This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X80-20S, 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 SUJ Adjustable Cylinder SUJ40X80-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X80-20S 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 SAUJ40X80-20S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X80-20S
- 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 SUJ Adjustable Cylinder SUJ40X80-20S
The AirTAC SUJ40X80-20S is a double-acting double-rod profile cylinder with an 80 mm nominal stroke and a 20 mm external stop screw, letting you trim the extend stroke down to 60 mm on-site. This model is DISCONTINUED; the direct replacement is the SAUJ40X80-20S, retaining the same force, 1/4" port, and FA/LB mounting.
The stop screw sets the end position but is not a load lock; use an external rod lock for held loads. The SAUJ upgrade switches legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches while keeping the compact profile body shorter than standard cylinders.
Airtac SUJ Adjustable Cylinder SUJ40X80-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X80-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X80-20S |
| 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 SAUJ40X80-20S 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 SAUJ40X80-20S produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SUJ Adjustable Cylinder SUJ40X80-20S
| 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 SUJ Adjustable Cylinder SUJ40X80-20S Is Used
Variable Pitch Pushing
Tuning the extend stroke by up to 20 mm on-site to push parts of varying widths into a machining station without reprogramming the PLC.
Adjustable Forming Stops
Setting precise end positions for light pressing tasks, allowing operators to dial in the exact 60-80 mm extend distance for different material thicknesses.
Dynamic Diverting
Actuating a diverter arm on a conveyor where the required reach changes based on product size, using the external stop to set the exact reach.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X80-20S with the SAUJ40X80-20S
To replace the discontinued SUJ40X80-20S, order the direct replacement SAUJ40X80-20S, which matches the 40 mm bore, 80 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 20 mm adjust window if you need field tuning between 60 and 80 mm; the stop screw sets end position and is not a lock. Because this has an -S magnet, swap legacy CS1-B/DS1-B switches for CMSG/DMSG/EMSG sensors. For strokes at or above 300 mm, verify side-load limits to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X80-20S
- ✓ 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 SUJ Adjustable Cylinder SUJ40X80-20S FAQ
Yes, the SUJ40X80-20S is discontinued. The direct replacement is the SAUJ40X80-20S, which shares the same 40 mm bore, 80 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. You will need to upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The 20 mm adjust window allows you to shorten the 80 mm nominal extend stroke down to 60 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X80-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X80-20S replacement — usually within 7-8 hours.