This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X185-50S, 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 SUJ50X185-50S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X185-50S is a double-acting profile-type standard cylinder with a Ø50mm bore and 185mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X185-50S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke185 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X185-50S
- 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 SUJ50X185-50S
The AirTAC SUJ50X185-50S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 50 mm on-site, yielding a usable extend range of 135-185 mm from the 185 mm nominal maximum.
This discontinued unit is fully replaced by the SAUJ50X185-50S, which retains the exact bore, stroke, force, and SC-series FA/LB mounting. The direct SAUJ upgrade transitions from legacy CS1-B/DS1-B sensors to current CMSG/DMSG/EMSG switches. The stop screw sets the end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X185-50S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X185-50S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X185-50S |
| Bore size | Ø50 mm |
| Stroke | 185 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 SAUJ50X185-50S 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 SAUJ50X185-50S 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 SUJ50X185-50S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×185 | 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 SUJ50X185-50S Is Used
Variable Pitch Indexing
Adjusts the extend stroke on-site for a 50 mm profile cylinder pushing parts into a variable-pitch fixture without swapping the entire actuator.
Reject Diverter Tuning
Trims the extend position to hit varying lane widths on a packaging line, using the 50 mm adjust window to dial in the exact reject arm reach.
Adjustable Stop Position
Sets a precise mechanical end-stop for carton alignment, allowing operators to shorten the stroke from 185 mm down to 135 mm as box formats change.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X185-50S with the SAUJ50X185-50S
To replace the discontinued SUJ50X185-50S, order the direct replacement SAUJ50X185-50S, keeping the 50 mm bore, 185 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. Choose the 50 mm adjust window when you need on-site extend trimming between 135 and 185 mm; the stop screw sets end position but is not a lock, so add an external rod lock for held loads. Because this unit has the -S magnet, swap the legacy CS1-B/DS1-B switches for CMSG/DMSG/EMSG sensors on the SAUJ. For this 185 mm stroke, verify side-load limits on the rod bearing.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X185-50S
- ✓ 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 SUJ50X185-50S FAQ
Yes, the SUJ50X185-50S is discontinued. The direct replacement is the SAUJ50X185-50S, matching the 50 mm bore, 185 mm stroke, 1/4" port, and FA/LB mounting. You must upgrade the -S magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw offers a 50 mm adjust window, allowing you to trim the 185 mm nominal extend stroke down to 135 mm on-site. The stop sets end position but does not lock the load.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X185-50S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X185-50S replacement — usually within 7-8 hours.