This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X20S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X20S 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 SUD40X20S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X20S is a double-acting profile-type standard cylinder with a Ø40mm bore and 20mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X20S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X20S
About the Airtac SUD Series Double Rod Cylinder SUD40X20S
The AirTAC SUD40X20S is a double-acting, double-rod profile cylinder featuring a 40mm bore and 20mm stroke. Because a rod exits both ends on one piston, push and pull force are equal both ways at 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. This SUD model is discontinued and the exact drop-in replacement is the SAUD40X20S, retaining the 1/4" port, M12x1.25 rod thread, and FA/LB mounting. The back rod carries a sensor cam for stable legacy CS1-B/DS1-B switch detection.
With a 16mm rod and 21mm adjustable cushions at each end, this compact extruded aluminium barrel is shorter than an ISO 15552 cylinder of the same bore. For this -S magnet model, the SAUD upgrade transitions to current CMSG/DMSG/EMSG sensors. Based on the 528N @0.5MPa rating, the safe working load is approximately 317N, yielding a vertical lift capacity of about 27kg with a 2:1 margin. Remember that a plain cylinder does not hold loads 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 SUD40X20S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X20S |
| Bore size | Ø40 mm |
| Stroke | 20 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 SAUD40X20S 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 SAUD40X20S 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 SUD40X20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 SUD40X20S Is Used
Dual-Tool Pick & Place
Drives two opposing grippers simultaneously from one compact 40mm bore body, utilising the equal both ways force for balanced automated handling.
Anti-Rotation Transfer
The dual-rod geometry prevents mechanical twist during horizontal part ejection on conveyor lines, maintaining precise alignment without external guides.
Compact Vertical Lift
Lifts light 27kg fixtures vertically in tight warehouse machinery spaces, benefiting from the shorter profile barrel and stable 317N safe working load.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X20S with the SAUD40X20S
To replace the discontinued SUD40X20S, select the drop-in SAUD40X20S which matches the 40mm bore, 20mm stroke, 1/4" port, and equal-both-ways force. When sizing both ways, verify your force requirements against the 528N @0.5MPa limit, or step up to the 50mm bore neighbour if more thrust is needed. A double rod is right when you need anti-rotation stability or need to drive two tools simultaneously. Mounting is limited to Basic, FA, and LB (SC-series compatible only). For the -S magnet option, plan a sensor change from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG. For this 20mm stroke, side-load alignment is straightforward, but for any stroke >=300mm, ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X20S
- ✓ 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 SUD40X20S FAQ
Yes, the SUD40X20S is discontinued. The exact drop-in replacement is the SAUD40X20S, which shares the same 40mm bore, 20mm stroke, 1/4" port, and FA/LB mounting. The primary upgrade is moving from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG sensors.
Because it is a double-rod cylinder, force is equal both ways: 528N @0.5MPa, 739N @0.7MPa, and 950N @0.9MPa. Operating speed ranges from 30-800mm/s. It does not hold loads on air loss; the 21mm air cushions only decelerate near stroke end.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X20S
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