This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ50X125-50SH — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ50X125-50SH in place of this model. 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 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 drop-in 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
About the Airtac SUJ Adjustable Cylinder SUJ50X125-50SH
The AirTAC SUJ50X125-50SH is a double-acting single-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. The 50 mm bore delivers 982 N push and 825 N pull at 0.5 MPa, scaling to 1767 N push at 0.9 MPa. 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 exact drop-in 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. For sizing, the 982 N @0.5 MPa push yields a safe working load of roughly 589 N (60% factor), translating to a 50 kg vertical lift with a 2:1 margin. 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 — a true drop-in on output. 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 drop-in SAUJ50X125-50SH, keeping the 50 mm bore, 125 mm nominal stroke, 50 mm adjust window, and 1/4" port. If resizing, the neighbouring 40 mm bore provides 628 N push @0.5 MPa, while the 63 mm bore offers 1559 N push @0.5 MPa. 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 exact drop-in 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 bore provides 982 N push / 825 N pull @0.5 MPa, 1374 N push @0.7 MPa, and 1767 N push @0.9 MPa. 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
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