This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X385S, 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 SU40X385S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X385S is a double-acting profile-type standard cylinder with a Ø40mm bore and 385mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X385S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke385 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X385S
- 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 SU40X385S
The AirTAC SU40X385S is a discontinued double-acting profile-type cylinder with a 40mm bore and 385mm stroke. Delivering 628 N push force at 0.5 MPa, it features an extruded aluminum barrel and adjustable air cushions at both ends. AirTAC replaced this legacy unit with the SAU40X385S, a direct replacement matching the exact bore, stroke, output force, 1/4" port, and SC-series mounting.
The SAU upgrade retains the compact profile body but modernizes the sensor groove to accept current CMSG/DMSG/EMSG switches, whereas this older -S SKU relied on legacy CS1-B/DS1-B reed sensors. The new SAU line also introduces a SAUF variant with a built-in 4M solenoid valve that the SU series lacked.
Airtac SU32~50 Standard Cylinder SU40X385S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X385S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X385S |
| Bore size | Ø40 mm |
| Stroke | 385 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 SAU40X385S 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 SAU40X385S 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 SU40X385S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×385 | 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 SU40X385S Is Used
Light Pressing
Provides consistent 628 N downward pressure at 0.5 MPa for seating small bearings or aligning lightweight components during assembly.
Replacing the Airtac SU32~50 Standard Cylinder SU40X385S with the SAU40X385S
To replace this SU40X385S, order the SAU40X385S and verify your 1/4" port thread (PT, G, or NPT), M12x1.25 rod-end thread, and SC-series mounting hardware. Because the -S magnet is present, note the mandatory sensor family change: legacy CS1-B/DS1-B switches must be swapped for CMSG/DMSG/EMSG sensors on the SAU. A plain cylinder does not hold load on air loss—the cushion only decelerates—so use an external rod lock or pilot-operated check valve for suspended loads. At 385 mm, this long stroke risks rod bending under side loads; always use external guides to prevent premature seal wear. If you need less force, step down to a 32mm bore (402 N push); if you need more, step up to a 50mm bore (982 N push).
Replacement checklist
- ✓ Same bore / stroke → SAU40X385S
- ✓ 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 SU40X385S FAQ
Yes, the AirTAC SU40X385S is discontinued and end-of-life. The direct replacement is the SAU40X385S. It shares the same 40mm bore, 385mm stroke, output force, 1/4" port, and SC-series mounting accessories, so it fits the same application directly.
The SAU40X385S 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. Because your old model has a magnet (-S), you must upgrade from legacy CS1-B/DS1-B switches to the current CMSG/DMSG/EMSG sensor family on the new SAU cylinder.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X385S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X385S replacement — usually within 7-8 hours.