This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X175-20SFA, 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 SUJ50X175-20SFA
The AirTAC SUJ Adjustable Cylinder SUJ50X175-20SFA is a double-acting profile-type standard cylinder with a Ø50mm bore and 175mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X175-20SFA, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke175 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X175-20SFA
- 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 SUJ50X175-20SFA
The AirTAC SUJ50X175-20SFA is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 20 mm on-site, yielding a usable 155-175 mm extension out of the 175 mm nominal maximum. It features a 1/4" port, an M16x1.5 rod thread, and 21 mm adjustable air cushions at each end. This unit is DISCONTINUED; the direct replacement is the SAUJ50X175-20SFA, which preserves the bore, stroke, force, port, and FA mount interface.
The stop screw sets the end position but is not a load lock; a plain cylinder drifts on air loss, so use an external rod lock for held loads. Because this legacy -S model used CS1-B/DS1-B sensors, migrating to the SAUJ requires current CMSG/DMSG/EMSG switches. The compact extruded aluminum barrel is shorter than an ISO 15552 cylinder of the same bore, and the FA mount is an SC-series accessory.
Airtac SUJ Adjustable Cylinder SUJ50X175-20SFA Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X175-20SFA |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X175-20SFA |
| Bore size | Ø50 mm |
| Stroke | 175 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M16×1.5 |
| 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 SAUJ50X175-20SFA carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
The SAUJ50X175-20SFA 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 SUJ50X175-20SFA
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | 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 SUJ50X175-20SFA Is Used
Adjustable End-Stop Diverter
Trimming the extend stroke by up to 20 mm on-site allows a diverter gate to hit multiple product sizes without swapping the entire cylinder.
Variable-Length Transfer Pusher
A 155-175 mm extend window lets operators fine-tune a transfer pusher stroke on the line to accommodate varying carton depths.
Field-Tuned Pallet Stop
An external stop screw provides exact pallet positioning at 175 mm max extension, adjustable downward by 20 mm for different pallet heights.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X175-20SFA with the SAUJ50X175-20SFA
To replace the discontinued SUJ50X175-20SFA, order the direct replacement SAUJ50X175-20SFA, keeping the 50 mm bore, 175 mm stroke, 20 mm adjust window, and FA mount. The 20 mm adjust window is ideal if your end position needs field tuning between 155 and 175 mm. Remember that the -S magnet mandates a sensor change: the legacy CS1-B/DS1-B switches are replaced by CMSG/DMSG/EMSG sensors on the SAUJ. For strokes of 300 mm or longer, verify your side-load limits to prevent excessive guide wear. The stop screw only sets end position and does not lock the load; for vertical or held loads, add an external rod lock or pilot-operated check valve.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X175-20SFA
- ✓ 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 SUJ50X175-20SFA FAQ
Yes, the SUJ50X175-20SFA is discontinued. The direct replacement is the SAUJ50X175-20SFA, which matches the 50 mm bore, 175 mm stroke, 20 mm adjust window, 1/4" port, and FA mounting. You must upgrade the legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches.
The external stop screw allows you to trim the extend stroke by up to 20 mm on-site, giving a usable extension range of 155-175 mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X175-20SFA
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X175-20SFA replacement — usually within 7-8 hours.