Airtac Adjustable Cylinder SAIJ32 SAIJ32BX85-20S
The AirTAC Airtac Adjustable Cylinder SAIJ32 SAIJ32BX85-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø32mm bore and 85mm stroke, G1/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ32 mm
- Stroke85 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable, 27 mm
About the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX85-20S
The AirTAC SAIJ32X85-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that lets you fine-tune the travel window down to 65 mm from an 85 mm nominal stroke. It delivers 402 N of push thrust and 345 N of pull thrust at 0.5 MPa, making it well-suited for lighter-duty positioning tasks. Equipped with a SUS304 stainless steel rod and a magnetic piston for CMSE or DMSE sensors, it provides reliable service in varied environments.
Because the rear adjuster acts purely as a mechanical stop, it decelerates the load alongside the standard air cushions but does not hold the position without live air pressure. For load-holding without continuous pressure, an external rod lock or related SAIL and BSAI series should be used. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting interface is dimensionally interchangeable with ISO 15552 cylinders.
Airtac Adjustable Cylinder SAIJ32 SAIJ32BX85-20S Technical Specifications
| Model | Airtac Adjustable Cylinder SAIJ32 SAIJ32BX85-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø32 mm |
| Stroke | 85 mm |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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, 27 mm |
| Max stroke | Up to 1000 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 (Ø32mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 402 N | 346 N |
| 0.7 MPa | 563 N | — |
| Max (@1.0 MPa) | 82 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac Adjustable Cylinder SAIJ32 SAIJ32BX85-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 32 | 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 Adjustable Cylinder SAIJ32 SAIJ32BX85-20S Is Used
End-Position Tuning
Dial in the exact retract position within a 65-85 mm window during machine commissioning without changing hardware.
Product Changeover
Quickly adapt end-stops for different part sizes on a packaging line using the 20 mm adjustment screw.
Light-Force Positioning
Move lighter payloads with 402 N of push force while relying on the SUS304 rod for corrosion resistance.
Is the Airtac Adjustable Cylinder SAIJ32 SAIJ32BX85-20S the Right Cylinder?
Choose this 32 mm bore when your application requires a compact force profile, stepping down from a 40 mm bore that yields 628 N push at 0.5 MPa, or up if you need the 982 N push of a 50 mm bore. The 20 mm adjustment range is ideal for machine setups requiring variable end-stops during product changeovers, avoiding the need to swap out a fixed-stroke SAI cylinder or bolt on external stops. When matching this ISO 15552 replacement, verify the 85 mm stroke, 20 mm adjustment, G1/8 PT port thread, and the -S magnet for CMSE and DMSE switches.
Since the 85 mm stroke is relatively short, side-load stress on the 12 mm rod is minimal, but always ensure the load is guided to prevent binding. Remember that the rear adjuster is a travel stop, not a clamp; it will not secure the load safely if air pressure is lost.
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 Adjustable Cylinder SAIJ32 SAIJ32BX85-20S FAQ
At 0.5 MPa operating pressure, this 32 mm bore cylinder provides 402 N of push force and 345 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 82 kgf.
The rear adjuster screw lets you mechanically shorten the 85 mm nominal stroke by up to 20 mm, providing a usable travel window of 65 to 85 mm. This stopper works with the air cushions to set the end position but does not lock the load without live air pressure.
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