This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X420, 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 SU40X420
The AirTAC SU32~50 Standard Cylinder SU40X420 is a double-acting profile-type standard cylinder with a Ø40mm bore and 420mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X420, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke420 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X420
- 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 SU40X420
The AirTAC SU40X420 is a discontinued double-acting profile-type cylinder with a 40mm bore and 420mm stroke. AirTAC replaced this unit with the SAU40X420 direct replacement, retaining the exact bore, stroke, force, port and SC-series mounting.
The SAU upgrade keeps the compact extruded aluminum body but uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches. This non-magnet SKU cannot accept a sensor. The SAU line also adds a SAUF built-in-valve option the SU lacked. Note that a 420mm stroke needs external guides to prevent rod bending, and plain cylinders drift without live air so use a rod lock for holding.
Airtac SU32~50 Standard Cylinder SU40X420 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X420 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X420 |
| Bore size | Ø40 mm |
| Stroke | 420 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 SAU40X420 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 SAU40X420 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 SU40X420
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×420 | 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 SU40X420 Is Used
Package Diverting
Pushes medium-weight cartons off a sorting line using 628N of thrust at 0.5MPa over a 420mm reach.
Pallet Positioning
Indexes empty pallets into a wrapping station, utilizing the compact profile to save machine footprint.
Gate Actuation
Operates mid-stroke machine safety gates where the 32kg vertical lift capacity handles the door weight.
Replacing the Airtac SU32~50 Standard Cylinder SU40X420 with the SAU40X420
To replace the SU40X420, order the SAU40X420 direct equivalent, confirming the 40mm bore, 420mm stroke, 1/4" port, M12x1.25 rod thread and SC-series mounting. Because this 420mm stroke exceeds 300mm, add external guides to prevent rod bending under side loads. If you need position sensing, this no-magnet SKU cannot take a switch; the SAU equivalent requires CMSG/DMSG/EMSG sensors rather than the old CS1-B/DS1-B. For higher force, the 50mm bore offers 982N push at 0.5MPa; for less, the 32mm gives 402N. A plain cylinder drifts without live air, so fit an external rod lock or pilot-operated check valve for load holding. The SAUF variant integrates a 4M solenoid valve if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X420
- ✓ 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 SU40X420 FAQ
Yes, the SU40X420 is discontinued. The direct replacement is the AirTAC SAU40X420. It shares the same 40mm bore, 420mm stroke, 1/4" port, output force and SC-series mounting accessories, fitting the exact same application.
It delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf max at 1.0MPa. This specific SKU lacks a magnet and cannot take a sensor. The SAU replacement uses CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B.
Request a Quote for the SAU40X420
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X420 replacement — usually within 7-8 hours.