The AirTAC Airtac SAU Standard Cylinders SAU63X420S is a genuine double-acting profile-type standard air cylinder with a Ø63mm bore and 420mm stroke, 3/8" air ports and adjustable end cushioning. Its hard-anodized aluminum-profile barrel is shorter than an ISO 15552 cylinder of the same bore, and it shares SC-series mounting accessories.
The SAU63X420S is a double-acting profile-type cylinder with a 63 mm bore and 420 mm stroke. Its extruded aluminium barrel carries no external tie hardware and is built shorter than an ISO 15552 cylinder of the same bore, so it slots into machines where every millimetre of length counts. At 0.5 MPa it delivers 1559 N on extension, and the 3/8" air port (PT thread as standard) feeds a speed range of 30-800 mm/s with 21 mm adjustable cushions at each end to soften travel near both stroke ends.
The trailing S in the model code means a piston magnet is built in, so CMSG, DMSG or EMSG switches can clip straight into the profile groove for end-of-stroke or mid-position sensing. For sizing, plan on roughly 935 N of real working force at 0.5 MPa (about 60% of the rated 1559 N, allowing for seal friction and smooth travel) - or think of it as lifting about 79 kg vertically with a 2:1 margin. If your process runs hot, the Viton H seal option extends the temperature window from the standard -20 to +70 C up to 0-150 C.
| Model | Airtac SAU Standard Cylinders SAU63X420S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø63 mm |
| Stroke | 420 mm |
| Acting type | Double acting |
| Port size | 3/8" |
| Rod thread | M16×1.5 |
| 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 stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAU series datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G (BSPP). A high-temperature seal (0-150 °C) is available.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
| SAU | Profile-type standard cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×420 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAU-family variants: SAUD (double rod), SAUJ (adjustable stroke), SAUF (with built-in solenoid valve), and SAU-S with built-in magnet. Seals: TPU (blank) / Viton H / NBR N. Sensor switches: CMSG / DMSG / EMSG.
Raises jigs or machined housings between stations with a 2:1 margin - the 1559 N push at 0.5 MPa supports about 79 kg of vertical lift, and the -S magnet confirms top-of-stroke position to the PLC.
Clamps aluminium castings in machining fixtures with roughly 935 N of dependable working force at 0.5 MPa; the compact profile keeps the clamp body clear of tooling paths.
Pushes cartons or totes off a transfer conveyor at 420 mm travel; 21 mm end cushions stop the pusher gently at 30-800 mm/s cycle speeds.
Compare neighbours before committing: the 40 mm bore pushes 879 N at 0.5 MPa and suits lighter clamping, while stepping up to the 80 mm bore raises push force to 2513 N - the 63 mm sits between them at 1559 N, a common choice for mid-weight press and lift duties. At 420 mm of stroke, keep side loads off the 20 mm rod: guide the load externally or add a guide unit, because long strokes amplify rod bending. Mounting uses the AirTAC SC-series accessory set - LB foot, FA or FB flange, CA or CB clevis - plus I, Y, F or U rod knuckles. One caution: when air is lost or the valve centres, the piston will drift, since the cushion only decelerates near stroke end and holds nothing; add an external rod lock or a pilot-operated check valve if the load must stay put.
Quick checklist
At 0.5 MPa it pushes 1559 N and pulls 1402 N. At 0.7 MPa push force rises to 2182 N, and at 0.9 MPa it reaches 2805 N. The theoretical maximum is 318 kgf at 1.0 MPa. Operating pressure spans 0.15-1.0 MPa with a 1.5 MPa proof pressure, and speed runs 30-800 mm/s with 21 mm adjustable cushions at both ends.
The S suffix means a piston magnet is fitted, letting CMSG, DMSG or EMSG switches (reed or electronic) seat directly in the profile groove for position feedback. Mechanically it mounts with the AirTAC SC-series range - LB foot, FA/FB flange, CA/CB clevis - and the shorter-than-ISO-15552 body frees length in tight frames.
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