Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 35mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ63 mm
- Stroke35 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S
The AirTAC SAIJ63X35-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 15 to 35 mm, allowing you to dial back the 35 mm nominal stroke by up to 20 mm during commissioning. It delivers a robust 1559 N push force at 0.5 MPa, making it suitable for compact, high-force positioning tasks.
This specific configuration includes a SUS420J2 stainless steel rod for enhanced corrosion resistance and a -S magnet for position sensing. The extruded aluminum barrel features sensor grooves on both sides to accept CMSE reed or DMSE electronic solid-state switches. Pneumatic connections use PT tapered threads, and the standard air cushions at both ends help manage deceleration.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 35 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M16×1.5 |
| 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, 36 mm |
| Max stroke | Up to 1500 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×35 | 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S Is Used
Short-Stroke Positioning
Dial in the exact 15 to 35 mm end-stop for compact clamping or pushing tasks without mechanical rework.
Machine Changeover
Quickly adapt the cylinder's effective travel window when switching between product sizes on a shared line.
Sensor-Ready Assembly
Leverage the built-in magnet and dual sensor grooves for DMSE electronic end-of-stroke confirmation in automated cells.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S the Right Cylinder?
Select this 63 mm bore actuator when your application requires significant force in a short footprint. If you need less thrust, stepping down to a 50 mm bore yields 982 N at 0.5 MPa. The primary reason to choose this SAIJ model over a fixed-stroke SAI cylinder is the external rear stopper, which fine-tunes the end position without swapping hardware or adding external stops during product changeovers.
Because the stroke is short, side-loading stress is minimal, though the 20 mm rod thread handles standard loads well. The rear adjuster acts purely as a travel stop and does not hold the load without live air pressure; for true fail-safe load holding, consider the SAIL or BSAI series. This unit is dimensionally interchangeable per ISO 15552 and supports a reduced mounting set including 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 SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX35-20S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can reach up to 318 kgf at its maximum 1.0 MPa pressure rating.
The rear adjuster screw lets you mechanically shorten the 35 mm nominal stroke by up to 20 mm, creating a 15 to 35 mm usable travel window. This stopper only sets the end position and does not lock the load without continuous air pressure.
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