Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-30
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-30 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 SAIJ40BX80-30
The AirTAC SAIJ40X80-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 80 mm stroke that can be fine-tuned backward by up to 30 mm, creating a precise 50-80 mm usable travel window. This bore delivers 628 N of push force and 528 N of pull force at 0.5 MPa operating pressure.
This specific configuration includes a SUS304 stainless steel piston rod for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel incorporates sensor grooves on both sides for flexible mounting of CMSE reed or DMSE electronic sensors. End-position tuning is achieved mechanically at the rear stopper without needing external stops or cylinder swaps.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-30 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-30 |
|---|---|
| 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 SAIJ40BX80-30
| 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 SAIJ40BX80-30 Is Used
Product Changeover Adjustment
Dial in the 50-80 mm travel window during packaging line format changes to accommodate varying container sizes without replacing the actuator.
End-Stop Commissioning
Fine-tune the final retract position during machine setup to align tooling precisely, using the rear screw to dial out mechanical gaps.
Variable Positioning Stops
Set specific retract distances for automated assembly presses that need flexible end-points based on the specific component being handled.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX80-30 the Right Cylinder?
Choose this 40 mm bore when an application requires roughly 628 N of push force at 0.5 MPa, stepping up from a 32 mm bore (402 N) for heavier payloads, or down from a 50 mm bore (982 N) to save space and air volume. The 30 mm adjustment range is ideal for machine setups requiring variable end-stops or product changeovers, offering a 50-80 mm travel window without swapping a fixed-stroke SAI cylinder.
The rear adjuster functions strictly as a travel stop to set deceleration and end-position, not as a locking device. It cannot hold a load without live air pressure. For true fail-safe load holding, select an AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder. This SAIJ model is dimensionally interchangeable per ISO 15552 and uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ40BX80-30 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. If operating at 0.7 MPa, the push force increases to 879 N.
The rear adjuster acts as a mechanical stop that allows you to shorten the 80 mm nominal stroke by up to 30 mm, providing a usable travel window of 50 to 80 mm. It only sets the end position and does not lock the load without air pressure.
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