This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD50X280S, 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 SUD50X280S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X280S is a double-acting profile-type standard cylinder with a Ø50mm bore and 280mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD50X280S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke280 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X280S
- 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 SUD50X280S
The AirTAC SUD50X280S is a double-acting, double-rod profile cylinder featuring a 50mm bore, 280mm stroke, and a 1/4 inch port. A rod exits both ends on a single piston, meaning both faces use the rod-side area and push/pull force is equal both ways (825N at 0.5MPa). This model is discontinued and the direct replacement is the SAUD50X280S, which retains the same body, bore, stroke, force, port, and FA/LB mounting. The SAUD upgrades to current CMSG/DMSG/EMSG sensors, whereas this legacy SUD used CS1-B/DS1-B switches. The extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same bore.
Because the rear rod can carry a sensor cam or drive a second tool simultaneously while resisting rotation, the double-rod design offers distinct mechanical advantages. Note that a plain cylinder does not hold loads on air loss; the adjustable 21mm cushions only decelerate near stroke end, so an external rod lock is required for held loads.
Airtac SUD Series Double Rod Cylinder SUD50X280S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X280S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X280S |
| Bore size | Ø50 mm |
| Stroke | 280 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 SAUD50X280S 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 SAUD50X280S 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 SUD50X280S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×280 | 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 SUD50X280S Is Used
Dual-Tool Machining Station
Drives two opposing tools simultaneously from one piston, utilizing the equal both ways force to ensure perfectly balanced machining pressure on both sides.
Anti-Rotation Transfer Arm
Transfers parts across a conveyor without rotational drift, using the double-rod geometry to maintain precise angular alignment during rapid 30-800 mm/s movements.
Symmetric Clamping Fixture
Clamps workpieces from both ends evenly. The rear rod acts as a mechanical cam to trigger legacy CS1-B/DS1-B position sensors, ensuring the clamp is closed before operations begin.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X280S with the SAUD50X280S
To replace the discontinued SUD50X280S, specify the SAUD50X280S direct equivalent, which maintains the identical 50mm bore, 280mm stroke, 1/4 inch port, M16x1.5 rod thread, and FA/LB mounting compatibility with the AirTAC SC series. When sizing both ways, verify the equal both ways force fits your requirements: 825N at 0.5MPa, 1154N at 0.7MPa, or 1484N at 0.9MPa, or step up to the 63mm bore for higher demands. A double rod is the right choice when you need anti-rotation stability, a rear rod to mount a sensor cam, or to drive two tools. Because this unit has the -S magnet, plan to upgrade your legacy CS1-B/DS1-B switches to CMSG/DMSG/EMSG sensors. For this 280mm stroke, ensure the side-load line is respected to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X280S
- ✓ 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 SUD50X280S FAQ
Yes, the SUD50X280S is discontinued. The direct replacement is the SAUD50X280S, which matches the 50mm bore, 280mm stroke, 1/4 inch port, and FA/LB mounting. You must upgrade the position sensors from the legacy CS1-B/DS1-B to the current CMSG/DMSG/EMSG series.
The 1/4 inch ported, 50mm bore double-rod design provides equal force both ways: 825N at 0.5MPa, 1154N at 0.7MPa, and 1484N at 0.9MPa.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD50X280S
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