Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10S
The AirTAC Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10S 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 SAIJ40BX85-10S
The AirTAC SAIJ40X85-10-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 628N of push force at 0.5 MPa and features a 16mm SUS304 stainless steel rod, making it highly suitable for environments where corrosion resistance is required. By turning the rear screw, you can trim the effective travel within a precise 75-85mm window without adding external stops.
This adjustable-stroke model includes a magnet (-S) for use with AirTAC CMSE reed and DMSE electronic sensors. The extruded aluminum barrel retains standard ISO 15552 mounting dimensions, while the rear adjuster functions strictly as a travel stop to fine-tune the end position during commissioning.
Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10S Technical Specifications
| Model | Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10S |
|---|---|
| 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 SAIJ40BX85-10S
| 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 SAIJ40BX85-10S Is Used
End-Position Tuning
Dial in the exact 75-85mm travel window during machine commissioning to perfect part placement without swapping cylinders.
Product Changeover
Quickly adjust the retract stop on the fly when running a new product size on the line, minimizing downtime.
Corrosive Assembly
Leverage the SUS304 stainless steel rod for light assembly tasks in washdown or corrosive manufacturing environments.
Is the Airtac SAIJ40 Adjustable Cylinder SAIJ40BX85-10S the Right Cylinder?
Choose this 40mm bore when an application requires moderate force (628N push at 0.5 MPa) but demands exact end-position tuning; if you need higher force, stepping up to the 50mm bore provides 982N. Select the SAIJ adjustable version over a fixed SAI cylinder when you need to dial in a specific 75-85mm travel window during machine setup or product changeover. To replace an ISO 15552 cylinder, match the 40mm bore, 85mm stroke, 10mm adjustment, PT tapered port, and -S magnet.
Because the stroke is 85mm, side-load stress is minimal, but always ensure the load is guided to prevent binding. Remember that the rear adjuster is a stop, not a lock; the SAIJ40X85-10-S cannot hold a load without continuous air pressure. For load-holding requirements, consider an AirTAC SAIL or BSAI cylinder.
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 SAIJ40BX85-10S 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 that lets you shorten the nominal 85mm stroke by up to 10mm, creating a 75-85mm usable travel window. It only sets the end position and does not lock the load without air pressure.
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