Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40S 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 SAIJ40BX150-40S
The AirTAC SAIJ40X150-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that trims the nominal 150 mm travel back by up to 40 mm. This yields a usable 110-150 mm end-position window, allowing precise mechanical tuning during commissioning without adding external stops. In the 40 mm bore class, it delivers 628 N push and 528 N pull thrust at 0.5 MPa, operating at speeds of 30-800 mm/s.
This specific SKU is built with a SUS304 stainless steel rod for superior corrosion resistance and includes a magnet for position sensing. The barrel extrusion features sensor grooves on both sides, enabling direct mounting of AirTAC CMSE reed or DMSE electronic solid-state switches. It uses a PT tapered port thread and provides adjustable air cushions at both ends to manage impact forces.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40S |
|---|---|
| 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 SAIJ40BX150-40S
| 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 SAIJ40BX150-40S Is Used
Machine Changeover
Dial in the exact retract end-stop within the 110-150 mm window when switching a packaging line to a different carton size, eliminating the need to physically swap cylinders.
End-Position Tuning
Fine-tune the final resting position during commissioning to align tooling perfectly, using the rear adjuster rather than fabricating custom external spacers.
Corrosive Assembly Lines
Leverage the SUS304 stainless steel rod and 628 N thrust for pressing or lifting tasks in washdown or mildly corrosive manufacturing environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX150-40S the Right Cylinder?
Select this 40 mm bore adjustable cylinder when an application requires fine-tuning the retract end-position within a 110-150 mm travel window. If your process needs less force, stepping down to a 32 mm bore yields 402 N push at 0.5 MPa; if higher clamping force is required, a 50 mm bore provides 982 N. The SAIJ40X150-40-S is chosen over a fixed SAI cylinder to accommodate product size changeovers on a shared line. It is dimensionally interchangeable per ISO 15552 and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts (omitting FB, CA, CB, and CR). Configuration: 40 mm bore, 150 mm stroke, 40 mm adjustment, PT ports, SUS304 rod, with magnet (-S).
Because the rear adjuster acts purely as a mechanical stop and the cushions only decelerate travel, this cylinder cannot hold a load without live air pressure. For fail-safe load holding, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock.
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 SAIJ40BX150-40S 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 the maximum 1.0 MPa pressure, it can deliver up to 128 kgf.
The external rear adjusting screw acts as a mechanical stopper, allowing you to shorten the effective stroke from 150 mm down to 110 mm. This creates a 110-150 mm usable travel window for fine-tuning end positions without replacing the cylinder.
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