Airtac SAID40 Double Rod Cylinder SAID40X900S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X900S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 900mm 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
- Stroke900 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X900S
The AirTAC SAID40X900-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and a 900mm made-to-order stroke. Because a carbon steel rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528N of force both ways at 0.5 MPa. The integrated -S magnet enables precise position sensing with AirTAC CMSE reed or DMSE solid-state switches.
A defining advantage of the twin-rod layout is dual-side guidance and anti-rotation capability. You can mount the primary workpiece on the front rod end and a mechanical cam or position flag on the rear protrusion. This through-rod design also requires extra clearance at the back of the cylinder to accommodate the rear stroke extension.
Airtac SAID40 Double Rod Cylinder SAID40X900S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X900S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 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 SAID40X900S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×900 | 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 SAID40X900S Is Used
Symmetric Force Transfer
Drives material handling gates or indexing mechanisms where the 528N push and pull forces must remain perfectly balanced across the entire 900mm travel.
Anti-Rotation Slides
Keeps heavy vertical loads guided and prevented from twisting during long strokes, using the inherent torsional rigidity of the dual carbon steel rods.
Through-Rod Sensing
Actuates a primary clamp on the front while the rear rod end trips a DMSE solid-state sensor, verifying full stroke completion in automated assembly lines.
Is the Airtac SAID40 Double Rod Cylinder SAID40X900S the Right Cylinder?
Choose this 40mm bore when you need symmetric push and pull forces along a long 900mm stroke, which is a non-standard length exceeding the 800mm maximum standard stroke. If your application requires less force, the 32mm bore provides 345N both ways at 0.5 MPa; if you need more power, the 50mm bore offers 825N. Because the 900mm stroke is unsupported over a long distance, an external guide is strongly recommended to prevent rod-bearing bending and excessive side loading.
Select the double-rod SAID over a single-rod SAI when your mechanism demands anti-rotation stability, twin-station actuation, or rear-rod sensing. This model uses a PT G1/4 port and supports the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not hold a load. If position holding without live air pressure is required, use an external rod lock or explore the SAIL or BSAID series.
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 SAID40X900S FAQ
Because the rod occupies both sides of the piston, the effective area is equal in both directions. It delivers 528N at 0.5 MPa, 739N at 0.7 MPa, and 950N at 0.9 MPa on both extend and retract strokes.
Yes, the SAID40X900-S is dimensionally interchangeable per ISO 15552 profile cylinder standards. It serves as a drop-in replacement for other ISO 15552 double-rod cylinders, using the standard Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting interfaces.
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