This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X175-20, 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 SUJ50X175-20
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X175-20 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 SAUJ50X175-20, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke175 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X175-20
- 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 SUJ50X175-20
The AirTAC SUJ50X175-20 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 stroke. The nominal 175 mm is the maximum. It features a 1/4" port, an M16x1.5 rod thread, and 21 mm adjustable cushions.
This SUJ model is discontinued and the direct replacement is the SAUJ50X175-20, matching the bore, stroke, force, and SC-series FA/LB mounting. The upgrade path moves sensing from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors. Note this non-magnetic SKU cannot take a switch, and the stop screw sets end position but is not a load lock.
Airtac SUJ Adjustable Cylinder SUJ50X175-20 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X175-20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X175-20 |
| 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 SAUJ50X175-20 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 SAUJ50X175-20 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 SUJ50X175-20
| 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 SUJ50X175-20 Is Used
Custom Fixture Clamping
Trimming the extend stroke by up to 20 mm on-site allows operators to dial in the exact clamping position for varying part widths without machining custom spacers.
Variable-Length Sorting Diverter
A 155-175 mm extend window provides the flexibility to reposition a diverting gate on a packaging line to accommodate different box sizes on the fly.
Adjustable Height Stopper
Field-tuning the extend stroke lets a pneumatic stopper pin catch products of varying heights accurately before they enter a secondary processing station.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X175-20 with the SAUJ50X175-20
To replace the discontinued SUJ50X175-20, order the direct replacement SAUJ50X175-20. Both share the 50 mm bore, 175 mm max stroke, 20 mm adjust window, 1/4" port, and FA/LB mounts. Choose the 20 mm adjust window if you need precise field tuning of the extend end position. Because this SKU lacks a magnet, it cannot take a switch; the SAUJ upgrade uses CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B. For strokes of 300 mm or longer, verify side-load limits to prevent rod binding. The stop screw is not a lock—add an external rod lock for held loads.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X175-20
- ✓ 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 SUJ50X175-20 FAQ
Yes, the SUJ50X175-20 is discontinued. The direct replacement is the SAUJ50X175-20, which matches the 50 mm bore, 175 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 external stop screw trims the extend stroke by up to 20 mm on-site, giving a usable 155-175 mm stroke. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X175-20
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X175-20 replacement — usually within 7-8 hours.