This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X250, 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 SU40X250
The AirTAC Airtac SU32~50 Standard Cylinder SU40X250 is a double-acting profile-type standard cylinder with a Ø40mm bore and 250mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X250, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke250 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X250
- 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 SU40X250
The AirTAC SU40X250 is a discontinued double-acting profile-type cylinder with a 40mm bore and 250mm stroke. It delivers 628 N push and 528 N pull at 0.5 MPa, utilizing a 1/4" port and a Ø16 mm piston rod. AirTAC replaced this end-of-life unit with the SAU40X250, a direct upgrade retaining the exact same body dimensions, force output, port size, and SC-series mounting accessories.
Because this specific SKU lacks a magnet (-S), it cannot accept a position sensor. If sensing is required on the SAU40X250 upgrade, you must order the -S version, which transitions from the legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG family. The SAU line also introduces the SAUF variant with a built-in 4M solenoid valve, an option the SU series never offered.
Airtac SU32~50 Standard Cylinder SU40X250 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X250 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X250 |
| Bore size | Ø40 mm |
| Stroke | 250 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 SAU40X250 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 SAU40X250 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 SU40X250
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×250 | 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 SU40X250 Is Used
Package Diverting
Ideal for pushing lightweight to medium cartons on a 250mm stroke, utilizing the 628 N push force at 0.5 MPa to actuate routing gates without overpowering the packaging.
Pallet Stopping
Deploys a 250mm stroke to halt incoming pallets at a workstation, safely absorbing kinetic energy using the adjustable 21 mm air cushions at both ends.
Replacing the Airtac SU32~50 Standard Cylinder SU40X250 with the SAU40X250
To replace the discontinued SU40X250, order the SAU40X250, confirming the 1/4" port, M12x1.25 rod thread, and PT/G/NPT thread preference. Since this original SKU has no magnet, it cannot support sensing; if your application requires switches, specify the SAU40X250S and upgrade to CMSG/DMSG/EMSG sensors. When sizing, check neighboring bores: a 32mm bore yields 402 N push at 0.5 MPa (too small), while a 50mm bore provides 982 N if you need more force. Note that a plain cylinder does not hold a load on air loss—the 21 mm adjustable cushions only decelerate near stroke ends. For strict load holding, install an external rod lock or pilot-operated check valve. At 250mm stroke, ensure adequate guidance to prevent rod bending under side loads. The SAUF valve-integrated model is available if you need self-switching logic.
Replacement checklist
- ✓ Same bore / stroke → SAU40X250
- ✓ 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 SU40X250 FAQ
Yes, the SU40X250 is discontinued. The direct replacement is the AirTAC SAU40X250. It shares the identical 40mm bore, 250mm stroke, 628 N output force at 0.5 MPa, 1/4" port, and SC-series mounting hardware, fitting the same space with zero modifications.
The bore delivers 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and a theoretical max of 128 kgf at 1.0 MPa. This specific non-magnetic SKU cannot take a sensor. The SAU40X250S replacement uses CMSG/DMSG/EMSG switches, replacing the older CS1-B/DS1-B sensors.
Request a Quote for the SAU40X250
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X250 replacement — usually within 7-8 hours.