This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X500-50, 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 SUJ40X500-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X500-50 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 SAUJ40X500-50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke500 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X500-50
- 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 SUJ40X500-50
The AirTAC SUJ40X500-50 is a double-acting double-rod profile cylinder with a 40mm bore and 500mm nominal stroke. An external stop screw lets you trim the extend stroke by up to 50mm on-site, giving a usable 450-500mm window to dial in machine stops without machining. The extruded aluminum profile barrel is shorter than a standard cylinder of the same bore. This SUJ model is discontinued; the direct replacement is the SAUJ40X500-50, matching the 1/4" port, M12x1.25 rod thread, and 21mm adjustable cushions.
The stop screw sets end position but is not a load lock. Upgrading to the SAUJ retains the SC-series FA/LB mounting but moves sensing from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors. Note this non-magnetic SKU cannot take a switch.
Airtac SUJ Adjustable Cylinder SUJ40X500-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X500-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X500-50 |
| 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 SAUJ40X500-50 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 SAUJ40X500-50 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 SUJ40X500-50
| 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 SUJ40X500-50 Is Used
Adjustable End Stops
Dialing in the exact extend position on a machining fixture. The 50mm window lets operators trim the 500mm stroke on-site to hit a precise datum without re-machining hard stops.
Variable Length Diverter
Routing mixed carton sizes on a line. The external screw provides 450-500mm of extend adjustment to accommodate different package lengths without swapping the cylinder.
Tunable Pusher Stroke
Feeding parts into a varying-width hopper. The stop screw allows quick field tuning of the extend distance to prevent crushing parts of different widths.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X500-50 with the SAUJ40X500-50
To replace the discontinued SUJ40X500-50, order the direct replacement SAUJ40X500-50, which preserves the 40mm bore, 500mm stroke, 1/4" port, and FA/LB mounting. Choose the 50mm adjust window if you need up to 50mm of field stroke tuning; the stop screw sets end position but is not a load lock, so use an external rod lock for held loads. Because this is a non-magnetic SKU, it cannot take a switch; the SAUJ upgrade uses CMSG/DMSG/EMSG sensors instead of legacy CS1-B/DS1-B. At 500mm stroke, use external guides to prevent rod bending and side-load damage.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X500-50
- ✓ 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 SUJ40X500-50 FAQ
Yes, the SUJ40X500-50 is discontinued. The direct replacement is the SAUJ40X500-50, which matches the 40mm bore, 500mm stroke, 1/4" port, and FA/LB mounting. The SAUJ also supports the SAUF built-in-valve variant and uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The external stop screw trims the extend stroke by up to 50mm on-site (usable 450-500mm). The stop sets end position but is not a load lock; use an external rod lock for held loads. Speed is 30-800mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X500-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X500-50 replacement — usually within 7-8 hours.