This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X320, 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 SU40X320
The AirTAC Airtac SU32~50 Standard Cylinder SU40X320 is a double-acting profile-type standard cylinder with a Ø40mm bore and 320mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X320, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke320 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X320
- 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 SU40X320
The AirTAC SU40X320 is a discontinued double-acting profile-type cylinder featuring a 40mm bore, 320mm stroke, and a 1/4" port. Delivering 628N push force at 0.5MPa, it is replaced directly by the SAU40X320, which matches the original bore, stroke, output, port, and SC-series mounting.
This compact extruded-aluminium body is shorter than an ISO 15552 equivalent of the same bore. Because this SKU lacks a magnet, it cannot accept a sensor, though the SAU upgrade accommodates modern CMSG/DMSG/EMSG switches on its -S variants.
Airtac SU32~50 Standard Cylinder SU40X320 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X320 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X320 |
| Bore size | Ø40 mm |
| Stroke | 320 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 SAU40X320 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 SAU40X320 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 SU40X320
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×320 | 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 SU40X320 Is Used
Package Diversion
Pushes medium-weight cartons off a sorting line using the 628N push force at 0.5MPa over the 320mm travel distance.
Pallet Positioning
Indexes empty pallets into a loading cell, utilizing the compact profile body to fit tight conveyor frame clearances.
Clamp Actuation
Drives a secondary clamping arm on a machining fixture, safely holding workpieces with an approximate 377N working load.
Replacing the Airtac SU32~50 Standard Cylinder SU40X320 with the SAU40X320
To replace the SU40X320, order the SAU40X320 direct equivalent, verifying your 1/4" port, M12x1.25 rod thread, and SC-series mounting hardware. If downsizing, a 32mm bore yields 402N push at 0.5MPa; if upsizing, a 50mm bore provides 982N. Note that this non-magnetic SKU cannot support sensing, whereas an SAU-S variant uses CMSG/DMSG/EMSG switches. For the 320mm stroke, fit an external guide to prevent rod bending under side loads. A plain cylinder drifts on air loss—the cushion only decelerates—so add a rod lock or pilot-operated check valve for load holding. The SAUF variant offers a built-in valve the SU lacked.
Replacement checklist
- ✓ Same bore / stroke → SAU40X320
- ✓ 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 SU40X320 FAQ
Yes, the AirTAC SU40X320 is discontinued. The direct replacement is the SAU40X320. It shares the identical 40mm bore, 320mm stroke, 628N force at 0.5MPa, 1/4" port, and SC-series mounting, so it fits the same application directly.
The 40mm bore provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical max of 128kgf at 1.0MPa. Because this specific SKU has no magnet, it cannot take a sensor. If sensing is needed, the SAU replacement with an -S suffix uses CMSG/DMSG/EMSG switches.
Request a Quote for the SAU40X320
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X320 replacement — usually within 7-8 hours.