This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X388SN, 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 SU40X388SN
The AirTAC Airtac SU32~50 Standard Cylinder SU40X388SN is a double-acting profile-type standard cylinder with a Ø40mm bore and 388mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X388SN, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke388 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X388SN
- 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 SU40X388SN
The AirTAC SU40X388SN is a discontinued double-acting profile-type cylinder with a 40mm bore and 388mm stroke. Delivering 628N push and 528N pull at 0.5MPa, it features an extruded aluminum barrel and 1/4" port. AirTAC replaced this EOL unit with the SAU40X388SN, a direct upgrade retaining the exact bore, stroke, output force, port size, and SC-series mounting compatibility.
The SAU upgrade introduces CMSG/DMSG/EMSG sensors, replacing the legacy CS1-B/DS1-B switches used on this -S magnet model. The SAU family also adds a SAUF built-in 4M solenoid valve variant the SU line lacked. Note the 388mm stroke is non-standard; the 21mm adjustable cushions only decelerate the load, so an external rod lock is required to hold position.
Airtac SU32~50 Standard Cylinder SU40X388SN Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X388SN |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X388SN |
| Bore size | Ø40 mm |
| Stroke | 388 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 SAU40X388SN 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 SAU40X388SN 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 SU40X388SN
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×388 | 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 SU40X388SN Is Used
Package Diversion
Pushes medium-weight cartons at 30-800 mm/s on sorting lines, utilizing the 628N push force to reliably actuate routing gates without rebound.
Pallet Positioning
Indexes empty pallets into a stretch wrapper using the 388mm stroke, requiring an external guide to prevent rod bending over the long travel distance.
Component Ejection
Ejects machined parts from a fixture, where the 21mm adjustable cushions decelerate the 528N pull force smoothly at cycle end to protect delicate tooling.
Replacing the Airtac SU32~50 Standard Cylinder SU40X388SN with the SAU40X388SN
To replace this discontinued SU40X388SN, order the SAU40X388SN direct equivalent, verifying your 1/4" port, M12x1.25 rod thread, and SC-series mounting (LB/FA/FB/CA/CB). Because the 388mm stroke is non-standard, carefully confirm the exact length. If you need more force, the neighboring 50mm bore yields 982N push at 0.5MPa; if less is acceptable, the 32mm bore provides 402N. The -S magnet means you must migrate from CS1-B/DS1-B switches to the modern CMSG/DMSG/EMSG sensors on the SAU. The -N NBR seal supports -20 to +70C (a Viton H option raises this to 150C). At 388mm, prevent rod bending by using an external guide to handle side loads. The air cushion only decelerates; use a pilot-operated check valve for load holding. The SAUF variant offers a built-in valve if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X388SN
- ✓ 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 SU40X388SN FAQ
Yes, the SU40X388SN is discontinued. The direct replacement is the AirTAC SAU40X388SN. It shares the same 40mm bore, 388mm stroke, 1/4" port, output force, and SC-series mounting accessories, so it fits the same application directly.
The 40mm bore provides 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a 128kgf maximum at 1.0MPa. Because this SKU has a magnet (-S), it used legacy CS1-B/DS1-B switches; the SAU replacement requires upgrading to current CMSG/DMSG/EMSG sensors.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X388SN
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X388SN replacement — usually within 7-8 hours.