Airtac SAID40 Double Rod Cylinder SAID40X290
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X290 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 290mm 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
- Stroke290 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X290
The AirTAC SAID40X290 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40 mm bore and 290 mm stroke. A single piston drives a carbon steel rod out of both end covers, ensuring the effective annulus area is identical on extend and retract. This geometry yields an equal push and pull force of 528 N at 0.5 MPa (739 N at 0.7 MPa) in either direction.
Because the rod protrudes from the rear, you can mount a position flag or secondary cam opposite the primary workpiece, taking advantage of the dual-side guidance to prevent rotation. The extruded aluminum barrel integrates sensor grooves on both sides for CMSE reed or DMSE solid-state switches, though this non-magnetized unit requires a separate -S variant for piston sensing.
Airtac SAID40 Double Rod Cylinder SAID40X290 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X290 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 290 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 SAID40X290
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×290 | 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 SAID40X290 Is Used
Symmetric Force Transfer
Drives an identical 528 N load both on extend and retract to push and pull a workpiece through a processing station without force imbalance.
Anti-Rotation Slides
Uses the twin carbon steel rods exiting both end covers to guide a heavy sliding carriage, preventing rotational twist over the 290 mm travel.
Rear-Side Cam Actuation
Mounts a secondary cam or position flag on the rear rod end to trigger external limit switches while the front rod performs the primary work.
Is the Airtac SAID40 Double Rod Cylinder SAID40X290 the Right Cylinder?
Choose this 40 mm bore when a 32 mm version (345 N both ways at 0.5 MPa) lacks the thrust for your twin-station mechanism, but a 50 mm bore (825 N) is physically oversized. The double-rod design is selected over a single-rod SAI when strict anti-rotation guidance or rear-side sensing is mandatory. The PT tapered porting matches the standard G1/4 interface. Mounting options include the reduced SAID set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
At a 290 mm stroke, the unsupported carbon steel rod and M12x1.25 thread face increased side-load risks and rod-bearing bending. Implement an external guide rail to prevent premature wear. Note that the adjustable air cushions at both ends only decelerate the piston near stroke end; a plain SAID will drift if air pressure is lost. Use a SAIL or BSAID lock cylinder if the mechanism must hold a load without live pressure.
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 SAID40X290 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, extend and retract forces are equal. It provides 528 N both ways at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X290 is dimensionally interchangeable per ISO 15552 profile cylinder standards. It serves as a drop-in replacement for other ISO 15552 double-rod cylinders matching the 40 mm bore, 290 mm stroke, and G1/4 port size.
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