Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 105mm 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
- Stroke105 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40S
The AirTAC SAIJ40X105-40-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window from 65 to 105 mm during commissioning. Delivering 879 N of push force at 0.7 MPa, it is built with a SUS304 stainless steel rod and includes a magnet for CMSE and DMSE sensors. The PT tapered port threads ensure a tight, leak-free pneumatic connection.
This adjustable-stroke design eliminates the need to swap cylinders or bolt on external stops when dialing in end positions. The rear adjuster acts solely as a travel stop to set deceleration, meaning it will not hold a load without live air pressure. For applications requiring true load-holding without continuous supply, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 105 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 SAIJ40BX105-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×105 | 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 SAIJ40BX105-40S Is Used
Machine Changeover
Dial in the end position up to 40 mm during product size changes without swapping the cylinder or adding external stops.
Variable End-Stop Positioning
Fine-tune the retract stroke within the 65-105 mm window to precisely set the deceleration point for varying workpiece lengths.
Sensor-Ready Actuation
Leverage the built-in magnet and dual sensor grooves to easily mount CMSE or DMSE switches for precise end-of-travel detection.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX105-40S the Right Cylinder?
Choose this 40 mm bore when 628 N of push force at 0.5 MPa is sufficient, stepping down from a 63 mm bore that yields 1559 N. The 40 mm adjustment range is ideal for product changeovers on a line, letting you shift the end-stop by up to 40 mm without changing the cylinder. It uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 brackets, omitting FB, CA, CB, and CR options.
Because the 105 mm stroke is under 300 mm, side-load risks are minimal, though long unsupported strokes still need an external guide. The M12x1.25 rod thread and 16 mm rod diameter carry moderate side loads well. To replace this cylinder with an ISO 15552 equivalent, match the 40 mm bore, 105 mm stroke, 40 mm adjustment, PT G1/4 port, and -S magnet.
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 SAIJ40BX105-40S FAQ
This 40 mm bore cylinder provides 628 N of push force and 528 N of pull force at 0.5 MPa. At 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw acts as a travel stop, allowing you to shorten the effective stroke from the nominal 105 mm down to 65 mm. It sets the end position but does not lock or hold the load without live air pressure.
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