Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50S
The AirTAC SAIJ63X135-50-S is a double-acting, ISO 15552 profile cylinder equipped with a rear stroke adjuster that provides an 85-135 mm usable travel window. Delivering 1559 N of push force and 1402 N of pull force at 0.5 MPa, it fits right into medium-duty positioning tasks. The extruded aluminum barrel features sensor grooves on both sides, and the integrated -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches for precise end-of-stroke detection.
This variant features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and utilizes PT tapered port threads. The 50 mm adjustment screw lets you fine-tune the retract end position at commissioning without adding external stops. Remember that the adjuster acts only as a travel stop; for load-holding without live air pressure, you must use a SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 135 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 SAIJ63AX135-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×135 | 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 SAIJ63AX135-50S Is Used
Machine Changeovers
Dial in the 85-135 mm travel window during product size changes without physically swapping cylinders or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stroke end during commissioning to absorb mechanical tolerance variations and achieve exact positioning.
Assembly Station Positioning
Provides 1559 N of thrust at 0.5 MPa for pushing or clamping parts, with the 50 mm rear stopper allowing rapid setup adjustments.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-50S the Right Cylinder?
Choose this 63 mm bore when your application requires around 1559 N of thrust at 0.5 MPa, stepping up from a 50 mm bore (982 N) or down from an 80 mm bore (2513 N). An adjustable stroke is ideal for machine changeovers, allowing you to dial in the exact end-stop on the fly rather than swapping out a fixed-stroke SAI cylinder. To replace an ISO 15552 cylinder, match the 63 mm bore, 135 mm stroke, 50 mm adjustment, PT G3/8 port, and the -S magnet. Since the 135 mm stroke is below the 300 mm side-load threshold, the 20 mm rod handles standard guiding well, though long unsupported loads still need an external guide.
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 SAIJ63AX135-50S FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective travel by up to 50 mm, creating an 85-135 mm usable stroke window. The adjuster only sets the travel end and does not lock or hold the load without live air pressure.
At 0.5 MPa it provides 1559 N push and 1402 N pull force. The -S option includes a magnet that works with AirTAC CMSE reed switches and DMSE electronic solid-state sensors mounted in the dual-side barrel grooves.
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