Airtac SAI40 Standard Air Cylinder SAI40AX850S
The AirTAC SAI40 Standard Air Cylinder SAI40AX850S 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 interchangeable with other ISO 15552 cylinders at the mounting interface.
- BoreØ40 mm
- Stroke850 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAI40 Standard Air Cylinder SAI40AX850S
The AirTAC SAI40X850-S is a double-acting ISO 15552 profile cylinder featuring a 40mm bore and an 850mm stroke. Because this stroke exceeds the standard 1200mm maximum for this bore, it is manufactured as a non-standard, made-to-order item. It generates 879N of push force and 528N of pull force at 0.7 MPa, making it well-suited for long-travel material handling. The extruded aluminum barrel omits tie-rods for a clean exterior.
This specific unit includes a magnet (-S) for use with CMSE and DMSE series reed switches, fitting neatly into the dual sensor grooves machined into both sides of the barrel. It is equipped with a SUS420J2 stainless steel piston rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The fluid port utilizes a PT tapered thread, and adjustable air cushions at both ends manage piston deceleration over the extended travel distance.
Airtac SAI40 Standard Air Cylinder SAI40AX850S Technical Specifications
| Model | Airtac SAI40 Standard Air Cylinder SAI40AX850S |
|---|---|
| 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 SAI40 Standard Air Cylinder SAI40AX850S
| 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 SAI40 Standard Air Cylinder SAI40AX850S Is Used
Long-Travel Conveying
Drives diverters and pushers across wide conveyor belts where the 850mm stroke is required to reach across multiple product lanes.
Material Extrusion
Provides consistent 879N of push force at 0.7 MPa for long-stroke ejection of molded parts from machinery beds.
Pallet Positioning
Indexes pallets or heavy totes over extended distances in high-bay storage retrieval systems.
Is the Airtac SAI40 Standard Air Cylinder SAI40AX850S the Right Cylinder?
Stepping up to the 50mm bore yields 1374N of push force at 0.5 MPa, which is necessary if the 40mm bore's 879N at 0.7 MPa is insufficient for moving your payload. Conversely, dropping to a 32mm bore provides 563N at 0.7 MPa for lighter duty.
Because the 850mm stroke creates a long unsupported rod extension, applying any side load will cause severe bending stress on the rod bearing and seal. For this made-to-order length, you must use an external guide rail or a dedicated guided cylinder to prevent premature wear. Additionally, this standard double-acting cylinder relies on live air pressure to hold position; if a fail-safe drop prevention is required under pressure loss, select the SAIL or BSAI locking variants. As a dimensionally interchangeable ISO 15552 profile cylinder, it serves as a direct replacement for other ISO 15552 cylinders matching the 40mm bore, 850mm stroke, PT G1/4 port, and FA/FB flange or LB foot mounting accessories.
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 SAI40 Standard Air Cylinder SAI40AX850S FAQ
At an operating pressure of 0.7 MPa, this 40mm bore cylinder provides 879N of push force and 528N of pull force.
Yes, the SAI40X850-S is dimensionally interchangeable per ISO 15552, meaning it matches the mounting interface and center distances of other standard profile cylinders, but it is not identical to any specific brand's proprietary part.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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