Airtac SAUD Double Rod Cylinder SAUD40X20S
The AirTAC Airtac SAUD Double Rod Cylinder SAUD40X20S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 20mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke20 mm
- Port size1/4"
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
- 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 SAUD Double Rod Cylinder SAUD40X20S
The AirTAC SAUD40X20S is a double-acting, double-rod profile cylinder. A 16 mm rod exits both ends of the hard-anodized aluminum barrel, meaning both faces use the rod-side piston area. The push and pull output is therefore identical, delivering 528 N each way at 0.5 MPa. The 1/4 inch port supplies air to drive the 20 mm stroke at 30-800 mm/s.
Because the extruded profile barrel lacks external spanning rods, this unit is noticeably shorter than a standard ISO 15552 cylinder of the same 40 mm bore. The -S suffix indicates a built-in piston magnet, allowing you to mount CMSG, DMSG or EMSG switches directly onto the body for position sensing. For sizing, the 528 N output at 0.5 MPa yields a safe working load of roughly 317 N, which translates to a vertical lift capacity of about 27 kg with a 2:1 safety margin. A Viton H seal option can extend the operating range up to 150 C.
Airtac SAUD Double Rod Cylinder SAUD40X20S Technical Specifications
| Model | Airtac SAUD Double Rod Cylinder SAUD40X20S |
|---|---|
| Series | SAU profile-type cylinder |
| 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 stroke | Up to 1200 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.
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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAUD Double Rod Cylinder SAUD40X20S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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.
Where the Airtac SAUD Double Rod Cylinder SAUD40X20S Is Used
Synchronized Gripper Jaws
Drives two opposing tooling fingers simultaneously from a single piston, ensuring perfectly matched closing and opening force for delicate component handling.
Edge Guide Alignment
Uses the twin-rod anti-twist geometry to push a web edge guide straight without lateral rotation, maintaining film or paper tracking during continuous feed.
Cam-Triggered Cutoff
The protruding back rod serves as a mechanical cam, tripping an external limit switch to fire a blade exactly when the main stroke reaches its midpoint.
Is the Airtac SAUD Double Rod Cylinder SAUD40X20S the Right Cylinder?
Choose this 40 mm bore when your mechanism requires equal push and pull thrust, anti-rotation stability, or a back rod to trip a sensor cam. If you need less force, the 32 mm bore offers 345 N both ways; if you need more, the 50 mm bore provides 825 N both ways. Mounting is limited to Basic, FA flange, and LB foot styles, matching the AirTAC SC series footprint. The -S magnet equips the cylinder for electronic or reed sensing. For this 20 mm stroke, side loads are minimal, but any application exceeding 300 mm of travel should incorporate an external guide to prevent rod binding.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB — same as SC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAUD Double Rod Cylinder SAUD40X20S FAQ
Because the 16 mm rod exits both ends, the force is equal in both directions. It generates 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The 1/4 inch port feeds both chambers to achieve this balanced output.
No. The adjustable 21 mm air cushions only decelerate the piston near the stroke ends; they do not lock the position. If air is lost or the valve is centered, the load will drift. Use an external pilot-operated check valve or a rod lock for secure holding.
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