This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAUJ50X125-100S, 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 SUJ50X125-100S
The AirTAC Airtac SUJ Adjustable Cylinder SUJ50X125-100S 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 SAUJ50X125-100S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUJ50X125-100S
- 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 SUJ50X125-100S
The AirTAC SUJ50X125-100S is a double-acting double-rod profile cylinder with an external stop screw that lets you trim the extend stroke by up to 100 mm on-site, yielding a usable 25-125 mm extension from the 125 mm nominal maximum. Featuring a 1/4" port, M16x1.5 rod thread, and 21 mm adjustable cushions, its extruded aluminum profile barrel is notably shorter than an ISO 15552 unit of the same bore.
This SUJ50X125-100S (with -S magnet for legacy CS1-B/DS1-B switches) is discontinued; the direct replacement is the SAUJ50X125-100S, which retains the bore, stroke, 1/4" port, and FA/LB mounting, but upgrades to current CMSG/DMSG/EMSG sensors. The adjust screw sets the end position but is not a load lock; drifting occurs on air loss without an external rod lock.
Airtac SUJ Adjustable Cylinder SUJ50X125-100S Technical Specifications
| Model | Airtac SUJ Adjustable Cylinder SUJ50X125-100S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUJ50X125-100S |
| 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 SAUJ50X125-100S 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 SAUJ50X125-100S 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 SUJ50X125-100S
| 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 SUJ50X125-100S Is Used
Variable Depth Boring
Dial in precise boring depths on-site using the 100 mm adjust window, allowing rapid tooling changes without swapping the entire cylinder.
Adjustable Diverter Stroke
Trim the extend stroke from 125 mm down to 25 mm to accommodate changing package sizes on a packaging line without repositioning mounts.
Variable Height Stops
Set exact mechanical end positions for pallet stops in a warehouse, using the external screw to tune the push distance on the fly.
Replacing the Airtac SUJ Adjustable Cylinder SUJ50X125-100S with the SAUJ50X125-100S
To replace the discontinued SUJ50X125-100S, specify the SAUJ50X125-100S direct: it matches the 50 mm bore, 125 mm stroke, 1/4" port, and FA/LB/Basic mounting. The 100 mm adjust window is ideal for dialing in precise end positions on-site, avoiding the need for a fixed SAU plus an external stop. If your stroke is 300 mm or longer, verify side-load limits to prevent rod binding. For the -S magnet, transition from legacy CS1-B/DS1-B switches to the SAUJ's CMSG/DMSG/EMSG sensors. Remember, the stop screw sets position but does not hold the load on air loss; use an external rod lock for vertical holding.
Replacement checklist
- ✓ Same bore / stroke → SAUJ50X125-100S
- ✓ 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 SUJ50X125-100S FAQ
Yes, the SUJ50X125-100S is discontinued. The direct replacement is the SAUJ50X125-100S, which matches the 50 mm bore, 125 mm stroke, 1/4" port, and FA/LB mounting. The SAUJ upgrades the -S magnet sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG switches.
The external stop screw allows you to trim the extend stroke by up to 100 mm on-site, giving a usable 25-125 mm extension. The stop sets end position but is not a load lock.
Related AirTAC SAU Cylinders
Request a Quote for the SAUJ50X125-100S
Send us the quantity and destination. We confirm price, stock and lead time on the SAUJ50X125-100S replacement — usually within 7-8 hours.