Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10S
The AirTAC SAIJ40X50-10-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the end-of-travel position. With a nominal 50 mm stroke and a 10 mm adjustment range, it provides a usable travel window of 40 to 50 mm. This specific configuration includes a SUS304 stainless steel rod for superior corrosion resistance and a PT tapered port thread.
Delivering 628 N of push force at 0.5 MPa, it features an extruded aluminum barrel with sensor grooves on both sides. Equipped with a magnet, this unit is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state sensors for precise position detection. The rear stopper sets the retract end position but does not lock the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 SAIJ40BX50-10S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 SAIJ40BX50-10S Is Used
Machine Changeover
Dial in the 40-50 mm travel window during product size transitions without physically replacing the cylinder or bolting on external stops.
Commissioning Calibration
Fine-tune the retract end-position to perfect machine timing at startup using the rear adjustment screw.
Variable End Stops
Adjust the effective stroke dynamically to accommodate varying material thicknesses or positioning offsets on the line.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX50-10S the Right Cylinder?
Choose this 40 mm bore cylinder when your application requires 628 N of push force at 0.5 MPa and on-the-fly end-position tuning during commissioning. The adjustable rear screw lets you dial in the exact 40-50 mm travel window without swapping cylinders or adding external stops, which is ideal for machine setups requiring frequent product changeovers. If you need less force, the 32 mm bore provides 402 N; if your setup demands higher thrust, the 50 mm bore offers 982 N.
For load-holding applications without continuous live air, note that the SAIJ rear adjuster acts only as a travel stop, not a brake. You should consider the SAIL or BSAI series for positive locking. To match this exact configuration, specify a 40 mm bore, 50 mm stroke, 10 mm adjustment, PT ports, SUS304 rod, and a magnet for CMSE/DMSE sensors.
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 SAIJ40BX50-10S FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At the maximum pressure of 1.0 MPa, it delivers up to 128 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 10 mm, creating a usable travel window between 40 and 50 mm from the nominal 50 mm stroke. This stopper only sets the travel end and does not lock the load without live air pressure.
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