This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU50X125SFA, 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 SU32~50 Standard Cylinder SU50X125SFA
The AirTAC SU32~50 Standard Cylinder SU50X125SFA 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 SAU50X125SFA, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAU50X125SFA
- 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 SU32~50 Standard Cylinder SU50X125SFA
The AirTAC SU50X125SFA is a discontinued double-acting profile-type cylinder with a 50mm bore, 125mm stroke, and an FA mounting interface. It delivers a push force of 982 N and pull of 825 N at 0.5 MPa. AirTAC replaced this unit with the SAU50X125SFA, a direct alternative retaining the exact extruded aluminum body, 1/4" port, M16x1.5 rod thread, and SC-series mounting compatibility.
Because the extruded profile omits external rods, it is more compact than an ISO 15552 cylinder of the same bore. Note that the -S magnet on this legacy unit worked with CS1-B/DS1-B switches, whereas the SAU replacement uses current CMSG/DMSG/EMSG sensors. The SAU family also adds a SAUF variant with a built-in 4M solenoid valve, an option the SU line never offered.
Airtac SU32~50 Standard Cylinder SU50X125SFA Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU50X125SFA |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU50X125SFA |
| 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 SAU50X125SFA 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 SAU50X125SFA produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SU32~50 Standard Cylinder SU50X125SFA
| 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 SU32~50 Standard Cylinder SU50X125SFA Is Used
Clamping Fixtures
Applies 982 N of push force at 0.5 MPa to hold medium-weight workpieces securely during machining or assembly operations.
Package Diverting
Uses the 125 mm stroke to push cartons off a main conveyor belt, safely handling loads within the 50 kg vertical lift margin.
Material Stops
Acts as a pneumatic stop gate on roller conveyors, utilizing the compact profile body to fit tight transfer station footprints.
Replacing the Airtac SU32~50 Standard Cylinder SU50X125SFA with the SAU50X125SFA
To replace this SU50X125SFA, order the SAU50X125SFA, confirming the 50mm bore, 125mm stroke, 1/4" port (PT/G/NPT), and FA mount. The direct body shares the same 21mm adjustable cushion and 30-800 mm/s speed. If sizing up or down, neighboring bores are 40mm (628 N push @0.5 MPa) and 63mm (1559 N push @0.5 MPa). The -S magnet requires a sensor family change: legacy CS1-B/DS1-B switches will not fit the SAU, which uses CMSG/DMSG/EMSG reed switches. A plain double-acting cylinder drifts on air loss; the cushion only decelerates, so use an external rod lock or pilot-operated check valve for held loads. For self-switching needs, consider the SAUF built-in-valve variant.
Replacement checklist
- ✓ Same bore / stroke → SAU50X125SFA
- ✓ 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 SU32~50 Standard Cylinder SU50X125SFA FAQ
Yes, the SU50X125SFA is discontinued. The direct replacement is the AirTAC SAU50X125SFA. It shares the identical 50mm bore, 125mm stroke, 1/4" port, output force, and SC-series FA mounting accessories, so it fits the same application without mechanical modifications.
At 0.5 MPa it pushes 982 N and pulls 825 N; at 0.7 MPa it pushes 1374 N, with a theoretical max of 200 kgf at 1.0 MPa. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches; when upgrading to the SAU, you must switch to the current CMSG/DMSG/EMSG sensor family.
Related AirTAC SAU Cylinders
Request a Quote for the SAU50X125SFA
Send us the quantity and destination. We confirm price, stock and lead time on the SAU50X125SFA replacement — usually within 7-8 hours.