This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD50X125S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD50X125S 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 SUD Series Double Rod Cylinder SUD50X125S
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X125S 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 SAUD50X125S, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X125S
About the Airtac SUD Series Double Rod Cylinder SUD50X125S
The AirTAC SUD50X125S is a double-acting, double-rod profile cylinder featuring a 50mm bore and 125mm stroke. A rod exits both ends on one piston, meaning both faces use the rod-side area and push and pull force are equal at 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. This model is discontinued and the exact drop-in replacement is the SAUD50X125S, which retains the same extruded aluminium profile barrel, 1/4" port, M16x1.5 rod thread, and FA/LB mounting.
The double-rod design provides anti-rotation stability and allows the back rod to carry a sensor cam, driving two tools simultaneously. With a safe working load of roughly 495 N (about 60% of the 825 N @0.5 MPa figure), it yields a vertical lift capacity of approximately 42 kg with a 2:1 margin. This SUD50X125S includes a piston magnet for legacy CS1-B/DS1-B switches, whereas the SAUD replacement uses current CMSG/DMSG/EMSG sensors. A plain cylinder does not hold loads on air loss; the 21mm adjustable air cushion only decelerates near stroke end, so use an external rod lock for held loads.
Airtac SUD Series Double Rod Cylinder SUD50X125S Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X125S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X125S |
| 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 SAUD50X125S 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 SAUD50X125S 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 SUD Series Double Rod Cylinder SUD50X125S
| 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 SUD Series Double Rod Cylinder SUD50X125S Is Used
Dual-Tool Machining Station
Drives two opposing tools simultaneously from one piston, utilising the equal both-ways force for balanced material removal without rotation.
Transfer Pusher Assembly
Uses the rear exiting rod to carry a sensor cam, providing precise position feedback while the front rod pushes parts down the line.
Vertical Lift Gate
Lifts a 42 kg gate with a 2:1 safety margin at 0.5 MPa, relying on the double-rod design to prevent binding during vertical travel.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X125S with the SAUD50X125S
To replace the discontinued SUD50X125S, order the drop-in SAUD50X125S, keeping the 50mm bore, 125mm stroke, 1/4" port, and FA/LB mounting identical. Size both ways by checking neighbouring bores (40mm or 63mm) while ensuring the equal both-ways force fits your requirement. Choose a double-rod cylinder when you need anti-rotation stability or want to drive two tools from one piston. For this -S model, note the sensor change from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG. For stroke lengths of 300mm or greater, verify the side-load line to prevent guide wear.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X125S
- ✓ 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 SUD Series Double Rod Cylinder SUD50X125S FAQ
Yes, the SUD50X125S is discontinued. The exact drop-in replacement is the SAUD50X125S, which matches the 50mm bore, 125mm stroke, equal both-ways force, 1/4" port, and FA/LB mounting. You only need to update the sensors from legacy CS1-B/DS1-B to current CMSG/DMSG/EMSG.
Because it is a double-rod cylinder, the push and pull force are equal both ways: 825 N @0.5 MPa, 1154 N @0.7 MPa, and 1484 N @0.9 MPa. The air port is 1/4" and the rod-end thread is M16x1.5. It operates at 0.15-1.0 MPa with a 21mm adjustable cushion at each end.
Related AirTAC SAU Cylinders
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