This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X55S, 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 SU40X55S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X55S is a double-acting profile-type standard cylinder with a Ø40mm bore and 55mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X55S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke55 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X55S
- 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 SU40X55S
The AirTAC SU40X55S is a discontinued double-acting profile cylinder with a 40mm bore and 55mm stroke, delivering 628N push and 528N pull at 0.5MPa. AirTAC replaced it with the SAU40X55S, a direct upgrade sharing the exact bore, stroke, output force, 1/4" port, and SC-series mounting footprint.
This compact extruded-aluminum body is shorter than a standard ISO 15552 unit of the same bore. The -S magnet on this legacy SKU worked with CS1-B/DS1-B switches, but the SAU replacement requires current CMSG/DMSG/EMSG sensors. Note that a plain cylinder drifts without live air; use an external rod lock for held loads.
Airtac SU32~50 Standard Cylinder SU40X55S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X55S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X55S |
| Bore size | Ø40 mm |
| Stroke | 55 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 SAU40X55S 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 SAU40X55S 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 SU40X55S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SU40X55S Is Used
Package Diverting
Provides reliable 55mm stroke actuation to deflect small cartons on a sorting line without requiring excessive space.
Replacing the Airtac SU32~50 Standard Cylinder SU40X55S with the SAU40X55S
To replace this SU40X55S, order the SAU40X55S and verify your 1/4" port threads (PT, G, or NPT) and M12x1.25 rod-end connection. Because this SKU has the -S magnet, you must upgrade your legacy CS1-B/DS1-B switches to the CMSG/DMSG/EMSG family. If you need a self-switching function, the SAU line offers the SAUF variant with a built-in 4M solenoid valve, which the SU series lacked. When sizing, check neighboring bores: a 32mm bore yields 402N push at 0.5MPa, while a 50mm bore provides 982N. Remember that the adjustable 21mm air cushions only decelerate the piston near stroke end; they do not hold the load on air loss, so add a pilot-operated check valve for vertical lifting.
Replacement checklist
- ✓ Same bore / stroke → SAU40X55S
- ✓ 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 SU40X55S FAQ
Yes, the AirTAC SU40X55S is discontinued. The direct replacement is the SAU40X55S. It matches the 40mm bore, 55mm stroke, 628N push force at 0.5MPa, 1/4" port, and SC-series mounting accessories, so it drops directly into the same application.
The SAU40X55S delivers 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N at 0.9MPa, and a theoretical max of 128kgf at 1.0MPa. Because your old SU40X55S used a -S magnet with legacy CS1-B/DS1-B switches, you must upgrade to the current CMSG/DMSG/EMSG sensor family for the SAU replacement.
Request a Quote for the SAU40X55S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X55S replacement — usually within 7-8 hours.