This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD50X125 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD50X125 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 SUD50X125
The AirTAC Airtac SUD Series Double Rod Cylinder SUD50X125 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 SAUD50X125, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAUD50X125
About the Airtac SUD Series Double Rod Cylinder SUD50X125
The AirTAC SUD50X125 is a double-acting, double-rod profile cylinder featuring a 50mm bore and 125mm stroke. Because a rod exits both ends on one piston, both faces use the rod-side area, making push and pull force equal at 825N @0.5MPa, 1154N @0.7MPa, and 1484N @0.9MPa. This model is discontinued and the exact drop-in replacement is the SAUD50X125, matching the 1/4" port, M16x1.5 rod thread, and FA/LB mounting.
The extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same bore. The dual rods prevent rotation and can drive two tools simultaneously. Without a magnetic piston (-S omitted), this SKU cannot take a switch. Based on the 825N @0.5MPa rating, the safe working load is ~495N (60%), yielding a vertical lift capacity of ~42kg with a 2:1 margin. Note that air cushions only decelerate; use an external rod lock to hold loads.
Airtac SUD Series Double Rod Cylinder SUD50X125 Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD50X125 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD50X125 |
| 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 SAUD50X125 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 SAUD50X125 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 SUD50X125
| 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 SUD50X125 Is Used
Dual-End Transfer Pusher
Uses the extended back rod to push a part on a conveyor while the front rod simultaneously retracts a diverter, keeping both motions synchronized.
Anti-Rotation Gripper Slide
The twin rods prevent piston rotation during the 125mm travel, maintaining precise angular alignment for a pick-and-place gripper without external guides.
Symmetrical Sorter Gate
Drives two opposing sorting flaps from a single piston body, ensuring perfectly mirrored motion to divert packages on a packaging line.
Replacing the Airtac SUD Series Double Rod Cylinder SUD50X125 with the SAUD50X125
To replace the discontinued SUD50X125, use the SAUD50X125 drop-in, keeping the 50mm bore, 125mm stroke, and 1/4" port. Size both directions by checking the equal 825N @0.5MPa force; if more is needed, step up to the 63mm bore (1402N), or down to the 40mm bore (528N). Choose a double rod when you need anti-rotation or to drive two tools. Mounting uses FA or LB brackets (SC-series compatible only). If adding sensors later, the SAUD uses current CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. For this 125mm stroke, side-load is low, but for strokes >=300mm, ensure guide alignment to prevent binding.
Replacement checklist
- ✓ Same bore / stroke → SAUD50X125
- ✓ 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 SUD50X125 FAQ
Yes, the SUD50X125 is discontinued. The exact drop-in replacement is the SAUD50X125, which matches the 50mm bore, 125mm stroke, equal both-ways force, 1/4" port, and FA/LB mounting. The SAUD also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
Because it is a double-rod cylinder, force is equal both ways: 825N @0.5MPa, 1154N @0.7MPa, and 1484N @0.9MPa. The operating speed is 30-800mm/s. The safe working load is ~495N (60% of the 0.5MPa figure), allowing a vertical lift of ~42kg with a 2:1 margin.
Related AirTAC SAU Cylinders
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