This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUD40X80S, 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 SUD40X80S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X80S is a double-acting profile-type standard cylinder with a Ø40mm bore and 80mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUD40X80S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X80S
- 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 SUD40X80S
The AirTAC SUD40X80S is a double-acting, double-rod profile cylinder featuring a 40mm bore, 80mm stroke, and a 1/4 inch air port. Because a rod exits both ends on one piston, both faces use the rod-side area, meaning push and pull force are equal at 528N @0.5 MPa, 739N @0.7 MPa, and 950N @0.9 MPa. This model is discontinued; the direct replacement is the SAUD40X80S, which retains the same bore, stroke, force, port, and FA/LB mounting. The SAUD upgrade uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches used here, and also offers the SAUF built-in-valve variant.
The dual-rod design prevents piston rotation and allows the back rod to drive a second tool or carry a sensor cam. The extruded aluminum profile barrel is shorter than an ISO 15552 cylinder of the same bore. Note that a plain cylinder does not hold loads 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 SUD40X80S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X80S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X80S |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAUD40X80S 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 SAUD40X80S 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 SUD40X80S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SUD40X80S Is Used
Dual-Tool Transfer
Simultaneously drives two opposing pickers from one compact 40mm bore body, using equal both-ways force to keep synchronized timing without adding a second cylinder.
Anti-Rotation Gripper
The twin rods prevent piston twist during jaw actuation, ensuring a rigid 80mm stroke for precision clamping where a single rod would wander under off-center loads.
Cam-Back Positioning
Uses the rear extending rod to physically trip an external limit or carry a sensor cam, providing a secondary mechanical confirmation at the back of the stroke.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X80S with the SAUD40X80S
To replace the discontinued SUD40X80S, specify the SAUD40X80S direct: insert an A after the leading S, keeping the 40mm bore, 80mm stroke, -S magnet, and 1/4 inch port identical. When sizing both ways, verify the equal force fits your application (528N @0.5 MPa, 739N @0.7 MPa, 950N @0.9 MPa) and check neighboring bores if you need more or less capacity. A double rod is right when you need anti-rotation, a back rod for a sensor cam, or to drive two tools. Mounting is Basic, FA, or LB only (AirTAC SC series compatible). For the -S sensor change, swap legacy CS1-B/DS1-B switches for current CMSG/DMSG/EMSG sensors on the SAUD. For strokes >=300mm, verify your side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X80S
- ✓ 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 SUD40X80S FAQ
Yes, the SUD40X80S is discontinued. The direct replacement is the SAUD40X80S, which matches the 40mm bore, 80mm stroke, 1/4 inch port, and FA/LB mounting. You must upgrade the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
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. Operating speed ranges from 30-800 mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAUD40X80S
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