Airtac SAID40 Double Rod Cylinder SAID40X275S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X275S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 275mm 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
- Stroke275 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X275S
The AirTAC SAID40X275-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 275mm stroke. Because a carbon steel rod exits both end covers, the annulus area is identical on extension and retraction, yielding an equal bidirectional force of 528N at 0.5 MPa. The integrated -S magnet enables position detection using AirTAC CMSE reed and DMSE solid-state switches along the dual sensor grooves.
This through-rod design provides superior anti-rotation guidance compared to a single-rod SAI, allowing you to mount a primary workpiece on one end and a cam or limit flag on the rear. It operates at speeds of 30-800 mm/s and uses PT tapered G1/4 ports.
Airtac SAID40 Double Rod Cylinder SAID40X275S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X275S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 275 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 SAID40X275S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×275 | 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 SAID40X275S Is Used
Symmetric Force Transfer
Ideal for shuttling parts between two stations where the 528N push and pull forces must be exactly matched to prevent mechanical binding.
Anti-Rotation Slides
The twin through-rods prevent piston rotation, providing precise linear guidance for machining or clamping fixtures without external guides.
Dual-End Actuation
Mount the primary tool on the front rod and a position flag or secondary cam on the rear rod to trigger CMSE/DMSE sensors from the opposite side.
Is the Airtac SAID40 Double Rod Cylinder SAID40X275S the Right Cylinder?
Select this 40mm bore when an application requires perfectly symmetric force and speed, offering 528N both ways at 0.5 MPa. If your mechanism needs less force, stepping down to the 32mm bore yields 345N; if you need more clamping or transfer power, the 50mm bore provides 825N. The twin-rod architecture is chosen over a single-rod cylinder when dual-side guidance or rear-end actuation is required. Note that this cylinder does not hold a load if air pressure drops; for fail-safe holding, consider an external rod lock or the BSAID clamp-lock variant.
At 275mm stroke, the unsupported rod length is considerable. Even with a robust 16mm rod and M12x1.25 thread, long strokes generate bending moments on the rod bearing under side loads. Utilize an external guide rail to prevent premature wear. Mounting options include the SAID-specific set of Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets, dimensionally interchangeable per ISO 15552.
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 SAID40X275S FAQ
Because the double-rod design subtracts the rod area on both sides, the extend and retract forces are equal. It outputs 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa in both directions.
Yes, the SAID profile cylinder is dimensionally interchangeable per ISO 15552. It uses the standard mounting interface and PT G1/4 ports, but note it uses the SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets.
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