This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X25S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X25S 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 SUD40X25S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X25S is a double-acting profile-type standard cylinder with a Ø40mm bore and 25mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X25S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke25 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X25S
About the Airtac SUD Series Double Rod Cylinder SUD40X25S
The AirTAC SUD40X25S is a double-acting, double-rod profile cylinder featuring a 40mm bore and 25mm stroke. Because a rod exits both ends on one piston, push and pull force are equal at 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. This discontinued model uses a 1/4" port, a 16mm rod, and adjustable 21mm cushions. The exact drop-in replacement is the SAUD40X25S, matching the bore, stroke, force, and SC-series FA/LB mounting.
The dual-rod design prevents piston rotation and lets the back rod carry a sensor cam for legacy CS1-B/DS1-B switches (the SAUD uses current CMSG/DMSG/EMSG sensors). For buyers sizing components, the safe working load is roughly 317N (60% of the 0.5MPa force), allowing a vertical lift of about 27kg with a 2:1 margin. Note that air cushions only decelerate near stroke end; an external rod lock is required to hold loads on air loss.
Airtac SUD Series Double Rod Cylinder SUD40X25S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X25S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X25S |
| Bore size | Ø40 mm |
| Stroke | 25 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 SAUD40X25S 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 SAUD40X25S 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 SUD40X25S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | 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 SUD40X25S Is Used
Dual-Tool Driving
Simultaneously actuates two separate operations from one compact 40mm bore body, using both rod ends to push and pull with equal 528N force at 0.5MPa.
Anti-Rotation Transfer
Moves parts along a conveyor without piston twist, relying on the twin 16mm rods exiting both ends to maintain precise alignment during the 25mm stroke.
Compact Vertical Lift
Lifts approximately 27kg loads vertically with a 2:1 safety margin, where the shorter profile barrel saves space compared to standard cylinders.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X25S with the SAUD40X25S
To replace the discontinued SUD40X25S, order the drop-in SAUD40X25S, which preserves the 40mm bore, 25mm stroke, 1/4" port, and FA/LB mounting. When sizing both ways, verify your force needs across neighbouring bores, but this 40mm bore yields equal 528N push/pull force at 0.5MPa. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools simultaneously. If your model has the -S magnet, upgrade from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG sensors. For stroke lengths over 300mm, carefully manage side-load alignment to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X25S
- ✓ 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 SUD40X25S FAQ
Yes, the SUD40X25S is discontinued. The exact drop-in replacement is the SAUD40X25S. It matches the 40mm bore, 25mm stroke, 1/4" port, and FA/LB mounting, but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
Because it is a double-rod cylinder, force is equal both ways: 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. The 40mm bore dictates a 1/4" port, a 16mm piston rod, and M12x1.25 rod threads, operating at speeds of 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X25S
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