Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 500mm 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
- Stroke500 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100
The AirTAC SAIJ40X500-100 is a double-acting profile cylinder with a 500 mm nominal stroke and a 100 mm rear adjustment range, yielding a usable travel window of 400 to 500 mm. It provides 628 N of push force and 528 N of pull force at 0.5 MPa. The SUS304 stainless steel rod is suited for environments where standard carbon steel rods might face corrosion risks.
This ISO 15552 dimensionally interchangeable unit features a PT G1/4 port and variable air cushions at both ends. The rear stopper screw lets you fine-tune the retract end position during commissioning without adding external stops, though it acts only as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 500 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 SAIJ40BX500-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×500 | 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 SAIJ40BX500-100 Is Used
Machine Changeover
Dial in the exact retract position within the 400-500 mm window when switching machinery to handle a new product run length or depth.
Variable End Stops
Set precise physical stops for diverter gates or sorting mechanisms that must adapt to differently sized packages on the fly.
Assembly Calibration
Fine-tune the 500 mm stroke during initial commissioning to perfect the seating pressure of a press fit without adding shims.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-100 the Right Cylinder?
Choose this 40 mm bore when an application requires moderate force (628 N push at 0.5 MPa) but demands a highly flexible end-position setup. If your process needs less force, stepping down to a 32 mm bore yields 402 N. The 100 mm adjustment window is excellent for machinery that processes varying product sizes, allowing rapid changeovers instead of physically swapping the cylinder for a shorter fixed-stroke SAI model.
Because the 500 mm stroke is substantial, an external guide rail is strongly recommended to prevent excessive side-loading on the rod and M12x1.25 rod thread. For any drop-and-hold applications requiring the load to stay secure without continuous air pressure, this cylinder is insufficient; you should specify an SAIL pneumatic lock, a BSAI clamp-lock, or an external pilot-operated check valve. To match this ISO 15552 footprint, specify: 40 mm bore, 500 mm stroke, 100 mm adjust, PT G1/4 port, Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting, and no magnet.
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 SAIJ40BX500-100 FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it can deliver up to 128 kgf.
The rear adjuster screw acts as a mechanical stop that lets you trim the effective travel back by up to 100 mm, providing a usable stroke window of 400 to 500 mm. It is a travel stop only and does not lock or hold the load without live air pressure.
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