Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 195mm 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
- Stroke195 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20S
The AirTAC SAIJ40X195-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 175-195 mm usable travel window, allowing you to dial back the 195 mm nominal stroke by up to 20 mm during commissioning. Delivering 879 N of push force at 0.7 MPa, it fits perfectly into medium-duty setups.
This variant features a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel houses sensor grooves on both sides, and the G1/4 port ensures efficient airflow for its 30-800 mm/s speed range.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 195 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 SAIJ40BX195-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×195 | 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 SAIJ40BX195-20S Is Used
Machine Changeover
Quickly adapt end positions for different product sizes on a packaging line without physically replacing the cylinder.
End-Stop Calibration
Fine-tune the 175-195 mm travel window during initial commissioning to achieve exact positioning without external shims.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod for reliable actuation in environments requiring high corrosion resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20S the Right Cylinder?
Select this 40 mm bore when you need more power than the 32 mm version (563 N push at 0.7 MPa) but want a smaller footprint than the 50 mm option (1374 N). The adjustable stroke is ideal for product changeovers, letting you fine-tune the end position without swapping the cylinder or adding external stops. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true load-holding, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 195 mm stroke, 20 mm adjustment, PT port thread, and -S magnet. Because the stroke is close to 200 mm, ensure your mounting choice from the available SAIJ set (Basic, FA, LB, TC, FTC, TCM1, TCM2) properly supports the load to avoid excessive rod side-loading.
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 SAIJ40BX195-20S FAQ
The rear adjuster screw allows you to shorten the effective travel by up to 20 mm, creating a 175-195 mm usable window. It acts as a mechanical stop to fine-tune the retract position and is not a locking device.
At 0.7 MPa operating pressure, it provides 879 N of push force and 739 N of pull force. At 0.5 MPa, the push force is 628 N.
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