This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU50X312SN, 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 SU50X312SN
The AirTAC SU32~50 Standard Cylinder SU50X312SN is a double-acting profile-type standard cylinder with a Ø50mm bore and 312mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU50X312SN, which matches its bore, stroke, force and mounting.
- BoreØ50 mm
- Stroke312 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM16×1.5
- StatusDiscontinued → SAU50X312SN
- 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 SU50X312SN
The AirTAC SU50X312SN is a discontinued double-acting profile-type cylinder with a 50mm bore and 312mm stroke. It delivers 982N push and 825N pull at 0.5MPa, operating at 30-800mm/s through a 1/4" port. The direct replacement is the SAU50X312SN, matching the bore, stroke, force, port, and SC-series mounting. This extruded aluminium body is more compact than an ISO 15552 cylinder of the same size.
Two key upgrades exist in the SAU replacement: the legacy CS1-B/DS1-B sensors are replaced by current CMSG/DMSG/EMSG switches, and the SAU line introduces a SAUF built-in-valve option the SU lacked. Note the NBR seal limits heat to 70C, and the 312mm stroke requires external guides to prevent rod bending.
Airtac SU32~50 Standard Cylinder SU50X312SN Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU50X312SN |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU50X312SN |
| Bore size | Ø50 mm |
| Stroke | 312 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 SAU50X312SN 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 SAU50X312SN 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 SU50X312SN
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 50 | Bore size in mm. |
| ×312 | 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 SU50X312SN Is Used
Package Diversion
Pushes 50kg cartons at 982N thrust onto secondary lines, using the 312mm stroke to clear the main belt.
Pallet Stopping
Halts inbound pallets at a packing cell, absorbing kinetic energy via the 21mm adjustable air cushions.
Light Pressing
Applies 589N of safe downward clamping force to hold lightweight components during assembly.
Replacing the Airtac SU32~50 Standard Cylinder SU50X312SN with the SAU50X312SN
To replace this discontinued SU50X312SN, order the SAU50X312SN, ensuring the 50mm bore, 312mm stroke, 1/4" port, and M16x1.5 rod thread match your existing setup. Because this unit has a 312mm stroke, you must use external guide rails to prevent side-load and rod-bending issues. If sizing both ways, a 40mm bore offers 628N push at 0.5MPa, while a 63mm bore yields 1559N. The -S magnet means you must upgrade your switches from CS1-B/DS1-B to CMSG/DMSG/EMSG. The NBR seal handles up to 70C. For load holding, the cushion only decelerates; use an external rod lock or pilot-operated check valve to prevent drift on air loss. If you need integrated control, explore the SAUF variant with a built-in 4M solenoid valve.
Replacement checklist
- ✓ Same bore / stroke → SAU50X312SN
- ✓ 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 SU50X312SN FAQ
Yes, the SU50X312SN is discontinued. The direct replacement is the SAU50X312SN. It matches the 50mm bore, 312mm stroke, 982N force, 1/4" port, and SC-series mounting. You simply order the SAU equivalent.
At 0.5MPa it pushes 982N and pulls 825N; at 0.7MPa it pushes 1374N, and the theoretical max is 200kgf at 1.0MPa. Because this SKU has a magnet (-S), the legacy CS1-B/DS1-B switches are obsolete; the SAU replacement uses current CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU50X312SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAU50X312SN replacement — usually within 7-8 hours.