This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD50X25, 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 SUD50X25
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X25 is a double-acting profile-type standard cylinder with a Ø50mm bore and 25mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD50X25, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X25
- 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 SUD50X25
The AirTAC SUD50X25 is a double-acting, double-rod profile cylinder featuring a 50mm bore and 25mm stroke. Because a piston rod exits both ends, the effective working area is identical in both directions, yielding equal push and pull force of 825N at 0.5MPa, 1154N at 0.7MPa, and 1484N at 0.9MPa. The extruded aluminium profile barrel is more compact than standard cylinders, and the 1/4" port drives speeds of 30-800mm/s. This SUD50X25 model is discontinued; the direct replacement is the SAUD50X25, matching the bore, stroke, 1/4" port, and FA/LB mounting.
This non-magnetic SKU cannot accept a sensing switch, but upgrading to the SAUD50X25 allows modern CMSG/DMSG/EMSG sensors to replace the legacy CS1-B/DS1-B switches. The dual-rod design prevents rotation and can drive two tools simultaneously. Note that air cushions only decelerate the piston; an external rod lock is required to hold loads without live air.
Airtac SUD Series Double Rod Cylinder SUD50X25 Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X25 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X25 |
| Bore size | Ø50 mm |
| Stroke | 25 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 SAUD50X25 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 SAUD50X25 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 SUD50X25
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×25 | 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 SUD50X25 Is Used
Dual-Tool Transfer
Simultaneously drives two opposing grippers to pick and place parts from both sides of a workstation without requiring a second actuator.
Anti-Rotation Lift
Lifts guided vertical platens where a single rod might twist under offset loads, keeping the payload perfectly stable throughout the 25mm travel.
Symmetric Pusher
Synchronizes pushing and pulling actions on a conveyor line, using the equal both-ways force to shuttle items back and forth accurately.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X25 with the SAUD50X25
To replace the discontinued SUD50X25, use the SAUD50X25 direct, which retains the 50mm bore, 25mm stroke, 1/4" port, and FA/LB mounting. When sizing both ways, verify force at neighbouring bores: the 40mm yields 528/739/950N and the 63mm yields 1402/1962/2523N (@0.5/@0.7/@0.9MPa). Choose a double-rod cylinder when you need anti-rotation, a back rod to carry a sensor cam, or to drive two tools. This non-magnetic SKU takes no switch; the SAUD upgrade uses CMSG/DMSG/EMSG sensors instead of CS1-B/DS1-B. For strokes >=300mm, calculate side-load carefully to prevent guide wear. Cushions only decelerate; use an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X25
- ✓ 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 SUD50X25 FAQ
Yes, the SUD50X25 is discontinued. The direct replacement is the SAUD50X25, which matches the 50mm bore, 25mm stroke, 1/4" port, and FA/LB mounting.
Because it is a double-rod cylinder, force is equal both ways: 825N @0.5MPa, 1154N @0.7MPa, and 1484N @0.9MPa. The fixed port size for the 50mm bore is 1/4".
Request a Quote for the SAUD50X25
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD50X25 replacement — usually within 7-8 hours.