Airtac SAID40 Double Rod Cylinder SAID40X85S
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40X85S 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 SAID40X85S
The AirTAC SAID40X85-S is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 85mm stroke. Because the piston rod exits both end covers, the annulus area is identical in both directions, yielding a perfectly symmetric 528N output at 0.5MPa. This makes it ideal for mechanisms requiring equal push and pull dynamics.
Equipped with a magnet (-S), it supports AirTAC CMSE reed and DMSE solid-state sensors housed in the dual-side barrel grooves. The carbon steel rod and PT tapered port threads provide robust, leak-free operation, while the rear rod end offers an excellent mounting point for a cam, position flag, or secondary tool.
Airtac SAID40 Double Rod Cylinder SAID40X85S Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40X85S |
|---|---|
| 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 SAID40X85S
| 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 SAID40X85S Is Used
Symmetric Transfer
Drives transfer arms with identical push and pull velocity and 528N of force, ensuring perfectly balanced part movement without rotational skew.
Twin-Station Actuation
Mounts the primary workpiece on the front rod and a secondary mechanism or position flag on the rear rod to operate dual stations simultaneously.
Anti-Rotation Slides
Uses the through-rod geometry to guide loads against rotation, preventing binding in precision sliding and clamping jigs.
Is the Airtac SAID40 Double Rod Cylinder SAID40X85S the Right Cylinder?
Choose this 40mm bore when your mechanism demands equal extend and retract forces alongside anti-rotation guidance that a single-rod SAI cannot provide. If your application needs less force, the 32mm bore offers 345N both ways; if you need more, step up to the 50mm bore for 825N. Remember that a plain SAID cylinder relies on air pressure to maintain position; it will drift if supply is lost, so consider an external rod lock or a BSAID clamp-lock for critical holding.
This model is dimensionally interchangeable per ISO 15552, serving as a drop-in replacement for other standard double-rod profile cylinders. It uses the reduced SAID mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits the FB, CA, CB, and CR variants found on single-rod versions.
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 SAID40X85S FAQ
It provides 528N of force at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa. Because it is a double-rod cylinder, these pull-side values are identical for both the extend and retract strokes.
Yes, it is dimensionally interchangeable per ISO 15552. However, it uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and does not support the FB, CA, CB, or CR brackets.
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