This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X425S, 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 SU40X425S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X425S is a double-acting profile-type standard cylinder with a Ø40mm bore and 425mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X425S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke425 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X425S
- 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 SU40X425S
The AirTAC SU40X425S is a discontinued double-acting profile-type cylinder with a 40mm bore and 425mm stroke, delivering 628N push force at 0.5MPa through a 1/4" port. AirTAC replaced this legacy unit with the SAU40X425S, a direct replacement retaining the exact bore, stroke, output force, and SC-series mounting.
Because this SKU includes a magnet (-S), it originally used CS1-B/DS1-B switches; the SAU replacement upgrades to current CMSG/DMSG/EMSG sensors. The extruded aluminum body is more compact than an ISO 15552 equivalent.
Airtac SU32~50 Standard Cylinder SU40X425S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X425S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X425S |
| Bore size | Ø40 mm |
| Stroke | 425 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 SAU40X425S 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 SAU40X425S 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 SU40X425S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×425 | 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 SU40X425S Is Used
Package Diverting
Pushes light to medium cartons across transfer belts using the 628N push force at 0.5MPa over the 425mm travel.
Component Ejection
Ejects machined parts from a fixture, utilizing the adjustable 21mm cushions to decelerate the rod at stroke end.
Replacing the Airtac SU32~50 Standard Cylinder SU40X425S with the SAU40X425S
To replace this discontinued SU40X425S, order the SAU40X425S direct, confirming the 40mm bore, 425mm stroke, 1/4" port, M12x1.25 rod thread, and SC-series mounting. If your machine relied on the -S magnet, note the sensor family changes from CS1-B/DS1-B to CMSG/DMSG/EMSG. When sizing both ways, a 32mm bore offers 402N push at 0.5MPa, while a 50mm bore provides 982N. For the 425mm stroke, add external guides to prevent rod bending under side loads. This cylinder will not hold a load without live air; use an external rod lock or pilot-operated check valve, as cushions only decelerate. The SAUF built-in-valve variant is available if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X425S
- ✓ 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 SU40X425S FAQ
Yes, the SU40X425S is discontinued. The direct replacement is the AirTAC SAU40X425S, offering the same 40mm bore, 425mm stroke, 1/4" port, and SC-series mounting compatibility.
It provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf max at 1.0MPa. The -S magnet used legacy CS1-B/DS1-B switches; the SAU replacement uses CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X425S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X425S replacement — usually within 7-8 hours.