Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50 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 SAIJ40BX190-50
The AirTAC SAIJ40X190-50 is a double-acting ISO 15552 profile cylinder with a rear stroke adjuster, giving you a usable travel window of 140 to 190 mm. It delivers 879 N of push force at 0.7 MPa and 528 N of pull force, fitting medium-duty tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and carries a PT tapered port thread. The rear adjuster screw acts purely as a mechanical stop to fine-tune the retract end position during commissioning without adding external stops. It is not a lock, so holding a load without live air requires a separate SAIL or BSAI unit.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50 |
|---|---|
| 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 SAIJ40BX190-50
| 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 SAIJ40BX190-50 Is Used
Machine Changeover
Dial in the exact end-position during product size changes on a packaging line, shifting the travel window within the 140-190 mm range without swapping hardware.
Assembly Calibration
Fine-tune the retract stop during commissioning to perfect part pressing or clamping distances on the fly.
Variable Diverting
Adjust the stroke length on a conveyor sorting station to handle different package dimensions accurately.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-50 the Right Cylinder?
Choose this 40 mm bore if your application needs roughly 879 N of push force at 0.7 MPa, stepping up from the 32 mm bore that provides 563 N. An adjustable stroke is ideal for machine setups requiring variable end-stops or frequent product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder. To replace an ISO 15552 cylinder, match the 40 mm bore, 190 mm nominal stroke, 50 mm adjustment, PT port, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. Because the 190 mm stroke is under 300 mm, side-load stress is minimal, though an external guide is still recommended for heavy lateral loads.
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 SAIJ40BX190-50 FAQ
At 0.7 MPa operating pressure, this 40 mm bore cylinder provides 879 N of push force and 528 N of pull force. It can deliver up to 1130 N of push force at 0.9 MPa.
The rear adjuster screw lets you mechanically shorten the 190 mm nominal stroke by up to 50 mm, creating a 140 to 190 mm usable travel window. It functions as a physical stop for end-position tuning and does not lock the load without live air pressure.
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