Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75S 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 SAIJ40BX800-75S
The AirTAC SAIJ40X800-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 725-800mm usable travel window, letting you dial back the 800mm nominal stroke by up to 75mm during commissioning without swapping hardware. It delivers 628N of push force and 528N of pull force at 0.5MPa.
Built for position sensing, this unit includes a magnet for CMSE and DMSE switches and uses a SUS304 stainless steel rod for corrosion resistance. The extruded aluminum barrel carries sensor grooves on both sides. The rear adjuster acts purely as a travel stop for end-position tuning and does not lock the load without live air pressure.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75S |
|---|---|
| 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 SAIJ40BX800-75S
| 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 SAIJ40BX800-75S Is Used
End-Stop Tuning
Fine-tune the retract position within the 725-800mm window during machine setup to perfect timing without replacing the cylinder.
Product Changeovers
Quickly adjust the travel end-stop by up to 75mm on packaging lines when switching to a different product size.
Long-Stroke Assembly
Drive extended reach operations on stainless steel machinery using the SUS304 rod while dialing in the exact contact point.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-75S the Right Cylinder?
Choose this 40mm bore when an application requires 628N push force at 0.5MPa but a 32mm bore (402N) is too weak, or a 50mm bore (982N) is oversized. The 75mm adjustment range is ideal for product changeovers, allowing you to shift the end stop dynamically rather than machining external spacers. For fixed travel needs, a standard SAI cylinder is simpler. Because the 800mm stroke is long, an external guide is recommended to prevent excessive side loading on the 16mm rod.
To match this ISO 15552 interchangeable cylinder, specify: 40mm bore, 800mm stroke, 75mm adjustment, PT tapered ports, SUS304 (B) rod material, -S magnet, and the SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). If your machine requires fail-safe load holding without continuous air, select a SAIL or BSAI series cylinder instead, as the SAIJ adjuster is only a stop.
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 SAIJ40BX800-75S FAQ
At 0.5MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. It operates at speeds between 30-800mm/s.
A rear screw stopper lets you shorten the effective travel from the 800mm nominal stroke down to 725mm. This stopper only sets the end position; it does not lock the load mechanically without live air pressure.
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