Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100S 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 SAIJ40BX800-100S
The AirTAC SAIJ40X800-100-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 700-800mm usable travel window from its 800mm nominal stroke. Delivering 628N of push force at 0.5 MPa, it utilizes a PT tapered port and a SUS304 stainless steel rod for superior corrosion resistance. The integrated magnet supports CMSE reed and DMSE electronic sensors for precise position detection.
This adjustable-stroke design allows you to fine-tune the retract end position during commissioning without swapping the cylinder or adding external stops. The rear adjuster functions strictly as a travel stop, not a lock, meaning it cannot hold a load without live air pressure. For position holding without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100S |
|---|---|
| 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 SAIJ40BX800-100S
| 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 SAIJ40BX800-100S Is Used
Variable End-Stop Tuning
Dial in the exact retract position within the 700-800mm window during machine commissioning to accommodate different product lengths without mechanical modifications.
Product Changeover
Quickly adjust the stroke stop on packaging lines when switching between box sizes, leveraging the 100mm adjustment range to maintain precise positioning.
Corrosive Environment Actuation
Utilize the SUS304 stainless steel rod and 628N force in washdown or mildly corrosive manufacturing settings where standard carbon steel rods would degrade.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX800-100S the Right Cylinder?
Choose this 40mm bore when an application requires approximately 628N push force at 0.5 MPa, stepping up from a 32mm bore (402N) if more thrust is needed, or down from a 50mm bore (982N) to save space. The adjustable stroke is ideal for machine setups requiring variable end-stops or product-size changeovers, providing flexibility that a fixed-stroke SAI cylinder cannot offer. If load-holding is required without live pressure, use an external pilot-operated check valve.
Because this model features an 800mm stroke, the 16mm rod requires external guidance to prevent excessive side-loading and premature seal wear. To match this ISO 15552 dimensionally interchangeable cylinder, specify: 40mm bore, 800mm stroke, 100mm adjustment, PT port, SUS304 rod, and a magnet for CMSE/DMSE sensors. Mounting options include 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 SAIJ40BX800-100S FAQ
At 0.5 MPa operating pressure, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 879N.
The rear adjuster acts as a mechanical stop, allowing you to shorten the effective stroke by up to 100mm, creating a 700-800mm usable travel window. It only sets the end position and does not lock or hold the load without continuous air pressure.
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