Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-40
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-40 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 SAIJ40BX190-40
The AirTAC SAIJ40X190-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window between 150 and 190 mm without adding external stops. Delivering 628N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threading. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount position switches if needed later.
Unlike a fixed-stroke SAI cylinder, this model lets you dial in the exact retract end-position during commissioning or product changeover. The rear adjuster acts purely as a travel stop to set deceleration limits and does not lock or hold the load without live air pressure. It supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-40 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-40 |
|---|---|
| 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 SAIJ40BX190-40
| 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 SAIJ40BX190-40 Is Used
Variable End-Stop Setup
Dial in the exact retract position within the 150-190 mm window during machine commissioning to avoid remachining hard stops.
Product Size Changeover
Quickly adjust the end-stop on packaging lines when transitioning between different carton or product lengths.
Fixture Positioning
Fine-tune clamping travel on stainless-steel fixtures where exact end-positioning is critical and a fixed stroke is too rigid.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-40 the Right Cylinder?
Choose this 40mm bore when you need more thrust than the 32mm version (402N at 0.5 MPa) but want to keep the port size compact at G1/4. The adjustable 150-190 mm travel window is ideal for machines processing varying product sizes, giving you a variable end-stop instead of machining custom spacers. Because the total stroke is 190 mm, the 16mm rod and M12x1.25 thread handle moderate side loads, though long unsupported strokes still require an external guide. For dead-stop positioning, the rear screw is a stop, not a lock; if you need true fail-safe load holding without live air, look to the SAIL or BSAI series. This SKU uses PT ports and no magnet.
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 SAIJ40BX190-40 FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster screw allows you to shorten the nominal 190mm stroke by up to 40mm, creating a usable travel window of 150 to 190mm. This stop sets the travel end and deceleration, but it does not lock the load without live air pressure.
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