Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75
The AirTAC SAIJ40X800-75 is a double-acting ISO 15552 profile cylinder engineered with a rear stroke adjuster, allowing you to dial back the nominal 800 mm travel by up to 75 mm. This creates a 725-800 mm usable end-position window, giving you the flexibility to fine-tune machine stops during commissioning without swapping out hardware. It delivers a robust 879 N of push force at 0.7 MPa, paired with a SUS304 stainless steel rod for superior corrosion resistance.
Because the stroke reaches 800 mm, the 16 mm diameter rod and M12x1.25 thread will still experience leverage forces if the load is unsupported; an external guide is recommended to prevent side-loading damage. The rear adjuster acts purely as a travel stop for deceleration alongside the standard air cushions, and it will not hold the load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 800 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 SAIJ40 Adjustable Cylinder SAIJ40BX800-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×800 | 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 SAIJ40 Adjustable Cylinder SAIJ40BX800-75 Is Used
Variable End-Stop Tuning
Dial in the exact retract distance between 725 and 800 mm during machine setup, allowing precise positioning without machining new hard stops.
Product Size Changeover
Quickly adapt a packaging line to different carton lengths by adjusting the rear stopper, minimizing downtime between production runs.
Long-Stroke Assembly Pressing
Apply up to 879 N of force at 0.7 MPa over an extended travel distance, using the rear stopper to prevent over-travel on delicate components.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75 the Right Cylinder?
Choose this 40 mm bore when an application requires moderate thrust—stepping up to a 50 mm bore yields 1374 N at 0.7 MPa, while dropping to a 32 mm bore provides only 563 N. The adjustable stroke is ideal for production lines handling varying product sizes, letting operators change the retract end-stop on the fly instead of adding external stops or buying a fixed-stroke SAI cylinder.
To match this exact ISO 15552 footprint for a direct replacement, verify the 800 mm stroke, 75 mm adjustment range, PT tapered port threads, and the standard mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). For load-holding without live air pressure, this cylinder is insufficient; consider an AirTAC SAIL or BSAI variant instead.
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 SAIJ40 Adjustable Cylinder SAIJ40BX800-75 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. At a maximum pressure of 1.0 MPa, it can deliver up to 128 kgf.
The rear adjuster screw lets you shorten the effective travel from the nominal 800 mm by up to 75 mm, creating a 725-800 mm usable window. It functions as a mechanical stop to set the end position and does not lock the load without live air pressure.
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