Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-50 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 SAIJ40BX500-50
The AirTAC SAIJ40X500-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 450 to 500 mm. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod and PT tapered ports. This configuration provides a robust solution for applications requiring exact end-position tuning without adding external stops.
The integrated rear screw acts purely as a travel stop to set the retraction end, meaning it does not hold the load without live air pressure. For load-holding requirements, a SAIL or BSAI series cylinder is recommended. The extruded aluminum barrel includes sensor grooves on both sides for direct DMSE electronic switch mounting, while the 500 mm stroke necessitates an external guide to support the rod against side loads.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-50 |
|---|---|
| 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 SAIJ40BX500-50
| 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 SAIJ40BX500-50 Is Used
Product Changeover
Dial in the 450-500 mm stroke window during product size transitions without swapping the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract end-position during machine commissioning to achieve exact mechanical spacing using the rear adjuster screw.
Variable End Stops
Adjust the effective travel on packaging or conveyor lines to accommodate different carton lengths on the fly.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX500-50 the Right Cylinder?
Select this 40 mm bore when a 32 mm bore (providing 402 N push at 0.5 MPa) is insufficient, but a 50 mm bore (982 N push) would be excessive. The 50 mm adjustment range is chosen over a fixed SAI cylinder when a machine setup requires variable end-stops for product changeovers. Because this is a 500 mm stroke, an external guide is required to manage side loads. It is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and 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 SAIJ40BX500-50 FAQ
It delivers 628 N push and 528 N pull force at 0.5 MPa, reaching up to 1130 N push at 0.9 MPa. The operational speed range is 30-800 mm/s.
A rear stopper screw lets you mechanically shorten the 500 mm nominal stroke by up to 50 mm, providing a usable 450-500 mm travel window. The adjuster acts only as a travel stop and does not lock the load without air pressure.
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