Airtac SAIJ40 Adjustable Cylinder SAIJ40BX130-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX130-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 130mm 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
- Stroke130 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX130-50
The AirTAC SAIJ40X130-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to fine-tune the retract end-position. With a 130 mm nominal stroke and a 50 mm adjustment range, it provides a usable travel window of 80 to 130 mm. This bore size delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it well-suited for moderate load positioning tasks.
Built with a SUS304 stainless steel rod for superior corrosion resistance, this model uses a PT tapered port thread (G1/4) and includes variable air cushions at both ends to decelerate the moving load. The rear adjuster functions strictly as a mechanical stop to set the travel limit; it does not lock or hold the load without continuous live air pressure. For load-holding requirements, consider an external pilot-operated check valve or the AirTAC SAIL series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX130-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX130-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 130 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 SAIJ40BX130-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×130 | 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 SAIJ40BX130-50 Is Used
Machine Changeover
Dial in the 80 to 130 mm stroke window during product size changeovers to set new retract positions without replacing the cylinder.
End-Position Tuning
Fine-tune the exact end-of-stroke stop during initial commissioning to perfect the mechanical timing of your assembly process.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in packaging or food-grade lines where moisture is present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX130-50 the Right Cylinder?
Selecting this adjustable-stroke cylinder is ideal when your machine setup requires variable end-stops or frequent product-size changeovers without physically swapping out the actuator. Instead of adding external stops to a fixed-stroke SAI cylinder, the SAIJ40X130-50 lets you dial in the exact 80 to 130 mm travel distance during commissioning. If your application requires less force, stepping down to a 32 mm bore provides 402 N of push force at 0.5 MPa; if you need more clamping power, stepping up to a 50 mm bore yields 982 N.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 130 mm stroke, PT port thread, and the specific 50 mm adjustment code. Because the nominal stroke is 130 mm, side-load stress is manageable, but always ensure the M12x1.25 rod thread is properly aligned with your load coupling. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR mounts.
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 SAIJ40BX130-50 FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the effective travel from the 130 mm nominal stroke down to as little as 80 mm, creating an 80 to 130 mm usable window. It only sets the end position and does not hold the load without live air pressure.
At 0.5 MPa operating pressure, the SAIJ40X130-50 provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
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