Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50S 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 SAIJ40BX190-50S
The AirTAC SAIJ40X190-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force and 528N of pull force at 0.5 MPa, featuring a 16mm SUS304 stainless steel rod for superior corrosion resistance. By turning the rear screw, you can trim the effective travel, creating a precise 140-190mm usable window from the 190mm nominal stroke without bolting on external stops.
This adjustable-stroke configuration is ideal for fine-tuning end positions during machine commissioning or product changeovers. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet operates seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches. It features variable air cushions at both ends and PT tapered port threads (G1/4) for reliable pneumatic connections.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50S |
|---|---|
| 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 SAIJ40BX190-50S
| 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 SAIJ40BX190-50S Is Used
Machine Commissioning
Dial in the exact 140-190mm end position during setup using the rear adjuster, avoiding the need to physically swap cylinders or add external stopper blocks.
Product Size Changeover
Quickly adapt automated lines to different packaging formats by adjusting the retract stroke up to 50mm, minimizing downtime between production runs.
Corrosive Positioning
Leverage the SUS304 stainless steel rod and adjustable end-stop to precisely push or pull loads in environments where standard carbon steel rods would degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50S the Right Cylinder?
Select this 40mm bore when an application requires approximately 628N push force at 0.5 MPa, stepping up from a 32mm bore (402N) if extra thrust is needed, or down to a 50mm bore (982N) if the load increases. The 50mm adjustment range is particularly useful for prototyping or lines running multiple product sizes, allowing you to dial in the exact end-stop mechanically rather than swapping cylinders. When specifying an ISO 15552 replacement, match the 40mm bore, 190mm stroke, PT port thread, -S magnet, and the required mounting accessory.
Because the nominal stroke is 190mm, standard mounting guidance applies, but always ensure adequate external guiding for the load. Remember that the rear adjuster acts strictly as a travel stop and the air cushions provide deceleration; neither will hold the load dynamically without continuous air pressure. For load-holding requirements without live air, consider an AirTAC SAIL pneumatic lock cylinder, a BSAI clamp-lock model, or an external rod lock. Mounting options include 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 SAIJ40BX190-50S 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 acts as a mechanical stop that lets you shorten the effective stroke by up to 50mm. This creates a usable travel window of 140-190mm from the 190mm nominal stroke, allowing precise end-position tuning at commissioning without changing the cylinder.
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