This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X70S, 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 SU40X70S
The AirTAC Airtac SU32~50 Standard Cylinder SU40X70S is a double-acting profile-type standard cylinder with a Ø40mm bore and 70mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X70S, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke70 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X70S
- 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 SU40X70S
The AirTAC SU40X70S is a discontinued double-acting profile-type cylinder featuring a 40mm bore, 70mm stroke, and a built-in piston magnet. It delivers 628N push and 528N pull at 0.5MPa. AirTAC replaced this end-of-life unit with the SAU40X70S, a direct replacement retaining the exact 1/4" port, M12x1.25 rod thread, and SC-series mounting.
The SAU upgrade keeps the compact extruded aluminium body (shorter than an ISO 15552 equivalent) but switches the -S magnet sensor compatibility from legacy CS1-B/DS1-B to the modern CMSG/DMSG/EMSG family. The SAU line also introduces the SAUF built-in 4M solenoid valve option, which the SU never offered.
Airtac SU32~50 Standard Cylinder SU40X70S Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X70S |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X70S |
| Bore size | Ø40 mm |
| Stroke | 70 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 SAU40X70S 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 SAU40X70S 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 SU40X70S
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 SU40X70S Is Used
Component Clamping
Secures mid-weight machined parts during milling or drilling, utilising the 628N push force at 0.5MPa for rigid workholding.
Package Diverting
Actuates a 70mm stroke routing gate to push small to medium cartons off a main production line at speeds up to 800mm/s.
Replacing the Airtac SU32~50 Standard Cylinder SU40X70S with the SAU40X70S
To replace this SU40X70S, order the SAU40X70S direct equivalent, verifying your 1/4" port thread (PT/G/NPT) and SC-series mounting hardware (LB/FA/FB/CA/CB). Because this SKU includes the -S magnet, note that your legacy CS1-B/DS1-B switches must change to CMSG/DMSG/EMSG sensors on the new SAU body. If your application needs true load holding on air loss, a plain cylinder drifts (the 21mm cushions only decelerate), so add an external rod lock or pilot-operated check valve. For higher force needs, stepping up to a 50mm bore yields 982N push at 0.5MPa; dropping to a 32mm bore provides 402N. If you want to simplify plumbing, explore the SAUF variant with its integrated valve.
Replacement checklist
- ✓ Same bore / stroke → SAU40X70S
- ✓ 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 SU40X70S FAQ
Yes, the AirTAC SU40X70S is discontinued. The direct replacement is the SAU40X70S. It shares the identical 40mm bore, 70mm stroke, 1/4" port, output force, and SC-series mounting, so it fits the same application directly.
The 40mm bore generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, and a theoretical max of 128kgf at 1.0MPa. Because this is an -S magnet model, the legacy CS1-B/DS1-B switches are retired; the SAU replacement requires the current CMSG/DMSG/EMSG sensor family.
Request a Quote for the SAU40X70S
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X70S replacement — usually within 7-8 hours.