This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD50X50S, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAU replacement uses the same profile body, bore, stroke, force and SC-series mounting. It moves to the current CMSG / DMSG / EMSG sensor switches (the SU used CS1-B / DS1-B) and adds the SAUF valve-integrated option.
Airtac SUD Series Double Rod Cylinder SUD50X50S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X50S is a double-acting profile-type standard cylinder with a Ø50mm bore and 50mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD50X50S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X50S
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SUD Series Double Rod Cylinder SUD50X50S
The AirTAC SUD50X50S is a double-acting double-rod profile cylinder featuring a 50mm bore and 50mm stroke. A rod exits both ends of the extruded aluminium barrel on a single piston, meaning both faces use the rod-side area and push/pull force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This SUD model is discontinued; the direct replacement is the SAUD50X50S, which matches the 1/4" port, M16x1.5 rod thread, and 21mm cushions. The rear rod provides an anti-rotation benefit and can carry a sensor cam for dual-tool driving.
The built-in piston magnet (-S) supports legacy CS1-B/DS1-B switches, whereas the SAUD replacement uses current CMSG/DMSG/EMSG sensors. Note that a plain cylinder does not hold loads on air loss; the adjustable cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac SUD Series Double Rod Cylinder SUD50X50S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X50S |
| Bore size | Ø50 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max standard stroke | Up to 1200 mm |
Specifications follow the official AirTAC SU datasheet (now discontinued). The SAUD50X50S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAUD50X50S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUD Series Double Rod Cylinder SUD50X50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SU-family variants: SUD (double rod), SUJ (adjustable stroke) — each maps to its SAU equivalent (SUD→SAUD, SUJ→SAUJ). The current SAU line adds the SAUF valve-integrated option.
Where the Airtac SUD Series Double Rod Cylinder SUD50X50S Is Used
Dual-Tool Machining Station
Drives two opposing tools simultaneously from one actuator, using the equal both-ways force to ensure consistent machining pressure on both sides of a workpiece.
Anti-Rotation Transfer Pusher
Transfers parts across a belt using the second rod end to mount a sensor cam, relying on the double-rod geometry to prevent rotational drift during the extend stroke.
Compact Vertical Lift Gate
Lifts a 42 kg gate assembly using the 50mm bore profile body, saving axial space compared to standard cylinders while providing stable vertical guidance.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X50S with the SAUD50X50S
To replace the discontinued SUD50X50S, specify the SAUD50X50S direct upgrade, which retains the exact 50mm bore, 50mm stroke, equal-both-ways force, 1/4" port, and FA/LB mounting. When sizing both ways, verify the 825 N @0.5 MPa output fits your load, or step to neighbouring bores (63mm or 40mm) to adjust force. A double rod is right when you need anti-rotation stability or want to drive two tools from one actuator. If your stroke is 300mm or longer, confirm the side-load limits of your guide bearings. For the -S magnet option, note the sensor change from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG on the SAUD.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X50S
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S): sensor family CS1-B → CMSG
- ✓ Mounting reused (FA/FB/CA/CB/LB)
- ✓ Need a built-in valve? → SAUF
Airtac SUD Series Double Rod Cylinder SUD50X50S FAQ
Yes, the SUD50X50S is discontinued. The direct replacement is the SAUD50X50S, which matches the 50mm bore, 50mm stroke, equal both-ways force, 1/4" port, and FA/LB mounting. You only need to update the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
Because it is a double-rod cylinder, the force is equal both ways at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. It operates at speeds of 30-800 mm/s, features a 1/4" port, and uses adjustable 21mm air cushions at each end.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD50X50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD50X50S replacement — usually within 7-8 hours.