video and CCTV, with up to 24 signals.
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Key specifications
| Circuits (max) | 24 |
|---|---|
| Voltage (max) | 240 V |
| Speed (max) | 100 rpm |
| Outer diameter | 22–22 mm |
| Ingress protection | IP51 |
| Temperature | -20–80 °C |
| Data / bus | RF up to 3 GHz, HD video 1080p / 3G-SDI |
| Rated life (revolutions) | 3,000,000 |
Summarised in our own words from Servotecnica SpA's published data; series maxima, individual models vary. Last checked 2026-10-29. Source 1
Notes on this data
Connectors MMCX/SMA/SMB/MCX/BNC; cables RG174/RG178/RG179/RG316. Life 3x10^6 rev.
Specify Motion is not affiliated with Servotecnica SpA. Servotecnica and SVTS A 06 are used only to identify the product. Comparisons use published figures; always confirm against the current datasheet.
Servotecnica SVTS A 06 replacement and alternative options
Use these supply-network options as a starting point for an engineering check. We can also help source the original Servotecnica part. Published series figures do not establish an exact-model or drop-in replacement: confirm ratings, fit, interfaces and approvals for your application.
Electrical slip rings with up to five built-in RF channels for radar and satellite antennas, grouped in the catalogue with cable-reel slip rings for cranes and masts.
| Published maximum | SVTS A 06 | RF Integrated Electrical Slip Ring / C… |
|---|---|---|
| Circuits | 24 | — |
| Current per circuit | — | 50 A |
| Speed | 100 rpm | 300 rpm meets or exceeds |
| Voltage | 240 V | — |
| Bore | — | 275 mm |
RF rotary joints that carry microwave signals across rotation for antennas and radar, with one to five channels. Single-channel models run to 50 GHz.
| Published maximum | SVTS A 06 | RR Series Radio Frequency Rotary Joint |
|---|---|---|
| Circuits | 24 | — |
| Speed | 100 rpm | 500 rpm meets or exceeds |
| Voltage | 240 V | — |
Figures are the highest published for each series and are not always measured the same way. A higher figure is not automatically a better choice: mounting, duty cycle, feedback, connectors and approvals matter too. An engineer will check the fit against your application before recommending anything.
Typical applications
What a RF rotary joint is
An RF rotary joint passes radio-frequency or microwave signals across a rotating interface, typically for antennas and radar. Coaxial designs use a concentric inner and outer conductor that rotate relative to each other, keeping a controlled impedance, usually 50 ohms, through the joint. Waveguide designs handle higher power at microwave frequencies. Multi-channel joints stack several channels coaxially, and many can be combined with an electrical slip ring for power and control circuits.
When engineers choose a RF rotary joint
Choose an RF rotary joint when the rotating part carries an antenna, transmitter or receiver whose signal must stay at RF rather than being converted to data first. It is standard on radar pedestals, satellite antenna positioners and communications masts. The trade-offs are frequency, power and channel count: higher frequencies and more channels make the joint harder to build. Where the signal can be digitised on the rotor, an Ethernet or fibre channel may be simpler.
How to specify the Servotecnica SVTS A 06
Send these with your enquiry and an engineer can confirm the right SVTS A 06 variant or an equivalent:
- Frequency range (GHz)
- Number of channels
- Average and peak power (W)
- VSWR and insertion loss, including variation with rotation (dB)
- Isolation between channels (dB)
- Connector types, such as SMA, N or TNC, or waveguide flange
- Speed (rpm) and any electrical slip ring circuits to integrate
Common mistakes to avoid
- Specifying insertion loss but not its variation, or wow, during rotation
- Underestimating peak power for pulsed radar
- Choosing connectors that do not suit the frequency range
- Leaving channel isolation undefined in multi-channel joints
Servotecnica SVTS A 06: frequently asked questions
Can you help replace Servotecnica SVTS A 06 or source the original?
Send the full model code, quantity and required date. Our engineers can check original-part availability and assess suitable alternatives, including supply-network options where appropriate. We confirm compatibility and any changes needed before recommending a replacement.
What is the Servotecnica SVTS A 06?
RF capsule slip ring passing coaxial signals up to 3 GHz for HD video and CCTV, with up to 24 signals. Published series figures include circuits 24, voltage 240 V, speed 100 rpm, outer diameter 22 mm. It is made by Servotecnica SpA; Specify Motion can help source it or propose an equivalent.
Who makes the Servotecnica SVTS A 06?
The Servotecnica SVTS A 06 is made by Servotecnica (Servotecnica SpA) and is listed here for engineers comparing options. Specify Motion is not affiliated with Servotecnica SpA; brand names are used only to identify the product.
What is the circuits of the Servotecnica SVTS A 06?
The published series maximum circuits is 24. Individual models and sizes in the SVTS A 06 range vary, so check the exact variant against your duty cycle, mounting and environment, or ask our engineers to confirm the right size for you.
Is there an alternative to the Servotecnica SVTS A 06?
We can assess suitable replacement options. On published figures, Motion Control Products RF Integrated Electrical Slip Ring / Cable Reel Slip Ring and Motion Control Products RR Series Radio Frequency Rotary Joint are options to assess from our supply network. An engineer confirms the fit against your application before recommending anything.
What is VSWR in an RF rotary joint?
Voltage standing wave ratio measures how well the joint matches the line impedance, usually 50 ohms. A value of 1:1 means a perfect match, and higher values mean more signal is reflected. For a rotary joint, the maximum VSWR across the frequency band and its variation during rotation both matter, so ask for both figures on the datasheet.
Can an RF rotary joint be combined with a power slip ring?
Yes. The RF channel usually sits on the axis, with an electrical slip ring arranged around it for power, control and data circuits. This is common on radar and antenna pedestals. Specify both together, including frequencies, power levels and electrical circuits, so the supplier can manage isolation and the overall envelope.
Further reading: How to select a slip ring · Slip rings
Engineer support
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Tell us how you use the Servotecnica SVTS A 06: the load, speed, duty and environment. Our engineers will confirm whether it is still the right part, find it for you, or propose an alternative that fits better.
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How it works
From enquiry to delivery
Send a part number or describe the application. Our engineers take it from there: the right product, a clear quotation, and delivery and support arranged.
- 01Tell us what you needSend a part number, or configure the application, quantities and timing.
- 02An engineer reviews itWe check the specification and find the original part, a checked equivalent or a complete axis.
- 03Receive your quotationProducts, pricing, lead time and compatibility notes in one reply.
- 04Order and deliveryWhen you are happy, the order is placed and delivery and after-sales support are arranged.