This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X125-50SH, 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 SUJ50X125-50SH
The AirTAC SUJ Adjustable Cylinder SUJ50X125-50SH is a double-acting profile-type standard cylinder with a Ø50mm bore and 125mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAUJ50X125-50SH, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-50SH
- 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 SUJ50X125-50SH
The AirTAC SUJ50X125-50SH is a double-acting double-rod profile cylinder with a 125 mm nominal stroke and a 50 mm external stop screw window, allowing you to trim the extend stroke on-site to a usable 75-125 mm. This unit features a built-in piston magnet for legacy CS1-B/DS1-B switches and uses a high-temperature Viton seal rated for 0-150 C. The 1/4" port and M16x1.5 rod thread match standard SC-series mounting accessories.
This SUJ model is discontinued and the direct replacement is the SAUJ50X125-50SH, sharing the same profile body, bore, stroke, force, and FA/LB mounts. The SAUJ upgrades sensing to current CMSG/DMSG/EMSG sensors and offers the SAUF built-in-valve variant the SU line lacked. The external stop sets the end position but is not a load lock; use an external rod lock for held loads.
Airtac SUJ Adjustable Cylinder SUJ50X125-50SH Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-50SH |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-50SH |
| Bore size | Ø50 mm |
| Stroke | 125 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 SAUJ50X125-50SH 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 SAUJ50X125-50SH 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 SUJ50X125-50SH
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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 SUJ50X125-50SH Is Used
Variable Length Dosing Heads
Trimming the extend stroke by up to 50 mm on-site allows precise volume calibration without machining new spacer blocks.
Adjustable Forming Stops
Set the exact 75-125 mm extend endpoint on the fly for parts of varying heights, avoiding the need for a fixed-stroke cylinder plus external stop.
Calibrated Pressing Heads
Dial in the final 50 mm of the extend stroke to tune contact pressure on delicate assemblies, using the 982 N @0.5 MPa force profile safely.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-50SH with the SAUJ50X125-50SH
To replace the discontinued SUJ50X125-50SH, order the direct replacement SAUJ50X125-50SH, keeping the 50 mm bore, 125 mm nominal stroke, 50 mm adjust window, and 1/4" port. Choose the 50 mm adjust window when you need to trim the extend stroke by up to 50 mm on-site, which beats installing a fixed-stroke SAU plus an external mechanical stop. Retain FA or LB mounting from the SC-series. Because this unit has the -S magnet, swap legacy CS1-B/DS1-B switches for current CMSG/DMSG/EMSG sensors on the SAUJ. The -H Viton seal handles 0-150 C environments. For strokes of 300 mm or longer, verify side-load guidance to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-50SH
- ✓ 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 SUJ50X125-50SH FAQ
Yes, the SUJ50X125-50SH is discontinued. The direct replacement is the SAUJ50X125-50SH, which matches the 50 mm bore, 125 mm stroke, 50 mm adjust window, 1/4" port, and FA/LB mounting. You must upgrade the -S magnet switches from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG sensors.
The 50 mm adjust screw shortens the extend stroke to a usable 75-125 mm. The stop sets end position but is not a load lock; on air loss the piston drifts and the 21 mm cushion only decelerates near stroke end. Use an external rod lock for held loads.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X125-50SH
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X125-50SH replacement — usually within 7-8 hours.