This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X50-30, 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 SUJ40X50-30
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X50-30 is a double-acting profile-type standard cylinder with a Ø40mm bore and 50mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X50-30, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X50-30
- 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 SUJ40X50-30
The AirTAC SUJ40X50-30 is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 30 mm on-site, yielding a usable 20-50 mm stroke from the 50 mm nominal maximum. 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 SAUJ40X50-30, matching the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrades to current CMSG/DMSG/EMSG sensors (this SKU has no magnet and cannot take a switch) and offers the SAUF built-in-valve variant. Note: the stop screw sets end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X50-30 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X50-30 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X50-30 |
| Bore size | Ø40 mm |
| Stroke | 50 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 SAUJ40X50-30 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 SAUJ40X50-30 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 SUJ40X50-30
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 SUJ40X50-30 Is Used
Variable Pitch Forming
Bending or pressing operations where the material thickness varies, requiring on-site extend stroke trimming via the stop screw to prevent over-travel.
Adjustable Diverter Gate
Sorting different package sizes on a line by tuning the pusher stroke from 20 to 50 mm on-site to accommodate varying box footprints.
Variable Depth Pusher
Loading parts into containers of different depths, using the external stop to set the exact extend position without reprogramming controls.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X50-30 with the SAUJ40X50-30
To replace the discontinued SUJ40X50-30, order the direct replacement SAUJ40X50-30, which preserves the 40 mm bore, 50 mm nominal stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 30 mm adjust window when you need field tuning of the extend stroke from 20 to 50 mm without swapping cylinders. Because this specific SKU lacks a magnet (-S), it cannot support legacy CS1-B/DS1-B or modern CMSG/DMSG/EMSG sensors; if sensing is required, select an SAUJ-S model. For strokes of 300 mm or longer, verify side-load limits to prevent excessive rod wear.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X50-30
- ✓ 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 SUJ40X50-30 FAQ
Yes, the SUJ40X50-30 is discontinued. The direct replacement is the SAUJ40X50-30, which matches the 40 mm bore, 50 mm stroke, 30 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ uses current CMSG/DMSG/EMSG sensors and offers the SAUF built-in-valve variant.
The external stop screw provides a 30 mm adjust window, allowing you to shorten the 50 mm nominal extend stroke down to 20 mm on-site. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X50-30
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X50-30 replacement — usually within 7-8 hours.