This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD40X40S, 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 SUD40X40S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X40S is a double-acting profile-type standard cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD40X40S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X40S
- 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 SUD40X40S
The AirTAC SUD40X40S is a double-acting, double-rod profile cylinder featuring a 40mm bore, 40mm stroke, and a 1/4 inch air port. Because a rod exits both ends on a single piston, both faces use the rod-side area, meaning push and pull force are equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. This model is discontinued and the direct replacement is the SAUD40X40S, which matches the bore, stroke, force, port, and FA/LB mounting.
The double-rod design provides anti-rotation stability and allows the back rod to carry a sensor cam for legacy CS1-B/DS1-B switches (the SAUD replacement uses current CMSG/DMSG/EMSG sensors). Its extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore. Note that air cushions only decelerate near stroke end; an external rod lock is required for load holding.
Airtac SUD Series Double Rod Cylinder SUD40X40S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X40S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X40S |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAUD40X40S 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 SAUD40X40S 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 SUD40X40S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SUD40X40S Is Used
Dual-Tool Pick & Place
Drives two opposing grippers simultaneously using both rod ends, ensuring perfectly synchronized part transfer without adding a second cylinder.
Anti-Rotation Guiding
The twin-rod architecture prevents piston twist during extension, holding tight tolerances for pressing or indexing tasks that lack external linear guides.
Symmetrical Diverting
Mounts a cam on the rear rod to trigger legacy CS1-B/DS1-B sensors while the front rod pushes products cleanly across a conveyor lane.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X40S with the SAUD40X40S
To replace the discontinued SUD40X40S, use the direct replacement SAUD40X40S, which preserves the 40mm bore, 40mm stroke, equal-both-ways force, 1/4 inch port, and FA/LB mounting. When sizing both ways, verify that the 528 N @0.5 MPa equal force meets your requirement, or step to neighboring bores (32mm or 50mm) for different loads. A double rod is right when you need anti-rotation stability or want to drive two tools simultaneously. If your model has the -S magnet, plan a sensor change from legacy CS1-B/DS1-B to CMSG/DMSG/EMSG. For strokes >=300mm, confirm the side-load line to prevent guide wear. Remember, cushions only decelerate; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X40S
- ✓ 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 SUD40X40S FAQ
Yes, the SUD40X40S is discontinued. The direct replacement is the SAUD40X40S, which matches the 40mm bore, 40mm stroke, equal-both-ways force, 1/4 inch port, and FA/LB mounting. You only need to update the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The SUD40X40S provides equal force both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It uses a 1/4 inch air port (PT thread standard), features a 16mm rod, and has a 21mm adjustable cushion at each end.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUD40X40S replacement — usually within 7-8 hours.