This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is SAUD40X125 — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the SAUD40X125 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 SUD40X125
The AirTAC Airtac SUD Series Double Rod Cylinder SUD40X125 is a double-acting profile-type standard cylinder with a Ø40mm bore and 125mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the SAUD40X125, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAUD40X125
About the Airtac SUD Series Double Rod Cylinder SUD40X125
The AirTAC SUD40X125 is a double-acting, double-rod profile cylinder that is officially discontinued; the exact drop-in replacement is the SAUD40X125. Because a rod exits both ends on one piston, the push and pull force are equal at 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. The extruded aluminium profile barrel is shorter than an ISO 15552 cylinder of the same bore. This 40 mm bore unit features a 16 mm rod, a 1/4" port, M12x1.25 rod threads, and 21 mm adjustable cushions at each end. As a non-magnetic SKU, it cannot take a sensor.
Choosing this double-rod design provides anti-rotation stability and allows the back rod to drive a second tool simultaneously. For buyers, the computed safe working load is about 317 N (60% of the 528 N @0.5 MPa figure), yielding a vertical lift capacity of roughly 27 kg with a 2:1 margin. Note that a plain cylinder does not hold loads on air loss; the cushion only decelerates near stroke end, so use an external rod lock for held loads. The SAUD upgrade uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
Airtac SUD Series Double Rod Cylinder SUD40X125 Technical Specifications
| Model | Airtac SUD Series Double Rod Cylinder SUD40X125 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAUD40X125 |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | 1/4" |
| Rod thread | M12×1.25 |
| 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 SAUD40X125 carries the same ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
The SAUD40X125 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 SUD40X125
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | 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 SUD40X125 Is Used
Dual-Tool Transfer
Uses the rear rod extension to drive a secondary pick-and-place mechanism simultaneously with the primary front tool, saving space.
Anti-Rotation Pusher
Pushes parts along a belt without rotational drift, maintaining precise alignment thanks to the symmetric double-rod guidance.
Compact Sorting Divert
Fits into tight profile-body machinery footprints to divert packages on a line, offering equal force in both extend and retract directions.
Replacing the Airtac SUD Series Double Rod Cylinder SUD40X125 with the SAUD40X125
To replace the discontinued SUD40X125, order the drop-in SAUD40X125, which matches the 40 mm bore, 125 mm stroke, 1/4" port, and FA/LB mounting. Size both ways by checking neighbouring bores while verifying the equal push/pull force fits your load. A double rod is right when you need anti-rotation stability or a back rod to drive a second tool. This non-magnetic SKU cannot take a sensor; the SAUD upgrade uses CMSG/DMSG/EMSG sensors instead of the old CS1-B/DS1-B. For strokes >=300 mm, confirm the side-load rating to prevent guide wear. Mounting is compatible with the AirTAC SC series only.
Replacement checklist
- ✓ Same bore / stroke → SAUD40X125
- ✓ 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 SUD40X125 FAQ
Yes, the SUD40X125 is discontinued. The exact drop-in replacement is the SAUD40X125, which shares the same 40 mm bore, 125 mm stroke, 1/4" port, and FA/LB mounting. The SAUD also uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B.
The force is equal both ways: 528 N @0.5 MPa, 739 N @0.7 MPa, and 950 N @0.9 MPa. It operates at 30-800 mm/s with a 1/4" port and 21 mm adjustable cushions at each end.
Related AirTAC SAU Cylinders
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