Airtac Adjustable Cylinder SAIJ32 SAIJ32AX850-20S
The AirTAC Airtac Adjustable Cylinder SAIJ32 SAIJ32AX850-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø32mm bore and 850mm 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
- Stroke850 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable, 27 mm
About the Airtac Adjustable Cylinder SAIJ32 SAIJ32AX850-20S
The AirTAC SAIJ32X850-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 850 mm stroke that can be fine-tuned backward by up to 20 mm, creating an exact 830-850 mm usable travel window for precise end-position calibration. In the 32 mm bore class, it delivers 402 N of push force and 345 N of pull force at 0.5 MPa.
This variant includes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and ships with a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic solid-state switches. The rear adjuster acts solely as a mechanical stop to set deceleration and travel endpoints; it does not lock or hold the load without continuous live air pressure.
Airtac Adjustable Cylinder SAIJ32 SAIJ32AX850-20S Technical Specifications
| Model | Airtac Adjustable Cylinder SAIJ32 SAIJ32AX850-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø32 mm |
| Stroke | 850 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 SAIJ32AX850-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 32 | Bore size in mm. |
| ×850 | 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 SAIJ32AX850-20S Is Used
Machine Changeover
Dial in the 830-850 mm travel window during product size transitions on a packaging line without replacing the actuator.
End-Position Tuning
Fine-tune the retract stopper at commissioning to dial out mechanical drift and achieve exact end-of-stroke positioning.
Variable End Stops
Adjust the effective stroke on the fly for automated conveyor sorting gates that handle varying package lengths.
Is the Airtac Adjustable Cylinder SAIJ32 SAIJ32AX850-20S the Right Cylinder?
Choose this 32 mm bore adjustable-stroke cylinder when your machine setup requires variable end-stops or product changeover flexibility without physically swapping out the entire actuator. If an application demands greater thrust, stepping up to the 50 mm bore yields 982 N of push force at 0.5 MPa. Because the stroke is 850 mm, the 12 mm diameter piston rod is highly susceptible to side-loading; an external guide rail is strongly recommended to prevent binding and premature seal wear.
This SKU is dimensionally interchangeable per ISO 15552 and supports a reduced mounting subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). For load-holding requirements without live air, this standard SAIJ adjuster is not a brake; consider the SAIL air-released lock, the BSAI clamp-lock, or an external pilot-operated check valve instead.
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 SAIJ32AX850-20S FAQ
At 0.5 MPa, this 32 mm bore cylinder provides 402 N of push force and 345 N of pull force. It operates at speeds between 30 and 800 mm/s and features a 12 mm rod with an M10x1.25 thread.
The rear mechanical stopper allows you to shorten the effective travel from 850 mm down to 830 mm, providing a 20 mm adjustment window. This enables fine-tuning of the end position at commissioning without adding external stops.
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