This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X40-40S, 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 SUJ40X40-40S
The AirTAC SUJ Adjustable Cylinder SUJ40X40-40S 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 SAUJ40X40-40S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X40-40S
- 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 SUJ40X40-40S
The AirTAC SUJ40X40-40S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 40mm on-site (usable extend range 0-40mm). The nominal 40mm stroke is the maximum. The stop screw sets the end position but is not a load lock.
This SUJ model is discontinued; the direct replacement is the SAUJ40X40-40S, sharing the same profile body, bore, force, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors, whereas this unit uses legacy CS1-B/DS1-B switches. A plain cylinder drifts on air loss, so use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X40-40S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X40-40S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X40-40S |
| 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 SAUJ40X40-40S 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 SAUJ40X40-40S 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 SUJ40X40-40S
| 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 SUJ Adjustable Cylinder SUJ40X40-40S Is Used
Variable Pitch Indexing
Adjusts the extend stroke on-site to tune the push distance for parts requiring different indexing pitches without swapping cylinders.
Variable Length Diverter
Trims the extend position to deflect varying carton widths on a conveyor line, ensuring accurate routing without repositioning hardware.
Crash-Protected Forming Stop
Sets a precise external mechanical end position for light forming tasks, allowing quick field adjustment of the stroke window as die depths change.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X40-40S with the SAUJ40X40-40S
To replace the discontinued SUJ40X40-40S, specify the direct replacement SAUJ40X40-40S, which matches the 40mm bore, 40mm stroke, 40mm adjust window, 1/4" port, and FA/LB mounting. Choose the 40mm adjust window if you need to trim the full extend stroke down to zero on-site. Because this is an -S model, swap the legacy CS1-B/DS1-B sensors for CMSG/DMSG/EMSG switches on the SAUJ. For strokes of 300mm or longer, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X40-40S
- ✓ 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 SUJ40X40-40S FAQ
Yes, the SUJ40X40-40S is discontinued. The direct replacement is the SAUJ40X40-40S, which maintains the same 40mm bore, 40mm stroke, 40mm adjust window, 1/4" port, and FA/LB mounting. You only need to upgrade the switches from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors.
The external stop screw provides a 40mm adjust window, allowing you to shorten the extend stroke from the 40mm nominal maximum down to 0mm on-site. The stop sets end position and does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X40-40S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X40-40S replacement — usually within 7-8 hours.