Airtac SAID40 Double Rod Cylinder SAID40X85
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X85 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40X85
The AirTAC SAID40X85 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 85mm stroke. Because a carbon steel rod exits both end covers, the annulus area is identical on extend and retract, yielding exactly 528N of force each way at 0.5 MPa. This symmetric output is perfect for twin-station actuation where push and pull demands match.
The rear rod extension allows you to mount a cam or position flag for external tracking without interfering with the primary workpiece. The extruded aluminum barrel includes sensor grooves on both sides, though this specific unit lacks the -S magnet, requiring external limit switches rather than embedded CMSE or DMSE sensors.
Airtac SAID40 Double Rod Cylinder SAID40X85 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X85 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 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 SAID40X85
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×85 | 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 SAID40X85 Is Used
Symmetric Transfer
Drives a workpiece forward and back with identical 528N force, ensuring consistent clamping pressure in both travel directions.
Anti-Rotation Slides
The twin-rod geometry resists torsional twisting better than a single piston, keeping linear slides perfectly aligned under offset loads.
Rear-Cam Actuation
The protruding rear rod end mechanically trips a sequence valve or external limit switch while the front rod executes the primary work.
Is the Airtac SAID40 Double Rod Cylinder SAID40X85 the Right Cylinder?
Select this 40mm bore when an application requires equal push/pull dynamics and anti-rotation guidance that a single-rod SAI cannot provide. If your project demands less force, the 32mm bore offers 345N both ways at 0.5 MPa; stepping up to the 50mm bore provides 825N. The PT tapered porting ensures a tight pneumatic seal.
This model uses a reduced mounting accessory set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR brackets. Note that the adjustable air cushions only decelerate the piston near stroke end; they do not lock the load. If air pressure drops, the cylinder will drift, requiring an external pilot-operated check valve for position holding.
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 SAID40X85 FAQ
Because it is a double-rod cylinder, the effective piston area is identical on both sides. It generates 528N of force in both extend and retract directions at 0.5 MPa, and 739N at 0.7 MPa.
It is dimensionally interchangeable with ISO 15552 cylinders, but SAID uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. It does not support FB, CA, CB, or CR brackets found on single-rod versions.
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