This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X80-50, 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 SUJ40X80-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X80-50 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 SAUJ40X80-50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X80-50
- 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 SUJ40X80-50
The AirTAC SUJ40X80-50 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 50 mm on-site, yielding a usable 30-80 mm extend out of the 80 mm nominal maximum. This compact extruded-aluminum body is shorter than an ISO 15552 cylinder of the same bore.
This SUJ model is discontinued; the direct replacement is the SAUJ40X80-50, matching the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrade uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches. Note this non-magnet SKU cannot take a switch, and the stop screw sets end position but is not a load lock.
Airtac SUJ Adjustable Cylinder SUJ40X80-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X80-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X80-50 |
| 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 SAUJ40X80-50 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 SAUJ40X80-50 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 SUJ40X80-50
| 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 SUJ40X80-50 Is Used
Variable Pitch Pushing
Dialing in the exact part ejection distance on a conveyor by trimming the extend stroke up to 50 mm on-site without swapping cylinders.
Prototype Forming Stops
Adjusting the end position for test blanks in a press fixture, allowing rapid 30-80 mm extend tuning during product development.
Dynamic Package Sorting
Altering the stroke length on a diverting gate to handle varying carton depths on the fly without reprogramming machine logic.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X80-50 with the SAUJ40X80-50
To replace the discontinued SUJ40X80-50, order the direct replacement SAUJ40X80-50; body, 1/4" port, and FA/LB mounting are unchanged. Choose the 50 mm adjust window if you need to trim the 80 mm nominal extend down to a 30 mm minimum on-site; this avoids fabricating an external stop for a fixed SAU cylinder. Because this SKU lacks a magnet, it cannot accept a sensor; if position detection is needed, select an SAUJ-S variant and use CMSG/DMSG/EMSG sensors. For strokes of 300 mm or longer, verify side-load guidance to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X80-50
- ✓ 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 SUJ40X80-50 FAQ
Yes, the SUJ40X80-50 is discontinued. The direct replacement is the SAUJ40X80-50, which matches the 40 mm bore, 80 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ also supports the current CMSG/DMSG/EMSG sensors and the SAUF built-in-valve variant.
The external stop screw provides a 50 mm adjust window, allowing you to shorten the 80 mm nominal extend stroke down to 30 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X80-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X80-50 replacement — usually within 7-8 hours.