Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20 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 SAIJ40BX195-20
The AirTAC SAIJ40X195-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 175-195 mm usable travel window. Delivering 628 N of push force at 0.5 MPa, it utilizes a SUS304 stainless steel rod for superior corrosion resistance. The G1/4 PT tapered port ensures a tight pneumatic seal.
This adjustable-stroke design allows you to fine-tune the retract end position at commissioning without swapping cylinders or adding external stops. The rear adjuster acts strictly as a travel stop, not a lock, meaning it cannot hold a load without live air. For position holding, consider an external pilot-operated check valve or the SAIL series.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20 |
|---|---|
| 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 SAIJ40BX195-20
| 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 SAIJ40BX195-20 Is Used
End-Position Tuning
Dial in the exact retract distance within the 175-195 mm window during machine commissioning to achieve precise positioning without mechanical shims.
Product Changeover
Quickly adjust the stroke by up to 20 mm on a packaging line when switching to a different product size, minimizing downtime.
Corrosive Assembly
Leverage the SUS304 stainless steel rod in light chemical or washdown assembly stations where a standard carbon steel rod would degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX195-20 the Right Cylinder?
Choose this 40 mm bore when a 32 mm bore (providing 402 N push at 0.5 MPa) is insufficient, but you want to avoid the larger footprint of a 50 mm bore (982 N). The 20 mm adjustment window is ideal for product changeovers on a line, allowing variable end-stops without replacing the cylinder.
For a direct ISO 15552 replacement, match the 40 mm bore, 195 mm stroke, 20 mm adjustment, PT port, and SUS304 rod material. Because this unit lacks the -S magnet, it cannot host CMSE or DMSE sensors. Since the stroke is under 300 mm, side-load stress is minimal, but external guides are 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 SAIJ40BX195-20 FAQ
At 0.5 MPa operating pressure, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw allows you to shorten the effective travel from the nominal 195 mm down to 175 mm. This stopper fine-tunes the end position but does not lock the load without continuous air pressure.
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