This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD50X250S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD50X250S in place of this model. 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 SUD50X250S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X250S is a double-acting profile-type standard cylinder with a Ø50mm bore and 250mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD50X250S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X250S
About the Airtac SUD Series Double Rod Cylinder SUD50X250S
The AirTAC SUD50X250S is a double-acting double-rod profile cylinder featuring a 50mm bore, 250mm stroke, and a 1/4 inch port. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same bore. This SUD model is discontinued and the exact drop-in replacement is the SAUD50X250S, sharing the same bore, stroke, force, port, and FA/LB mounting.
Because the second rod drives a sensor cam and resists rotation, a double-rod layout is ideal for precise multi-tool tasks. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches, whereas the SAUD replacement uses current CMSG/DMSG/EMSG sensors. For sizing, the 825 N @0.5 MPa force yields a safe working load of roughly 495 N and a vertical lift capacity of about 42 kg with a 2:1 margin. Note that the air cushion only decelerates near stroke end; an external rod lock is required to hold loads on air loss.
Airtac SUD Series Double Rod Cylinder SUD50X250S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X250S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X250S |
| Bore size | Ø50 mm |
| Stroke | 250 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 SAUD50X250S 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 SAUD50X250S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUD Series Double Rod Cylinder SUD50X250S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×250 | 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 SUD50X250S Is Used
Dual-Tool Machining Station
Drives two opposing tools simultaneously from one piston, utilising the equal both ways force for balanced material removal on both faces.
Anti-Rotation Transfer Gate
The double-rod construction prevents piston rotation during transit, ensuring precise alignment of transfer gates along the conveyor line.
Symmetric Push-Pull Divertor
Employs the back rod to carry a sensor cam while pushing and pulling loads with identical 825 N @0.5 MPa force in both directions.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X250S with the SAUD50X250S
To replace the discontinued SUD50X250S, order the drop-in SAUD50X250S, which matches the 50mm bore, 250mm stroke, 1/4 inch port, and FA/LB mounting. When sizing both ways, verify the equal push/pull force fits your load, or step to neighbouring bores (63mm or 40mm) to adjust the 825 N @0.5 MPa baseline. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one piston. For the -S sensor change, swap legacy CS1-B/DS1-B switches for current CMSG/DMSG/EMSG sensors on the SAUD. Because this stroke is 250mm (under the 300mm side-load threshold), standard FA/LB mounting is supported without extra guidance.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X250S
- ✓ 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 SUD50X250S FAQ
Yes, the SUD50X250S is discontinued. The exact drop-in replacement is the SAUD50X250S, which matches the 50mm bore, 250mm stroke, 1/4 inch port, and FA/LB mounting. You must upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG sensors for the SAUD.
The SUD50X250S has a 1/4 inch port and generates equal force both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This yields a safe working load of roughly 495 N and a vertical lift capacity of about 42 kg with a 2:1 margin.
Related AirTAC SAU Cylinders
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