This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X120S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X120S 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 SUD40X120S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X120S is a double-acting profile-type standard cylinder with a Ø40mm bore and 120mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X120S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke120 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X120S
About the Airtac SUD Series Double Rod Cylinder SUD40X120S
The AirTAC SUD40X120S is a double-acting, double-rod profile cylinder featuring a 40mm bore, 120mm stroke, and a 1/4" port. A rod exits both ends on a single 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. This SUD model is discontinued and end-of-life; the exact drop-in replacement is the SAUD40X120S, which matches the bore, stroke, force, port, and FA/LB mounting. The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore.
Because the second rod acts as an anti-rotation guide and can carry a sensor cam, this design is ideal for driving two synchronized tools. With a 528N @0.5 MPa output, the computed safe working load is about 317N (60%), translating to a vertical lift capacity of roughly 27kg with a 2:1 margin. The -S suffix indicates a built-in piston magnet for legacy CS1-B/DS1-B switches; the SAUD replacement upgrades to current CMSG/DMSG/EMSG sensors. Note 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 SUD40X120S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X120S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X120S |
| Bore size | Ø40 mm |
| Stroke | 120 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 SAUD40X120S 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 SAUD40X120S 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 SUD40X120S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×120 | 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 SUD40X120S Is Used
Dual-Tool Drive Station
Drives two opposing tools simultaneously from a single piston, utilizing the equal both-ways force for perfectly balanced machining or forming operations.
Anti-Rotation Transfer
Transfers parts along a conveyor belt using the second rod as a fixed cam guide, preventing torsional twist during high-speed lateral movements.
Compact Vertical Lift
Lifts compact warehouse trays vertically with a safe working load of 317N, taking advantage of the short profile barrel to save floor space.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X120S with the SAUD40X120S
To replace the discontinued SUD40X120S, order the SAUD40X120S drop-in, keeping the 40mm bore, 120mm stroke, and 1/4" port identical. When sizing both ways, check the neighbouring 32mm and 50mm bores to ensure the equal both-ways force fits your requirement. Choose a double-rod cylinder when you need anti-rotation stability or must drive two tools from one body. Mounting is limited to Basic, FA, and LB (SC-series compatible only). For the -S magnet option, swap legacy CS1-B/DS1-B sensors for CMSG/DMSG/EMSG switches on the SAUD. For strokes of 300mm or longer, verify the side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X120S
- ✓ 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 SUD40X120S FAQ
Yes, the SUD40X120S is discontinued. The exact drop-in replacement is the SAUD40X120S, which matches the 40mm bore, 120mm stroke, 528N force, 1/4" port, and FA/LB mounting. The SAU replacement also offers the SAUF built-in-valve variant the SU line lacked.
Force is equal both ways: 528N @0.5 MPa, 739N @0.7 MPa, and 950N @0.9 MPa. Operating pressure is 0.15-1.0 MPa, proof is 1.5 MPa, and temperature is -20 to +70 C. The bore is 40mm, the port is 1/4", and speed is 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X120S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD40X120S replacement — usually within 7-8 hours.