Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30S 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 SAIJ40BX500-30S
The AirTAC SAIJ40X500-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to fine-tune the effective travel down to a 470-500 mm window. Delivering 879 N of push force at 0.7 MPa, it fits mid-range automation tasks perfectly. The barrel features dual sensor grooves ready for CMSE reed and DMSE electronic switches.
This SKU ships with a SUS304 stainless steel rod for superior corrosion resistance and utilizes PT tapered port threads. The rear adjuster acts purely as a mechanical stop to dial in the end position during commissioning; it does not hold the load without live air. For load-holding without pressure, consider the SAIL or BSAI series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30S |
|---|---|
| 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 SAIJ40BX500-30S
| 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 SAIJ40BX500-30S Is Used
Variable End-Stop Tuning
Dial in the retract position within the 470-500 mm window during machine commissioning to perfectly align packaging folds without swapping hardware.
Product Size Changeover
Quickly adapt a conveyor sorting arm to handle different package lengths by adjusting the rear stopper screw on the fly.
Long-Stroke Positioning
Use the 500 mm travel to push a machining fixture into place, relying on the built-in stop to set the exact final coordinate.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30S the Right Cylinder?
Choose this 40 mm bore when you need precise variable end-stops over a long 500 mm travel without adding external stops. If your application requires less force, stepping down to a 32 mm bore yields 563 N of push force at 0.7 MPa. Conversely, a 50 mm bore provides 1374 N for heavier payloads. Because this cylinder has a 500 mm stroke, the 16 mm rod should be guided externally to prevent excessive side-loading and premature seal wear.
An adjustable stroke is selected over a fixed SAI cylinder when product changeovers require shifting the retract position. This model is dimensionally interchangeable per ISO 15552 and includes a magnet for sensors, PT ports, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2).
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 SAIJ40BX500-30S FAQ
At a 0.7 MPa operating pressure, this 40 mm bore cylinder generates 879 N of push force and 528 N of pull force. It can reach a maximum of 1130 N push at 0.9 MPa.
The rear adjuster screw lets you mechanically shorten the 500 mm nominal stroke by up to 30 mm, creating a 470-500 mm usable travel window. It functions as a physical stop for end-position tuning and does not lock the load without live air pressure.
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