Airtac SAUD Double Rod Cylinder SAUD40X70S
The AirTAC Airtac SAUD Double Rod Cylinder SAUD40X70S is a genuine double-acting profile-type standard air cylinder with a Ø40mm bore and 70mm 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
- Stroke70 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 SAUD40X70S
The AirTAC SAUD40X70S is a double-acting profile-type cylinder featuring a 40mm bore and 70mm stroke. Because a rod exits both ends, the push and pull output is identical at 528 N each way at 0.5 MPa. The extruded aluminum barrel keeps the total length shorter than a standard ISO 15552 unit of the same size.
This unit includes the -S magnet option for CMSG, DMSG or EMSG switches. With a 1/4" port and M12x1.25 rod thread, it operates at 30-800 mm/s. For sizing, the safe working load is roughly 317 N, and vertical lift capacity is about 27 kg with a 2:1 margin.
Airtac SAUD Double Rod Cylinder SAUD40X70S Technical Specifications
| Model | Airtac SAUD Double Rod Cylinder SAUD40X70S |
|---|---|
| Series | SAU profile-type cylinder |
| Bore size | Ø40 mm |
| Stroke | 70 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 SAUD40X70S
| SAU | Profile-type standard cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×70 | 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 SAUD40X70S Is Used
Twin Tool Drive
Drives two opposing forming tools simultaneously with equal 528 N force, keeping cycle times synchronized without requiring a second actuator.
Non-Rotating Gauge
Powers a precision gauging head where the dual rods prevent mechanical twist, ensuring the measurement probe contacts the part flatly.
Cam Trip Sensing
Uses the protruding back rod as a mechanical cam to physically trigger an external limit switch at mid-stroke for early confirmation.
Is the Airtac SAUD Double Rod Cylinder SAUD40X70S the Right Cylinder?
Choose this 40mm bore (528 N both ways) over the smaller 32mm bore (345 N) when you need extra thrust, or step up to the 50mm bore (825 N) for heavier tooling. A double-rod design is ideal when you need anti-rotation guidance, want to drive two tools at once, or need a back rod to trip a switch. Mounting fits AirTAC SC series FA and LB brackets. The -S suffix enables sensor use. For this 70mm stroke, side loads are minimal, but always guide the load externally on longer strokes. Note that air cushions only decelerate the piston; use an external rod lock or pilot check valve to hold a load securely without live air.
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 SAUD40X70S FAQ
The force is equal in both directions because it is a double-rod design. It provides 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa. The 1/4" port supplies air to both chambers equally.
No, a plain double-rod cylinder drifts without live air. The adjustable 21mm cushions only decelerate the piston near the end of stroke. To hold a load safely, install an external rod lock or a pilot-operated check valve.
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