Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 190mm 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
- Stroke190 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20S
The AirTAC SAIJ40X190-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 170-190mm usable travel window from its 190mm nominal stroke. Delivering 879N of push force at 0.7 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for CMSE reed and DMSE electronic sensors.
This adjustable-stroke model allows you to fine-tune the retract end position during commissioning without swapping cylinders or adding external stops. It uses a PT tapered port thread and shares the standard SAI mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock to hold loads without live air.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 190 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 SAIJ40BX190-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×190 | 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 SAIJ40BX190-20S Is Used
Machine Changeover Tuning
Dial in the exact retract end-stop within the 170-190mm window during product size changes without disassembling the line.
Sensor-Ready Positioning
Leverages the built-in magnet and dual sensor grooves to easily mount CMSE reed or DMSE solid-state switches for precise end-of-stroke detection.
Corrosive Environment Actuation
Ideal for packaging or food-grade lines where the SUS304 stainless steel rod provides necessary resistance against moisture and washdowns.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-20S the Right Cylinder?
Choose this 40mm bore cylinder when your application requires 879N of thrust at 0.7 MPa, stepping up from a 32mm bore (563N) for higher force demands, or down from a 50mm bore (1374N) to save space. The adjustable 170-190mm travel window is perfect for machine setups requiring variable end stops during product changeovers. If you need to hold a load position without live air pressure, this cylinder's adjuster will not function as a lock; consider an AirTAC SAIL or BSAI series instead.
To match this ISO 15552 interchangeable replacement, specify: 40mm bore, 190mm stroke, 20mm adjustment range, PT tapered port thread, SUS304 stainless steel rod material, and a magnet for CMSE/DMSE sensors. For any stroke of 300mm or more, an external guide is recommended to handle side loads, though this 190mm unit is well within standard unsupported limits.
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 SAIJ40BX190-20S FAQ
At 0.7 MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 528N of pull force. The maximum thrust is 128 kgf at 1.0 MPa.
The rear adjuster screw lets you mechanically shorten the effective stroke by up to 20mm, creating a 170-190mm usable travel window. It functions as a hard stop for end-position tuning, not as a locking mechanism.
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