This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X400LB, 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 SU40X400LB
The AirTAC SU32~50 Standard Cylinder SU40X400LB is a double-acting profile-type standard cylinder with a Ø40mm bore and 400mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X400LB, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke400 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X400LB
- 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 SU40X400LB
The AirTAC SU40X400LB is a discontinued double-acting profile-type cylinder with a 40mm bore and 400mm stroke. It delivers 628 N push and 528 N pull at 0.5 MPa, utilizing a 1/4" port and an LB mounting interface. AirTAC replaced this end-of-line unit with the SAU40X400LB, a direct upgrade preserving the original bore, stroke, output force, port size, and SC-series mounting accessories.
When upgrading, note the SAU replacement uses modern CMSG/DMSG/EMSG sensors, whereas this legacy model required CS1-B/DS1-B switches. Furthermore, the SAU line introduces a SAUF variant with a built-in 4M solenoid valve the SU lacked. This SKU has no magnet and cannot accept a sensor.
Airtac SU32~50 Standard Cylinder SU40X400LB Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X400LB |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X400LB |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAU40X400LB 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 SAU40X400LB 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 SU40X400LB
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×400 | 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 SU40X400LB Is Used
Pallet Positioning
Shifts empty pallets into a wrapping station, taking advantage of the LB mount to secure the body against lateral shifting.
Replacing the Airtac SU32~50 Standard Cylinder SU40X400LB with the SAU40X400LB
To replace this discontinued SU40X400LB, order the SAU40X400LB direct equivalent, verifying your 1/4" port, M12x1.25 rod thread, and LB mounting. Because this 400mm stroke exceeds 300mm, use an external guide to prevent rod bending and side-load damage. If you need position sensing, this no-magnet SKU cannot take a switch; the SAU -S version supports CMSG/DMSG/EMSG sensors. If sizing up or down, a 50mm bore provides 982 N push at 0.5 MPa, while a 32mm bore offers 402 N. A plain cylinder drifts on air loss—the 21mm cushions only decelerate—so add an external rod lock or pilot-operated check valve for load holding. The SAUF built-in-valve option is available if you need self-switching.
Replacement checklist
- ✓ Same bore / stroke → SAU40X400LB
- ✓ 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 SU40X400LB FAQ
Yes, the SU40X400LB is discontinued. The direct replacement is the SAU40X400LB. It shares the same 40mm bore, 400mm stroke, 628 N push force at 0.5 MPa, 1/4" port, and LB mounting interface, fitting the same application directly.
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. This specific SKU lacks a magnet and cannot accept a sensor; the SAU replacement with a -S option uses CMSG/DMSG/EMSG switches.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X400LB
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X400LB replacement — usually within 7-8 hours.