Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20S
The AirTAC SAIJ40X150-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 130-150mm usable travel window. Delivering 879N of push force at 0.7MPa, it allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. The PT tapered port and integrated magnet prepare it for immediate position feedback.
This variant uses a SUS304 stainless steel rod for superior corrosion resistance and carries the -S magnet option for CMSE reed and DMSE electronic sensors. The rear adjuster acts purely as a travel stop for deceleration, meaning it will not hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 SAIJ40BX150-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 SAIJ40BX150-20S Is Used
Product Changeovers
Dial in the 130-150mm travel window during format changes on a packaging line, avoiding the need to physically swap cylinders for different package sizes.
Machine Commissioning
Fine-tune the retract end-position during setup to perfectly seat components, using the rear stopper to absorb minor mechanical variances without external shims.
Corrosive Assembly Tasks
Leverage the SUS304 stainless steel rod for pushing or clamping tasks in light manufacturing environments where moisture or minor corrosive elements are present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-20S the Right Cylinder?
Choose this 40mm bore when an application requires 879N push force at 0.7MPa, stepping up from a 32mm bore that provides 563N. The 20mm adjustment window is ideal for product changeovers on a line, letting you dial in the exact 130-150mm travel without mechanical rebuilds. If your force needs are lower, a 32mm bore offers a lighter footprint. To replace an ISO 15552 cylinder, match the 40mm bore, 150mm nominal stroke, PT G1/4 port, and the -S magnet.
Because the 150mm stroke is under the 300mm threshold, side-load stress is manageable, but the 16mm rod diameter still requires external guiding for heavy lateral loads. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ40BX150-20S FAQ
At 0.7MPa operating pressure, this 40mm bore cylinder provides 879N of push force and 738N of pull force. It can deliver up to 1130N push force at 0.9MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 20mm, creating a 130-150mm usable travel window. It functions as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
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