This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD40X120, with the same bore, stroke, output force, port and mounting, so it fits the same application. 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 SUD40X120
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X120 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 direct replacement is the SAUD40X120, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke120 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X120
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SUD Series Double Rod Cylinder SUD40X120
The AirTAC SUD40X120 is a double-acting, double-rod profile cylinder featuring a 40mm bore and 120mm stroke. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal. This model is discontinued; the direct replacement is the SAUD40X120, retaining the same 1/4" port, M12x1.25 rod thread, and 21mm adjustable air cushions at each end.
Because the second rod acts as an anti-rotation guide and can drive two tools simultaneously, this compact extruded aluminium barrel offers superior stability over single-rod variants. Force is equal both ways at 528N @0.5 MPa, 739N @0.7 MPa, and 950N @0.9 MPa. Note this SKU lacks a magnet and cannot take a sensor.
Airtac SUD Series Double Rod Cylinder SUD40X120 Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X120 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X120 |
| 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 SAUD40X120 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 SAUD40X120 produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUD Series Double Rod Cylinder SUD40X120
| 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 SUD40X120 Is Used
Dual-Station Push Assembly
Drives two opposing workpieces simultaneously using both rod ends, ensuring perfectly synchronized pressing with equal 528N force at 0.5 MPa.
Anti-Rotation Transfer Gate
The twin-rod geometry prevents mechanical twisting during lateral part diversion on the line, maintaining precise alignment without external guides.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X120 with the SAUD40X120
To replace the discontinued SUD40X120, specify the SAUD40X120 direct: it matches the 40mm bore, 120mm stroke, 1/4" port, and Basic/FA/LB mounting. If sizing both ways, neighbouring bores (32mm and 50mm) offer different equal-both-ways forces, but the 40mm provides 528N at 0.5MPa. Choose a double-rod cylinder when you need anti-rotation stability or to drive two tools from one piston. For the SAUD upgrade, note the sensor change from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors (though this specific non-magnetic SKU cannot take a switch). For stroke lengths of 300mm or greater, carefully verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X120
- ✓ 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 SUD40X120 FAQ
Yes, the SUD40X120 is discontinued. The direct replacement is the SAUD40X120, which shares the same 40mm bore, 120mm stroke, 1/4" port, and Basic/FA/LB mounting.
Because it is a double-rod cylinder, force is equal both ways: 528N @0.5 MPa, 739N @0.7 MPa, and 950N @0.9 MPa. The fixed air port size for the 40mm bore is 1/4".
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X120
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD40X120 replacement — usually within 7-8 hours.