Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-50S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 80mm 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
- Stroke80 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-50S
The AirTAC SAIJ40X80-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 30-80 mm usable travel window from its 80 mm nominal stroke. Delivering 628 N of push force at 0.5 MPa, it uses a PT tapered port and a SUS304 stainless steel rod for superior corrosion resistance. An integrated magnet enables position sensing with CMSE reed or DMSE electronic switches.
The external rear stopper allows precise end-position tuning at commissioning without adding external stops. This adjuster acts strictly as a travel stop and does not hold the load without live air. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-50S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 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 SAIJ40BX80-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×80 | 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 SAIJ40BX80-50S Is Used
Product Changeover
Dial in the exact 30-80 mm travel window during format changes on a packaging line without swapping hardware.
End-Stop Tuning
Fine-tune the retract position at commissioning to perfect sensor triggering and mechanical alignment.
Corrosive Assembly
Leverage the SUS304 rod and 628 N force for precise pressing tasks in environments requiring high corrosion resistance.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-50S the Right Cylinder?
Choose this 40 mm bore when you need higher force than the 32 mm version (402 N at 0.5 MPa) but want a more compact footprint than the 50 mm option (982 N). The 50 mm adjustment range is ideal for machines requiring frequent product-size changeovers, allowing you to dial in the exact end-stop on the fly rather than swapping a fixed-stroke SAI cylinder.
For load-holding without continuous air pressure, note that this adjuster is not a lock; you would need an external rod lock, a pilot-operated check valve, or a related type like SAIL or BSAI. Because the stroke is under 300 mm, side-load stress on the 16 mm rod thread is minimal, though external guides are still recommended for heavy lateral loads.
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 SAIJ40BX80-50S FAQ
The rear adjuster screw lets you shorten the effective stroke by up to 50 mm, creating a usable travel window of 30-80 mm from the 80 mm nominal stroke. It acts as a mechanical stop and does not lock the load without live air.
At 0.5 MPa, it provides 628 N push and 528 N pull force. The integrated magnet (-S) works directly with AirTAC CMSE reed switches and DMSE electronic sensors.
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