This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X125STC, 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 SU40X125STC
The AirTAC SU32~50 Standard Cylinder SU40X125STC is a double-acting profile-type standard cylinder with a Ø40mm bore and 125mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X125STC, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke125 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X125STC
- 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 SU40X125STC
The AirTAC SU40X125STC is a discontinued double-acting profile-type cylinder with a 40mm bore and 125mm stroke. It delivers 628N push and 528N pull at 0.5MPa, utilizing a 1/4" port and M12x1.25 rod thread. AirTAC replaced this end-of-line unit with the SAU40X125STC, a direct alternative retaining the exact bore, stroke, output force, port size, and SC-series TC mounting interface.
Because the extruded aluminum body lacks external rods, it is shorter than an ISO 15552 cylinder of the same bore. The original -S magnet relied on legacy CS1-B/DS1-B switches, whereas the SAU replacement utilizes current CMSG/DMSG/EMSG sensors and introduces a SAUF built-in 4M solenoid valve option the SU line never had.
Airtac SU32~50 Standard Cylinder SU40X125STC Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X125STC |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X125STC |
| Bore size | Ø40 mm |
| Stroke | 125 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 SAU40X125STC 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 SAU40X125STC 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 SU40X125STC
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×125 | 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 SU40X125STC Is Used
Package Diverting
Deploys a TC-mounted diverter arm on a packaging line, using the 628N push force at 0.5MPa to redirect cartons efficiently at operating speeds up to 800mm/s.
Clamp Actuation
Secures medium workpieces during machining operations, taking advantage of the 125mm stroke to position clamping jaws precisely without requiring ISO 15552 bulk.
Replacing the Airtac SU32~50 Standard Cylinder SU40X125STC with the SAU40X125STC
To replace this discontinued SU40X125STC, order the SAU40X125STC, confirming the 40mm bore, 125mm stroke, 1/4" port (default PT), and TC mounting accessory are retained. If your application needs to hold a load vertically without continuous air pressure, note that a plain cylinder drifts when air is removed—the 21mm adjustable cushions only decelerate the piston near stroke end. You must add an external rod lock or pilot-operated check valve for secure holding. If sizing alternatives, the neighboring 32mm bore provides 402N push @0.5MPa, while the 50mm bore offers 982N push @0.5MPa. At 125mm stroke, side-load risks are minimal, but ensure adequate guide alignment to prevent rod bending.
Replacement checklist
- ✓ Same bore / stroke → SAU40X125STC
- ✓ 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 SU40X125STC FAQ
Yes, the AirTAC SU40X125STC is discontinued. The direct replacement is the SAU40X125STC. It matches the 40mm bore, 125mm stroke, 628N push force at 0.5MPa, 1/4" port, and SC-series TC mounting. The main upgrade is that the SAU uses current CMSG/DMSG/EMSG sensors instead of the legacy CS1-B/DS1-B switches.
This double-acting cylinder has a 1/4" air port and an M12x1.25 piston rod. It generates 628N push and 528N pull at 0.5MPa, 879N push at 0.7MPa, 1130N push at 0.9MPa, and a theoretical maximum of 128kgf at 1.0MPa. The operating speed range is 30-800mm/s.
Related AirTAC SAU Cylinders
Request a Quote for the SAU40X125STC
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X125STC replacement — usually within 7-8 hours.