Airtac SAID40 Double Rod Cylinder SAID40X185S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X185S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 185mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke185 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X185S
The AirTAC SAID40X185-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a built-in magnet for position sensing. Because a carbon steel rod exits both end covers, the annulus area is identical on each side. This yields perfectly symmetric performance, providing 528 N of force in both extend and retract directions at 0.5 MPa. The G1/4 PT port ensures reliable pneumatic supply.
Having a rod protrude from the rear cover allows you to mount a position flag or cam on the opposite end from the primary workpiece. This twin-rod architecture provides superior anti-rotation guidance compared to a single-rod SAI. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily install AirTAC CMSE reed or DMSE electronic switches exactly where needed.
Airtac SAID40 Double Rod Cylinder SAID40X185S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X185S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 185 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| 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, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / 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 | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID40 Double Rod Cylinder SAID40X185S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×185 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAID40 Double Rod Cylinder SAID40X185S Is Used
Symmetric Transfer
Drives a workpiece on the front rod and a synchronized secondary mechanism on the rear rod, utilizing the equal 528 N force in both directions for balanced motion.
Anti-Rotation Slides
The twin-rod geometry prevents piston rotation during travel, providing stable guidance for precision sliding fixtures without external linear bearings.
Dual-Side Sensing
Uses the integrated magnet with CMSE or DMSE switches mounted in the dual barrel grooves to track position from either side of the machine frame.
Is the Airtac SAID40 Double Rod Cylinder SAID40X185S the Right Cylinder?
Select this 40 mm bore when an application demands equal push and pull forces, specifically 528 N each way at 0.5 MPa, along with 185 mm of travel. If your project requires less force, stepping down to the 32 mm bore offers 345 N both ways, while moving up to the 50 mm bore provides 825 N. The double-rod design is ideal for twin-station actuation or driving a secondary mechanism from the rear rod. It utilizes a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR accessories.
This cylinder is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other ISO 15552 double-rod cylinders. To retain position or hold a load safely when air pressure is lost, exhausted, or the valve is centered, note that this standard cylinder will drift; you must use an external rod lock, a pilot-operated check valve, or switch to a SAIL or BSAID locking variant. Since the stroke is 185 mm, ensure the external guide supports any heavy side loads to prevent rod-bearing bending.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/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/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAID40 Double Rod Cylinder SAID40X185S FAQ
Because it is a double-rod cylinder, the effective piston area is the same on both sides. It delivers an equal force of 528 N in both extend and retract directions at 0.5 MPa, and 739 N each way at 0.7 MPa.
Yes, the SAID40X185-S is dimensionally interchangeable per ISO 15552. It shares the standard mounting interface and utilizes the same mounting accessories, making it a direct drop-in replacement for other ISO 15552 double-rod cylinders.
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