Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 145mm 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
- Stroke145 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-50S
The AirTAC SAIJ40X145-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 145mm nominal stroke that can be dialed back by up to 50mm, yielding a usable travel window of 95-145mm. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops.
Built with a SUS304 stainless steel rod, this version is ideal for environments where corrosion resistance is required. The integrated magnet (-S) supports position sensing via AirTAC CMSE reed or DMSE electronic solid-state switches mounted in the dual-side sensor grooves. The rear adjuster acts strictly as a travel stop and does not hold the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 145 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 SAIJ40BX145-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×145 | 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 SAIJ40BX145-50S Is Used
Product Changeovers
Quickly dial the stroke from 145mm down to 95mm via the rear screw when adapting the line to different package sizes, avoiding mechanical teardown.
End-Stop Calibration
Fine-tune the exact retract position during machine commissioning to perfect part seating without fabricating custom spacer shims.
Corrosive Environments
Leverage the SUS304 stainless steel rod for light-duty push operations in washdown or chemical-adjacent areas requiring reliable sensor feedback.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX145-50S the Right Cylinder?
Choose this 40mm bore when an application requires moderate thrust and on-the-fly stroke trimming. If you need less force, stepping down to a 32mm bore yields 402N push force at 0.5MPa; stepping up to a 50mm bore provides 982N. The adjustable 95-145mm window is perfect for product changeovers on a line, whereas a fixed SAI cylinder is better for rigid, unchanging end stops.
For a direct ISO 15552 replacement, match the 40mm bore, 145mm stroke, 50mm adjustment, PT tapered port thread, and -S magnet. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the nominal stroke is under 300mm, side-load risks are manageable, but always guide the load externally for optimal longevity. Remember that the rear adjuster is a stop, not a lock; for load-holding without live air, consider SAIL or BSAI cylinders.
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 SAIJ40BX145-50S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At its maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The rear adjuster screw lets you shorten the effective stroke by up to 50mm, creating a usable travel window of 95-145mm. It functions as a mechanical stop to fine-tune the end position and does not lock the load without continuous air pressure.
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