Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30 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 SAIJ40BX500-30
The AirTAC SAIJ40X500-30 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 470-500mm usable travel window, allowing you to dial back the 500mm nominal stroke by up to 30mm during commissioning. Delivering 628N push force at 0.5 MPa, it uses a G1/4 PT tapered port and a 16mm rod.
This SUS304 stainless steel rod variant (code B) handles demanding environments, while the extruded aluminum barrel integrates sensor grooves on both sides. The rear adjuster acts purely as a travel stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30 |
|---|---|
| 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 SAIJ40BX500-30
| 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 SAIJ40BX500-30 Is Used
Machine Changeover
Dial in the 470-500mm travel window during product size transitions without physically replacing the actuator.
End-Stop Tuning
Fine-tune the retract position by up to 30mm at commissioning to perfect the seating of parts without external stop blocks.
Variable Diverting
Adjust the stroke endpoint on the fly for sorting or diverting different package lengths on a single conveyor line.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-30 the Right Cylinder?
Select this 40mm bore cylinder when an application requires 628N of push force at 0.5 MPa alongside flexible end-positioning. The 30mm adjustment window is ideal for product changeovers, letting you fine-tune the retract stroke without swapping cylinders or adding external stops. If your setup needs higher force, stepping up to the 50mm bore yields 982N. To replace an ISO 15552 cylinder, match the 500mm stroke, 30mm adjuster, G1/4 PT port, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interface.
Because the 500mm stroke is relatively long, the 16mm rod and M12x1.25 thread still require an external guide to prevent side-loading damage on unsupported loads. For applications requiring position holding without live air, use a SAIL or BSAI cylinder instead of relying on the rear stopper.
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 SAIJ40BX500-30 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. It can reach 1130N push force at 0.9 MPa.
The rear adjuster screw lets you shorten the 500mm nominal stroke by up to 30mm, creating a 470-500mm travel window. The adjuster acts as a mechanical stop for end-position tuning and does not function as a lock to hold the load without air pressure.
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