This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X85, 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 SU40X85
The AirTAC Airtac SU32~50 Standard Cylinder SU40X85 is a double-acting profile-type standard cylinder with a Ø40mm bore and 85mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X85, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke85 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X85
- 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 SU40X85
The AirTAC SU40X85 is a discontinued double-acting profile-type cylinder with a 40mm bore and 85mm stroke. It delivers 628N push and 528N pull at 0.5MPa through a 1/4" port. The direct replacement is the SAU40X85, matching the bore, stroke, output force, port size and SC-series mounting.
This extruded aluminium body is more compact than an ISO 15552 cylinder of the same bore. Because this SKU lacks a magnet, it cannot accept a sensor; the SAU upgrade uses CMSG/DMSG/EMSG switches for -S variants and adds a SAUF built-in valve option.
Airtac SU32~50 Standard Cylinder SU40X85 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X85 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X85 |
| Bore size | Ø40 mm |
| Stroke | 85 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 SAU40X85 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 SAU40X85 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 SU40X85
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×85 | 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 SU40X85 Is Used
Small Part Ejection
Uses the 628N push force at 0.5MPa to reliably eject machined components from a fixture without damaging the surface.
Package Diverting
The 85mm stroke actuates a diverter arm at 30-800 mm/s to sort lightweight boxes on a packaging line.
Pallet Stop Gate
Raises and lowers a physical stop gate to control pallet flow on a roller conveyor using the 528N pull force.
Replacing the Airtac SU32~50 Standard Cylinder SU40X85 with the SAU40X85
To replace this SU40X85, order the SAU40X85 direct equivalent, keeping the 40mm bore, 85mm stroke, M12x1.25 rod thread and 1/4" port. Confirm your mounting hardware (LB/FA/FB/CA/CB) is SC-series, and note that if you ever need a magnet, the SAU uses CMSG/DMSG/EMSG sensors rather than the legacy CS1-B/DS1-B. For sizing, a 32mm bore offers 402N push at 0.5MPa, while a 50mm bore provides 982N. This non-magnetic SKU cannot take a switch. A plain cylinder drifts on air loss—the 21mm cushions only decelerate—so fit an external rod lock or pilot-operated check valve for held loads. At 85mm stroke, rod bending is minimal, but always guide the load to prevent side-load wear.
Replacement checklist
- ✓ Same bore / stroke → SAU40X85
- ✓ 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 SU40X85 FAQ
Yes, the AirTAC SU40X85 is discontinued. The direct replacement is the SAU40X85. It shares the same 40mm bore, 85mm stroke, 1/4" port, force output and SC-series mounting, so it fits the same application directly.
At 0.5MPa it provides 628N push and 528N pull; at 0.7MPa push is 879N, and the theoretical max is 128kgf at 1.0MPa. This specific SKU has no magnet and cannot accept a sensor. If sensing is required, an SAU -S variant uses CMSG/DMSG/EMSG switches.
Request a Quote for the SAU40X85
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X85 replacement — usually within 7-8 hours.