This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X50S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X50S 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 SUD40X50S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X50S is a double-acting profile-type standard cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X50S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X50S
About the Airtac SUD Series Double Rod Cylinder SUD40X50S
The AirTAC SUD40X50S is a double-acting, double-rod profile cylinder where a rod exits both ends, yielding equal push and pull force of 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa. This model is discontinued and the exact drop-in replacement is the SAUD40X50S, retaining the 40mm bore, 50mm stroke, 1/4" port, and FA/LB mounting. 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, this design offers excellent anti-rotation stability. The S40 bore uses a 16mm rod, M12x1.25 thread, and 21mm adjustable cushions. With a safe working load of roughly 317N (60% of the 0.5MPa force), it achieves a 27kg vertical lift with a 2:1 margin. Note that a plain cylinder drifts on air loss; the cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac SUD Series Double Rod Cylinder SUD40X50S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X50S |
| Bore size | Ø40 mm |
| Stroke | 50 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 SAUD40X50S carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAUD40X50S 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 SUD40X50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | 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 SUD40X50S Is Used
Dual-Tool Machining Fixture
Drives two opposing machining heads simultaneously from one piston, utilising the equal both-ways force to maintain perfectly balanced cutting pressure.
Anti-Rotation Transfer Unit
Transfers parts along a conveyor using the twin-rod geometry to prevent rotational drift, ensuring components remain perfectly aligned during transit.
Symmetric Push-Pull Sorter
Executes bidirectional sorting gates where the 528N force at 0.5MPa is required equally in both directions to divert packages of varying weights.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X50S with the SAUD40X50S
To replace the discontinued SUD40X50S, order the drop-in SAUD40X50S, which matches the 40mm bore, 50mm stroke, 1/4" port, and FA/LB mounting. Because force is equal both ways, size it by checking neighbouring bores against your exact push and pull requirements. A double rod is the right choice when you need anti-rotation stability or want to drive two tools from one piston. If your stroke is 300mm or longer, verify the side-load limits to prevent guide wear. The -S suffix on this legacy model indicates a piston magnet for CS1-B/DS1-B switches; when migrating to the SAUD, upgrade to current CMSG/DMSG/EMSG sensors for accurate positioning.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X50S
- ✓ 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 SUD40X50S FAQ
Yes, the SUD40X50S is discontinued. The exact drop-in replacement is the SAUD40X50S, which matches the 40mm bore, 50mm stroke, 1/4" port, and FA/LB mounting. The SAUD uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The SUD40X50S provides equal force both ways: 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa. The air port is 1/4", the rod is 16mm with an M12x1.25 thread, and it features 21mm adjustable cushions at each end.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X50S
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