Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 85mm 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
- Stroke85 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10
The AirTAC SAIJ40X85-10 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the travel window down to a 75-85 mm range. Delivering 628 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads.
This adjustable-stroke design eliminates the need to swap cylinders or add external stops during machine commissioning. It features an extruded aluminum barrel with sensor grooves on both sides, though this specific SKU omits the magnet, meaning position sensing via CMSE or DMSE switches is not supported without modification.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10 Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 85 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 SAIJ40BX85-10
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×85 | 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 SAIJ40BX85-10 Is Used
End-Stop Tuning
Dial in the exact 75-85 mm retract position during machine setup without physically swapping out the entire actuator.
Product Changeover
Quickly adjust the rear stopper by up to 10 mm to accommodate slight variations in product sizes on a packaging line.
Corrosive Environments
Leverage the SUS304 stainless steel rod for reliable actuation in light-duty manufacturing where moisture is present.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10 the Right Cylinder?
Choose this 40 mm bore when you need more thrust than a 32 mm cylinder (which provides 402 N at 0.5 MPa) but want to avoid the bulk of a 50 mm option. The 10 mm rear adjuster acts strictly as a mechanical stop to dial in the exact retract position; it does not lock or hold the load without continuous air pressure. For load-holding requirements, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 40 mm bore, 85 mm nominal stroke, 10 mm adjustment range, PT port threads, and the absence of a magnet. The SAIJ utilizes a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
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 SAIJ40BX85-10 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 acts as a mechanical stop that shortens the nominal 85 mm stroke, creating a 75-85 mm usable travel window. It sets the end position but does not hold the load without live air pressure.
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