This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ40X175-50, 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 SUJ40X175-50
The AirTAC Airtac SUJ Adjustable Cylinder SUJ40X175-50 is a double-acting profile-type standard cylinder with a Ø40mm bore and 175mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ40X175-50, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke175 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUJ40X175-50
- 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 SUJ40X175-50
The AirTAC SUJ40X175-50 is a double-acting double-rod profile cylinder with a 175 mm nominal stroke and a 1/4 inch port. An external stop screw lets you trim the extend stroke by up to 50 mm on-site, giving a usable range of 125 to 175 mm to dial in exact end positions without machining spacers. This discontinued model is replaced by the SAUJ40X175-50.
The SAUJ40X175-50 is a direct replacement, matching the bore, stroke, 50 mm adjust window, force, and FA/LB mounting. The upgrade path moves from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches, though this specific non-magnet SKU cannot accept a switch. The stop screw sets end position but is not a load lock; add an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ40X175-50 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ40X175-50 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ40X175-50 |
| Bore size | Ø40 mm |
| Stroke | 175 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 SAUJ40X175-50 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 SAUJ40X175-50 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 SUJ40X175-50
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 SUJ40X175-50 Is Used
Variable Length Cutoff
Trimming the extend stroke by up to 50 mm on-site lets a packaging line dial in exact material cutoff lengths between 125 and 175 mm without swapping cylinders.
Adjustable Forming Press
Dialing in the 125 to 175 mm extend window on-site provides precise bottoming depth for light assembly presses without machining custom mechanical spacers.
Variable Stroke Divert
A diverting gate on a conveyor can be adjusted across a 50 mm window to handle varying product widths on the fly using the external stop screw.
Replacing the Airtac SUJ Adjustable Cylinder SUJ40X175-50 with the SAUJ40X175-50
To replace the discontinued SUJ40X175-50, order the SAUJ40X175-50 direct. It retains the 40 mm bore, 175 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window when you need wide on-site tuning between 125 and 175 mm. Because this SKU lacks a magnet, it cannot take a sensor; if position feedback is needed, select an SAUJ with the -S suffix and use CMSG/DMSG/EMSG switches. For this 175 mm stroke, verify side-load limits. The stop screw sets end position only; use an external rod lock for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ40X175-50
- ✓ 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 SUJ40X175-50 FAQ
Yes, the SUJ40X175-50 is discontinued. The direct replacement is the SAUJ40X175-50, which matches the 40 mm bore, 175 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. The SAUJ family upgrades the sensor system to CMSG/DMSG/EMSG, though this specific non-magnet SKU cannot accept a switch.
The external stop screw allows you to trim the extend stroke by up to 50 mm on-site, giving a usable range of 125 to 175 mm. The stop sets end position only and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ40X175-50
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ40X175-50 replacement — usually within 7-8 hours.