This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X500-20S, 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 SUJ40X500-20S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X500-20S is a double-acting profile-type standard cylinder with a Ø40mm bore and 500mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X500-20S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke500 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X500-20S
- 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 SUJ40X500-20S
The AirTAC SUJ40X500-20S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 480-500 mm stroke out of the 500 mm nominal maximum. This discontinued unit is replaced direct by the SAUJ40X500-20S, matching the bore, force, adjust window, and FA/LB mounting.
The stop screw sets the end position but is not a load lock; drift occurs on air loss, so use an external rod lock for held loads. The -S magnet supports legacy CS1-B/DS1-B switches, whereas the SAUJ replacement upgrades to CMSG/DMSG/EMSG sensors. With a 500 mm stroke, external guides are recommended to prevent rod bending.
Airtac SUJ Adjustable Cylinder SUJ40X500-20S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X500-20S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X500-20S |
| Bore size | Ø40 mm |
| Stroke | 500 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 SAUJ40X500-20S 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 SAUJ40X500-20S 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 SUJ40X500-20S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 SUJ40X500-20S Is Used
Divertor Gate Calibration
Trimming the extend stroke by up to 20 mm on-site allows precise gate positioning on conveyor lines without machining custom spacers.
Variable Carton Sealing
Field-tuning the 480-500 mm extend stroke accommodates slight flap variations in carton sealing presses, ensuring consistent contact pressure.
Probe Contact Adjustment
Dialing in the exact extend end position avoids over-travel when lowering testing probes onto delicate printed circuit boards.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X500-20S with the SAUJ40X500-20S
To replace the discontinued SUJ40X500-20S, specify the exact direct replacement SAUJ40X500-20S, which preserves the 40 mm bore, 500 mm nominal stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 20 mm adjust window if you need on-site extend tuning between 480 and 500 mm rather than a fixed stop. For the -S magnet, note the sensor change from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG. Because the stroke is 500 mm, ensure external guides are used to mitigate side-load and rod-bending risks.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X500-20S
- ✓ 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 SUJ40X500-20S FAQ
Yes, the SUJ40X500-20S is discontinued. The direct replacement is the SAUJ40X500-20S, which matches the 40 mm bore, 500 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
The external stop screw allows you to trim the extend stroke by up to 20 mm on-site, giving a usable 480-500 mm stroke. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X500-20S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X500-20S replacement — usually within 7-8 hours.