This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X300S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X300S 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 SUD40X300S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X300S is a double-acting profile-type standard cylinder with a Ø40mm bore and 300mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X300S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke300 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X300S
About the Airtac SUD Series Double Rod Cylinder SUD40X300S
The AirTAC SUD40X300S is a discontinued double-acting, double-rod profile cylinder featuring a 40mm bore and 300mm stroke. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal at 528N @0.5 MPa, 739N @0.7 MPa, and 950N @0.9 MPa. The exact drop-in replacement is the SAUD40X300S, which matches the 1/4" port, M12x1.25 rod thread, and 21mm cushions. The SAU upgrade uses current CMSG/DMSG/EMSG sensors instead of this model's legacy CS1-B/DS1-B switches, and offers an SAUF built-in-valve variant.
Because the second rod acts as an anti-rotation guide and can carry a sensor cam, it drives two tools simultaneously. The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore. Based on the 528N @0.5 MPa force, the safe working load is approximately 317N, and the vertical lift capacity is about 27kg with a 2:1 margin. Note that a plain cylinder does not hold its load on air loss; the air cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac SUD Series Double Rod Cylinder SUD40X300S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X300S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X300S |
| Bore size | Ø40 mm |
| Stroke | 300 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 SAUD40X300S 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 SAUD40X300S 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 SUD40X300S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 SUD40X300S Is Used
Dual-Tool Machining Station
Drives two opposing machining heads simultaneously with equal push and pull force, using the double-rod geometry to maintain strict axial synchronization.
Anti-Rotation Transfer Gate
Uses the inherent anti-rotation property of the twin rods to pivot a transfer gate on a packaging line without needing external linear guides.
Symmetric Push-Pull Divertor
Employs the back rod to carry a sensor cam while pushing and pulling a diverting flap on a conveyor, ensuring equal force during bidirectional sorting.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X300S with the SAUD40X300S
To replace the SUD40X300S, order the SAUD40X300S drop-in (insert an A after the leading S). Size both ways by checking neighbor bores while confirming the force remains equal in both directions. Choose a double rod when you need anti-rotation stability or must drive two tools from one cylinder. Mounting is Basic, FA, or LB only (AirTAC SC series compatible). For the -S magnet, change legacy CS1-B/DS1-B switches to CMSG/DMSG/EMSG sensors. At 300mm stroke, add external guides to prevent rod bending and manage side loads.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X300S
- ✓ 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 SUD40X300S FAQ
Yes, the SUD40X300S is discontinued. The exact drop-in replacement is the SAUD40X300S, which matches the 40mm bore, 300mm stroke, 1/4" port, and equal-both-ways force. You will need to upgrade the legacy CS1-B/DS1-B switches to current CMSG/DMSG/EMSG sensors.
The 1/4" port cylinder provides equal force both ways: 528N @0.5 MPa, 739N @0.7 MPa, and 950N @0.9 MPa. The safe working load is about 317N (60% of the 0.5 MPa figure), yielding a 27kg vertical lift capacity with a 2:1 margin.
Related AirTAC SAU Cylinders
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