This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X40STC, 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 SU40X40STC
The AirTAC Airtac SU32~50 Standard Cylinder SU40X40STC is a double-acting profile-type standard cylinder with a Ø40mm bore and 40mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X40STC, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke40 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X40STC
- 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 SU40X40STC
The AirTAC SU40X40STC is a discontinued double-acting profile-type cylinder with a 40 mm bore and 40 mm stroke, delivering 628 N push force at 0.5 MPa. Its extruded aluminum body is more compact than an ISO 15552 unit of the same bore. AirTAC replaced this unit with the SAU40X40STC, a direct replacement retaining the exact bore, stroke, 1/4" port, M12x1.25 rod thread and SC-series TC mounting.
Two key upgrades exist on the SAU: its magnet works with current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches, and the SAUF variant offers a built-in 4M solenoid valve the SU line never had.
Airtac SU32~50 Standard Cylinder SU40X40STC Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X40STC |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X40STC |
| Bore size | Ø40 mm |
| Stroke | 40 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 SAU40X40STC 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 SAU40X40STC 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 SU40X40STC
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 SU40X40STC Is Used
Component Clamping
Secures mid-weight machined parts during milling or drilling, utilizing the 628 N push force at 0.5 MPa for rigid workholding.
Package Diverting
Executes short 40 mm strokes to push small cartons off a main production line onto secondary packaging lanes.
Gate Positioning
Actuates lightweight access doors or material flow gates in compact machinery where the shorter profile body saves space.
Replacing the Airtac SU32~50 Standard Cylinder SU40X40STC with the SAU40X40STC
To replace this discontinued SU40X40STC, order the SAU40X40STC and confirm the 40 mm bore, 40 mm stroke, 1/4" port, and TC mounting accessory are retained. If ordering the -S magnet version, note the sensor family changes from CS1-B/DS1-B to CMSG/DMSG/EMSG. For higher loads, the neighboring 32 mm bore yields 402 N push at 0.5 MPa, while the 50 mm bore provides 982 N. Because this is a double-acting cylinder, it will not hold a load without live air—the 21 mm cushions only decelerate near stroke end; use an external rod lock or pilot-operated check valve for secure holding. The SAUF valve-integrated option can simplify actuation if needed.
Replacement checklist
- ✓ Same bore / stroke → SAU40X40STC
- ✓ 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 SU40X40STC FAQ
Yes, the SU40X40STC is discontinued. The direct replacement is the AirTAC SAU40X40STC. It shares the identical 40 mm bore, 40 mm stroke, 628 N output force, 1/4" port, and TC mounting interface, so it fits the same application directly.
At 0.5 MPa it provides 628 N push and 528 N pull force, increasing to 879 N push at 0.7 MPa, with a theoretical max of 128 kgf at 1.0 MPa. The -S magnet option on this legacy SU works with CS1-B/DS1-B switches, whereas the SAU replacement upgrades to CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X40STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X40STC replacement — usually within 7-8 hours.