Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75 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 SAIJ40BX190-75
The AirTAC SAIJ40X190-75 is a double-acting ISO 15552 profile cylinder featuring a 190 mm nominal stroke and a generous 75 mm rear adjustment range, yielding a usable travel window of 115 to 190 mm. Equipped with a SUS304 stainless steel rod (option B) and PT tapered ports, it delivers 879 N of push force at 0.7 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This adjustable-stroke design allows precise end-position tuning during commissioning without swapping the cylinder or adding external stops. The rear adjuster acts purely as a travel stop and works alongside standard air cushions at both ends to decelerate the load; it does not hold the load without live air pressure. For load-holding requirements, an external SAIL or BSAI locking cylinder is required.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75 |
|---|---|
| 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 SAIJ40BX190-75
| 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 SAIJ40BX190-75 Is Used
Variable End-Stop Positioning
Dial in the exact retraction point between 115 and 190 mm during machine setup to accommodate different material lengths without changing hardware.
Product Size Changeovers
Rapidly adjust the stroke stop on packaging lines when switching between box sizes, leveraging the 75 mm trim range to maintain precise indexing.
Commissioning Fine-Tuning
Trim the final end-of-travel position by fractions of a millimeter during equipment commissioning to perfect the mechanical timing.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX190-75 the Right Cylinder?
Choose this 40 mm bore when an application requires approximately 879 N of push force at 0.7 MPa but demands highly variable end-stops. If your setup needs less force, stepping down to a 32 mm bore yields 563 N; if substantially more thrust is needed, a 50 mm bore provides 1374 N. The 75 mm adjustment window here is ideal for product-size changeovers on a single machine, whereas a fixed-stroke SAI cylinder would require physical replacement for each new product format.
Because the 190 mm stroke approaches a length where side loads can damage seals, ensure external guiding is used to support the load. This SKU is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2), omitting FB, CA, CB, and CR brackets. Without a magnet (-S), it cannot host CMSE reed or DMSE electronic sensors.
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 SAIJ40BX190-75 FAQ
At a standard operating pressure of 0.7 MPa, this 40 mm bore cylinder generates 879 N of push force and 528 N of pull force. It can reach a maximum push force of 1130 N at 0.9 MPa.
The rear adjuster screw acts as a mechanical stop that shortens the effective stroke from its 190 mm nominal length down to a minimum of 115 mm. This provides a 75 mm tuning window for variable end positions, though it functions only as a travel stop and does not lock the load without continuous air pressure.
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