Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 160mm 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
- Stroke160 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-20
The AirTAC SAIJ40X160-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 160 mm stroke by up to 20 mm for a usable travel window of 140-160 mm. It delivers 879 N of push force at 0.7 MPa and features a SUS304 stainless steel piston rod for superior corrosion resistance. The standard extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model uses a PT tapered port thread and relies on adjustable air cushions at both ends to decelerate the load. The rear stopper mechanism is designed strictly for fine end-position tuning during commissioning or product changeovers, replacing the need to bolt on external stops or swap the entire cylinder.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 160 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 SAIJ40BX160-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 SAIJ40BX160-20 Is Used
Product Changeover
Dial in the 140-160 mm travel window on the fly to accommodate different package lengths without changing the cylinder.
Commissioning Setup
Fine-tune the exact retract end-position during machine commissioning, avoiding the need to add external mechanical stops.
Variable End Stops
Achieve precise positioning in automated assembly lines by adjusting the stroke to meet exact product dimensions.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX160-20 the Right Cylinder?
Choose this 40 mm bore when an application requires moderate force and precise variable end-stops; step down to a 32 mm bore (402 N push at 0.5 MPa) for lighter loads, or up to a 50 mm bore (982 N push at 0.5 MPa) when more thrust is needed. An adjustable stroke is ideal for machine setups that handle multiple product sizes, whereas a fixed-stroke SAI cylinder suits dedicated single-task stations.
To replace this ISO 15552 cylinder, match the 40 mm bore, 160 mm stroke, 20 mm adjustment range, PT G1/4 port, and the required mounting bracket from the SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true fail-safe load holding, consider the SAIL or BSAI series. Because the stroke is 160 mm, side-load risks are minimal, but long unsupported strokes still need an external guide.
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 SAIJ40BX160-20 FAQ
This 40 mm bore cylinder provides 628 N of push force and 528 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw lets you shorten the effective travel from the nominal 160 mm down to 140 mm, giving a 140-160 mm adjustable window. It functions as a travel stop for end-position tuning and does not lock the load without live air pressure.
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