This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUJ50X125-100 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUJ50X125-100 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 SUJ50X125-100
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X125-100 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 SAUJ50X125-100, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-100
About the Airtac SUJ Adjustable Cylinder SUJ50X125-100
The AirTAC SUJ50X125-100 is a double-acting single-rod profile cylinder with a 125 mm nominal stroke and a 100 mm adjustable stroke window, allowing you to trim the extend stroke on-site down to a 25 mm effective length. The extruded aluminum profile barrel is more compact than a standard cylinder of the same bore. This bore delivers 982 N push and 825 N pull at 0.5 MPa, rising to 1374 N push at 0.7 MPa, with a 1/4" port and M16x1.5 rod thread.
This SUJ model is discontinued; the exact drop-in replacement is the SAUJ50X125-100, matching the bore, stroke, force, port, and FA/LB mounting. The SAUJ upgrade shifts to current CMSG/DMSG/EMSG sensors from the legacy CS1-B/DS1-B, and because this specific SKU lacks a magnet, it cannot take a magnetic switch. For sizing, the 982 N push at 0.5 MPa yields a safe working load of roughly 589 N (60%), translating to a vertical lift capacity of about 50 kg with a 2:1 margin.
Airtac SUJ Adjustable Cylinder SUJ50X125-100 Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-100 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-100 |
| 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 SAUJ50X125-100 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 SAUJ50X125-100 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 SUJ50X125-100
| 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 SUJ50X125-100 Is Used
Variable Depth Boring
Dial in the extend stroke from 125 mm down to 25 mm on-site to machine blind holes of varying depths without swapping the entire actuator.
Adjustable Transfer Pusher
Tune the pusher end position on the line to handle different product lengths on the fly, using the 100 mm trim window to match carton sizes.
Variable Height Indexing
Set precise mechanical end stops for lifting platforms that must index parts to multiple intermediate heights within the 100 mm adjustment range.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-100 with the SAUJ50X125-100
To replace the discontinued SUJ50X125-100, order the drop-in SAUJ50X125-100, which preserves the 50 mm bore, 125 mm nominal stroke, 1/4" port, and FA/LB mounting. If resizing, neighboring bores offer different forces at 0.5 MPa: the 40 mm gives 628 N push, while the 63 mm provides 1559 N push. Choose the 100 mm adjust window when you need to dial the extend stroke down anywhere from 125 mm to a short 25 mm on-site; for smaller trim needs, a 20 mm or 50 mm window reduces screw overhang. Since this SKU has no magnet, it cannot accept sensors, but if switching to an -S SAUJ, you must use CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. The external stop screw sets the end position but is not a lock; for load holding on air loss, add an external rod lock or pilot-operated check valve. For strokes of 300 mm or longer, verify side-load limits to prevent rod binding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-100
- ✓ 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 SUJ50X125-100 FAQ
Yes, the AirTAC SUJ50X125-100 is discontinued. The exact drop-in replacement is the SAUJ50X125-100. It matches the 50 mm bore, 125 mm nominal stroke, 1/4" port, and FA/LB mounting. The SAUJ family uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B and offers the SAUF built-in-valve variant.
The 50 mm bore provides 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and 1767 N push at 0.9 MPa, with a theoretical max of 200 kgf at 1.0 MPa. The external stop screw provides a 100 mm adjustment window, allowing you to trim the extend stroke from the 125 mm maximum down to 25 mm. The stop sets end position and is not a load lock.
Related AirTAC SAU Cylinders
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