This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X400N, 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 SU40X400N
The AirTAC SU32~50 Standard Cylinder SU40X400N is a double-acting profile-type standard cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X400N, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X400N
- 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 SU40X400N
The AirTAC SU40X400N is a discontinued double-acting profile-type cylinder with a 40mm bore and 400mm stroke. As an end-of-line unit, it is replaced by the SAU40X400N, a direct alternative retaining the exact 1/4" port, M12x1.25 rod thread, 21mm cushions, and SC-series mounting. Because this SKU lacks a magnet, it cannot accept a position sensor. The NBR seal suits standard -20 to +70 C environments.
This bore yields 628 N push and 528 N pull at 0.5 MPa, peaking at a 128 kgf theoretical max. The SAU upgrade introduces CMSG/DMSG/EMSG sensors and a SAUF valve-integrated option, while the compact extruded body remains shorter than a same-bore ISO 15552 unit.
Airtac SU32~50 Standard Cylinder SU40X400N Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X400N |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X400N |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAU40X400N 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 SAU40X400N 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 SU40X400N
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SU40X400N Is Used
Package Diversion
Pushes cartons at 30-800 mm/s along a sorting line, using the 628 N push force at 0.5 MPa to deflect goods without stalling.
Pallet Stopper Gate
Acts as a 400mm stroke barrier for pallet entry, dropping down to halt workflow while the NBR seals endure typical shop floor temperatures.
Component Ejection
Clears machined parts from a fixture using the 528 N pull force, relying on the 21mm adjustable cushions to soften end-of-stroke impact.
Replacing the Airtac SU32~50 Standard Cylinder SU40X400N with the SAU40X400N
To replace the SU40X400N, order the SAU40X400N, verifying the 40mm bore, 400mm stroke, 1/4" port, and NBR seal. If you need position sensing, this no-magnet SKU cannot support it; you must specify an -S magnet on the SAU, which then uses CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B. If neighbouring bores fit your envelope, a 32mm bore offers 402 N push at 0.5 MPa, while a 50mm bore provides 982 N. For the 400mm stroke, use external guides to prevent rod bending and side-load wear. The cushion only decelerates; use a pilot-operated check valve or rod lock to hold loads. The SAUF variant adds a built-in 4M valve if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X400N
- ✓ 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 SU40X400N FAQ
Yes, the AirTAC SU40X400N is discontinued. The direct replacement is the SAU40X400N. It shares the same 40mm bore, 400mm stroke, 1/4" port, output force, and SC-series mounting accessories, so it fits the same application directly.
At 0.5 MPa it provides 628 N push and 528 N pull; at 0.7 MPa it pushes 879 N, and the theoretical max is 128 kgf at 1.0 MPa. Because this specific SKU lacks an -S magnet, it cannot accept a position sensor. If sensing is required, order the SAU with an -S magnet, which uses the current CMSG/DMSG/EMSG switches.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X400N
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X400N replacement — usually within 7-8 hours.