Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 55mm 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
- Stroke55 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10
The AirTAC SAIJ40X55-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end-of-travel position. Out of the box, the 55 mm nominal stroke can be dialed back by up to 10 mm, providing a usable travel window of 45 to 55 mm. This built-in adjustability eliminates the need to bolt on external stops or swap cylinders during machine commissioning and product changeovers.
In the 40 mm bore class, this actuator generates 879 N of push force and 528 N of pull force at 0.7 MPa. It features a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface is dimensionally interchangeable with ISO 15552 cylinders.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 55 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 SAIJ40BX55-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×55 | 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 SAIJ40BX55-10 Is Used
Machine Commissioning
Dial in the exact 45-55 mm end position during initial setup without machining external stop blocks.
Product Changeover
Quickly adapt the cylinder's travel window on packaging lines when handling slightly different product sizes.
Fixture Clamping
Provide precise, adjustable clamping force on a workpiece, tuning the retract distance to the exact part dimension.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX55-10 the Right Cylinder?
Choose this 40 mm bore adjustable-stroke cylinder when your application requires precise end-position tuning at setup without the rigidity of a fixed-stroke SAI model. If you need less force, stepping down to a 32 mm bore yields 563 N of push force at 0.7 MPa; stepping up to a 50 mm bore provides 1374 N. The rear adjusting screw acts purely as a travel stop to decelerate the load and cannot hold a load without live air pressure. For true load-holding without continuous air, consider the SAIL or BSAI series. Configuration: 40 mm bore, 55 mm stroke, 10 mm adjustment, PT ports, SUS304 rod, no magnet, and mounting options limited to 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 SAIJ40BX55-10 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 its maximum rated pressure of 1.0 MPa, it can deliver up to 1130 N of push force.
The rear adjuster screw allows you to shorten the effective stroke by up to 10 mm. This transforms the 55 mm nominal stroke into a 45-55 mm adjustable travel window, letting you set the exact end position at commissioning without replacing the cylinder.
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