Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 800mm 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
- Stroke800 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100
The AirTAC SAIJ40X800-100 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 700-800 mm usable travel window. Delivering 628 N of push force at 0.5 MPa, it utilizes a SUS304 stainless steel rod for superior corrosion resistance. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This model is equipped with a PT tapered port thread and lacks a standard magnet. The rear stopper screw allows you to dial in the exact retract position during commissioning without adding external stops. The adjuster acts purely as a travel stop, meaning it will not hold a load without continuous live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 800 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 SAIJ40BX800-100
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×800 | 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 SAIJ40BX800-100 Is Used
Product Changeover
Dial in the exact 700 to 800 mm retract position during line changeovers without swapping out the entire actuator.
Long-Stroke Diverter
Fine-tune the end stop on extended conveyor routing arms where a fixed 800 mm stroke might overshoot slightly.
Commissioning Calibration
Trim the travel back by up to 100 mm during initial machine setup to perfectly sync multi-axis timing.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100 the Right Cylinder?
Choose this 40 mm bore when you need precise retract positioning over a long 800 mm stroke, stepping up from a 32 mm bore (402 N push at 0.5 MPa) if you require greater thrust. An adjustable stroke is preferred over a fixed SAI cylinder when machine setups involve frequent product changeovers that need slightly different end-of-travel limits. Because the stroke is 800 mm, an external guide is highly recommended to prevent excessive side-loading on the rod.
For an exact ISO 15552 replacement, match the 40 mm bore, 800 mm stroke, 100 mm adjustment range, PT port thread, and Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting interfaces. Since this configuration omits the magnet, it cannot host CMSE or DMSE sensors without changing the piston assembly.
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 SAIJ40BX800-100 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 0.7 MPa, the push force increases to 879 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from its 800 mm nominal length down to 700 mm. It only decelerates and sets the travel end; it does not lock the load without live air.
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