This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X850, 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 SU40X850
The AirTAC Airtac SU32~50 Standard Cylinder SU40X850 is a double-acting profile-type standard cylinder with a Ø40mm bore and 850mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X850, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke850 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X850
- 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 SU40X850
The AirTAC SU40X850 is a discontinued double-acting profile-type cylinder with a 40mm bore and 850mm stroke. It delivers 628N push and 528N pull at 0.5MPa, utilizing a 1/4" port. AirTAC replaced this end-of-line unit with the SAU40X850, a direct upgrade retaining the exact bore, stroke, force, port, and SC-series mounting.
Because this 850mm stroke exceeds the 1200mm standard maximum threshold classification for nonstandard sizing, it requires careful alignment. The SAU upgrade introduces current CMSG/DMSG/EMSG sensors and a SAUF built-in-valve option the SU lacked.
Airtac SU32~50 Standard Cylinder SU40X850 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X850 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X850 |
| Bore size | Ø40 mm |
| Stroke | 850 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 SAU40X850 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 SAU40X850 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 SU40X850
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×850 | 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 SU40X850 Is Used
Extended Transfer Push
Pushes products between conveyor sections over an 850mm gap using 628N force at 0.5MPa, requiring external guides to prevent rod bending.
Long-Reach Ejection
Ejects machined parts from a deep work zone, leveraging the compact profile body to save space compared to older ISO 15552 units.
Replacing the Airtac SU32~50 Standard Cylinder SU40X850 with the SAU40X850
To replace the SU40X850, order the SAU40X850 direct equivalent, confirming the 40mm bore, 850mm stroke, 1/4" port, and M12x1.25 rod thread. Since this is a no-magnet SKU, it cannot accept a sensor; if sensing is needed, specify an SAU-S model and upgrade to CMSG/DMSG/EMSG switches (the SU used legacy CS1-B/DS1-B). For loads needing 879N at 0.7MPa, step up to a 50mm bore; for lighter tasks, a 32mm bore offers 402N. The 850mm stroke demands external guides to prevent rod bending under side loads. Note that a plain cylinder drifts on air loss—the cushion only decelerates—so use a rod lock or pilot check valve for load holding. The SAUF valve-integrated variant is available if needed.
Replacement checklist
- ✓ Same bore / stroke → SAU40X850
- ✓ 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 SU40X850 FAQ
Yes, the AirTAC SU40X850 is discontinued. The direct replacement is the SAU40X850. It shares the identical 40mm bore, 850mm stroke, 628N force, 1/4" port, 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 at 0.7MPa, and a 128kgf maximum at 1.0MPa. This specific SKU lacks a magnet (-S) and cannot take a sensor; the SAU replacement with -S uses CMSG/DMSG/EMSG switches instead of the legacy CS1-B/DS1-B.
Request a Quote for the SAU40X850
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X850 replacement — usually within 7-8 hours.