This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X225-20, 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 SUJ40X225-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X225-20 is a double-acting profile-type standard cylinder with a Ø40mm bore and 225mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X225-20, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke225 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X225-20
- 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 SUJ40X225-20
The AirTAC SUJ40X225-20 is a discontinued double-acting double-rod profile cylinder with a 225 mm nominal stroke and a 20 mm external stop screw window, allowing you to trim the extend stroke down to 205 mm on-site. The direct replacement is the SAUJ40X225-20, matching the bore, force, and SC-series FA/LB mounting.
The stop screw sets the extend end position but is not a load lock; the cylinder drifts on air loss and the 21 mm adjustable cushions only decelerate near stroke end. The SAUJ upgrade retains this compact profile body but switches sensing to current CMSG/DMSG/EMSG switches, whereas this legacy model used CS1-B/DS1-B. This non-magnet SKU cannot take a switch.
Airtac SUJ Adjustable Cylinder SUJ40X225-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X225-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X225-20 |
| Bore size | Ø40 mm |
| Stroke | 225 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 SAUJ40X225-20 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 SAUJ40X225-20 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 SUJ40X225-20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×225 | 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 SUJ40X225-20 Is Used
Variable Pitch Indexing
Dialing in the 205-225 mm extend stop on-site to match slightly different product lengths without swapping the entire cylinder body.
Crash-Sensitive Forming
Trimming the extend stroke by up to 20 mm to fine-tune contact pressure against delicate workpieces in a light assembly press.
Adjustable Diverters
Setting the exact extend position on the fly to accommodate varying package widths on a 40 mm bore profile cylinder diverter.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X225-20 with the SAUJ40X225-20
To replace this discontinued SUJ40X225-20, specify the SAUJ40X225-20 direct: it keeps the 40 mm bore, 225 mm stroke, 20 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 20 mm adjust window if you need precise 205-225 mm extend tuning on-site; a fixed SAU plus external stop lacks this integrated trim. Because this SKU lacks a magnet, it cannot take a switch; the SAUJ -S variant uses CMSG/DMSG/EMSG sensors (this SUJ used CS1-B/DS1-B). At 225 mm stroke, verify side-load alignment to prevent rod binding. The stop screw sets end position only—it is not a lock; use an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X225-20
- ✓ 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 SUJ40X225-20 FAQ
Yes, the SUJ40X225-20 is discontinued. The direct replacement is the SAUJ40X225-20, matching the 40 mm bore, 225 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.
The 20 mm external stop screw window allows trimming the 225 mm extend stroke down to 205 mm on-site. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X225-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X225-20 replacement — usually within 7-8 hours.