This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU50X400STC, 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 SU50X400STC
The AirTAC SU32~50 Standard Cylinder SU50X400STC is a double-acting profile-type standard cylinder with a Ø50mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU50X400STC, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAU50X400STC
- 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 SU50X400STC
The AirTAC SU50X400STC is a discontinued double-acting profile cylinder with a 50mm bore and 400mm stroke. It delivers 982 N push and 825 N pull at 0.5 MPa, utilizing a 1/4" port and M16x1.5 rod thread. AirTAC replaced this unit with the SAU50X400STC, a direct replacement retaining the exact bore, stroke, force, port, and SC-series TC mounting interface.
The SAU upgrade uses current CMSG/DMSG/EMSG sensors instead of this unit's legacy CS1-B/DS1-B switches, and introduces the SAUF built-in-valve variant. Remember that air cushions only decelerate; use an external rod lock to hold loads.
Airtac SU32~50 Standard Cylinder SU50X400STC Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU50X400STC |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU50X400STC |
| Bore size | Ø50 mm |
| Stroke | 400 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 SAU50X400STC 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 SAU50X400STC 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 SU50X400STC
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | 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 SU50X400STC Is Used
Package Diverter
Pushes medium-weight cartons off a sorting line using the 982 N push force at 0.5 MPa, with TC mount allowing rigid side fixing.
Pallet Stopper Gate
Acts as a 400mm travel barrier for pallet accumulation, though an external rod lock is required to prevent drift when air is removed.
Vertical Press
Provides up to 1374 N at 0.7 MPa for light pressing tasks, requiring external guidance to prevent rod bending over the long stroke.
Replacing the Airtac SU32~50 Standard Cylinder SU50X400STC with the SAU50X400STC
To replace this SU50X400STC, order the SAU50X400STC, confirming the 50mm bore, 400mm stroke, 1/4" port, and TC mounting. Because this SKU includes a magnet (-S), you must upgrade your sensors: the legacy CS1-B/DS1-B switches will not fit the SAU, requiring CMSG/DMSG/EMSG equivalents. If you need self-switching, explore the SAUF valve-integrated option. For sizing alternatives, dropping to a 40mm bore yields 628 N push at 0.5 MPa, while a 63mm bore provides 1559 N. At 400mm stroke, prevent rod bending by guiding the load externally. A plain cylinder drifts on air loss, so add a pilot-operated check valve for load holding.
Replacement checklist
- ✓ Same bore / stroke → SAU50X400STC
- ✓ 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 SU50X400STC FAQ
Yes, the SU50X400STC is discontinued. The direct replacement is the AirTAC SAU50X400STC. It matches the 50mm bore, 400mm stroke, 982 N force at 0.5 MPa, 1/4" port, and TC mounting. You simply order the SAU equivalent.
It delivers 982 N push and 825 N pull at 0.5 MPa, 1374 N push at 0.7 MPa, and a theoretical max of 200 kgf at 1.0 MPa. Because this model has a magnet (-S), it used CS1-B/DS1-B sensors; the SAU replacement requires CMSG/DMSG/EMSG switches.
Related AirTAC SAU Cylinders
Request a Quote for the SAU50X400STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAU50X400STC replacement — usually within 7-8 hours.