Airtac SAID40 Double Rod Cylinder SAID40X850
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X850 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 850mm 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
- Stroke850 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X850
The AirTAC SAID40X850 is a double-acting, double-rod ISO 15552 profile cylinder engineered for symmetric force delivery. Because the twin rods occupy both sides of the piston, the annulus area is identical in each direction, yielding an equal extend and retract thrust of 528 N at 0.5 MPa. This through-rod architecture allows you to mount the primary workpiece on the front end and a position flag or cam on the rear.
Featuring a 16mm carbon steel rod and a PT G1/4 port, this extruded aluminum body includes integrated sensor grooves on both sides for flexible switch placement. The variable air cushions at both ends decelerate the piston smoothly, while the standard carbon steel rod material provides robust durability for industrial transfer operations.
Airtac SAID40 Double Rod Cylinder SAID40X850 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X850 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 850 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 SAID40X850
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×850 | 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 SAID40X850 Is Used
Symmetric Transfer
Drives a dual-sided transfer carriage where the rear rod simultaneously actuates a secondary release mechanism, maintaining equal speed and force in both directions.
Anti-Rotation Slide
Guides a heavy vertical lift gate with high torsional stability, using the twin-rod geometry to prevent binding across the 850mm travel.
Through-Rod Sensing
Actuates a clamping fixture on the front stroke while the protruding rear rod end triggers an external limit switch for precise end-of-cycle confirmation.
Is the Airtac SAID40 Double Rod Cylinder SAID40X850 the Right Cylinder?
Selecting the SAID40X850 is optimal when your mechanism requires equal push and pull forces alongside anti-rotation guidance. If your application demands less thrust, stepping down to the 32mm bore provides 345 N both ways; conversely, upgrading to the 50mm bore yields 825 N. This model uses a reduced ISO 15552 mounting accessory set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets found on single-rod variants.
Because this stroke measures 850 mm, the extended 16mm rod requires external guidance to prevent rod-bearing bending under heavy side loads. Note that a plain SAID does not hold its position when air pressure is lost; for dead-load holding, consider the SAIL lock or BSAID clamp-lock series. As a dimensionally interchangeable ISO 15552 profile cylinder, it serves as a drop-in replacement for other standard double-rod actuators.
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 SAID40X850 FAQ
The SAID40X850 provides equal force in both extend and retract directions due to its double-rod design. It delivers 528 N at 0.5 MPa, 739 N at 0.7 MPa, and 950 N at 0.9 MPa.
Yes, the SAID40X850 is dimensionally interchangeable per ISO 15552 mounting dimensions. It serves as a drop-in replacement for other ISO 15552 profile-type double-rod cylinders, utilizing a standard PT G1/4 port.
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