This model is discontinued
AirTAC has phased out the SU series. You can still order this code here: we ship the direct replacement SAU40X20, 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 SU40X20
The AirTAC SU32~50 Standard Cylinder SU40X20 is a double-acting profile-type standard cylinder with a Ø40mm bore and 20mm stroke, 1/4" air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAU40X20, which matches its bore, stroke, force and mounting.
- BoreØ40 mm
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- StatusDiscontinued → SAU40X20
- 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 SU40X20
The AirTAC SU40X20 is a discontinued double-acting profile cylinder with a 40mm bore and 20mm stroke. Delivering 628N push force at 0.5MPa, its direct replacement is the SAU40X20, matching the 1/4" port, M12x1.25 rod thread, and SC-series mounts.
The SAU upgrade retains the compact extruded aluminium body but introduces CMSG/DMSG/EMSG sensors (replacing the SU's CS1-B/DS1-B) and adds an optional SAUF built-in 4M valve. This non-magnetic SKU cannot take a switch.
Airtac SU32~50 Standard Cylinder SU40X20 Technical Specifications
| Model | Airtac SU32~50 Standard Cylinder SU40X20 |
|---|---|
| Series | SU profile-type cylinder (discontinued) |
| Replacement | SAU40X20 |
| Bore size | Ø40 mm |
| Stroke | 20 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 SAU40X20 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 SAU40X20 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 SU40X20
| SU | Profile-type standard cylinder (discontinued). |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 SU40X20 Is Used
Short-Stroke Clamping
Ideal for securing light components during machining, using the 628N push force at 0.5MPa to hold parts firmly in automated fixtures.
Package Diverting
Provides rapid 20mm actuation to push small cartons off a main conveyor line, leveraging the 30-800mm/s speed range for high throughput.
Bin Ejection
Delivers a quick, compact punch to eject selected items from storage bins, fitting neatly into tight material handling stations.
Replacing the Airtac SU32~50 Standard Cylinder SU40X20 with the SAU40X20
To replace this SU40X20, order the SAU40X20. Confirm the 1/4" port, PT/G/NPT thread choice, and SC-series mounting (LB/FA/FB/CA/CB). Because this SKU lacks a magnet (-S), it cannot accept a sensor; if sensing is needed, order the SAU40X20S and note the switch family changes to CMSG/DMSG/EMSG. For higher loads, the 50mm bore offers 982N [email protected]; for tighter spaces, the 32mm bore provides 402N. The 20mm stroke keeps the assembly very compact. As a double-acting cylinder, it will not hold a load without live air—the 21mm cushions only decelerate; use an external rod lock for static holding. The SAUF variant integrates a valve if you need faster local actuation.
Replacement checklist
- ✓ Same bore / stroke → SAU40X20
- ✓ 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 SU40X20 FAQ
Yes, the SU40X20 is discontinued. The direct replacement is the AirTAC SAU40X20. It features the same 40mm bore, 20mm stroke, 628N force, 1/4" port, and SC-series mounting accessories, fitting the exact same application.
At 0.5MPa it provides 628N push and 528N pull force, reaching 879N at 0.7MPa and a theoretical max of 128kgf at 1.0MPa. This specific SKU has no magnet and cannot accept a sensor; the SAU replacement uses CMSG/DMSG/EMSG switches on its -S variants.
Request a Quote for the SAU40X20
Send us the quantity and destination. We confirm price, stock and lead time on the SAU40X20 replacement — usually within 7-8 hours.