This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X33S, 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 SU40X33S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X33S is a double-acting profile-type standard cylinder with a Ø40mm bore and 33mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X33S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke33 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X33S
- 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 SU40X33S
The AirTAC SU40X33S is a discontinued double-acting profile-type cylinder with a 40mm bore and 33mm stroke. Delivering 628 N push force at 0.5 MPa, it features a 1/4" port and an extruded aluminum body that is shorter and more compact than an ISO 15552 cylinder of the same bore. AirTAC replaced this legacy unit with the SAU40X33S, a direct replacement retaining the exact bore, stroke, force, port size, and SC-series mounting.
The -S magnet on this SU worked with legacy CS1-B/DS1-B switches, but the SAU replacement upgrades to current CMSG/DMSG/EMSG sensors. The SAU family also introduces the SAUF built-in 4M solenoid valve option, a self-switching variant the SU line never offered.
Airtac SU32~50 Standard Cylinder SU40X33S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X33S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X33S |
| Bore size | Ø40 mm |
| Stroke | 33 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 SAU40X33S 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 SAU40X33S 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 SU40X33S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×33 | 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 SU40X33S Is Used
Small Part Ejection
Uses the 628 N push force at 0.5 MPa to reliably push lightweight molded components out of a machining center.
Package Diverting
Short 33mm stroke actuates a diverting gate on a packaging line, safely handling loads near the 32 kg vertical lift margin.
Bin Push-Off
Compact profile body fits tight conveyor frames to push sorted totes into dispatch chutes without external rod obstruction.
Replacing the Airtac SU32~50 Standard Cylinder SU40X33S with the SAU40X33S
To replace this SU40X33S, order the SAU40X33S direct equivalent, verifying the 40mm bore, 33mm stroke, M12x1.25 rod thread, 1/4" port (PT/G/NPT), and SC-series mounting hardware. Because this is an -S magnet model, note the sensor family change: legacy CS1-B/DS1-B switches are replaced by CMSG/DMSG/EMSG sensors on the SAU. If you need more force, the neighboring 50mm bore offers 982 N push at 0.5 MPa; if less is required, the 32mm bore provides 402 N. A plain cylinder does not hold load on air loss—the cushion only decelerates—so add an external rod lock or pilot-operated check valve for vertical holding. For self-switching needs, consider the SAUF valve-integrated variant.
Replacement checklist
- ✓ Same bore / stroke → SAU40X33S
- ✓ 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 SU40X33S FAQ
Yes, the AirTAC SU40X33S is discontinued. The direct replacement is the SAU40X33S. It matches the 40mm bore, 33mm stroke, 1/4" port, output force, and SC-series mounting, so it fits the same application. You just order the SAU equivalent.
This double-acting cylinder provides 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. The -S suffix denotes a piston magnet for legacy CS1-B/DS1-B switches; the SAU replacement uses current CMSG/DMSG/EMSG sensors.
Request a Quote for the SAU40X33S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X33S replacement — usually within 7-8 hours.