Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 145mm 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
- Stroke145 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50S
The AirTAC SAIJ63X145-50-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the 145 mm nominal travel by up to 50 mm. This creates a precise 95-145 mm usable positioning window, perfect for accommodating product size changeovers without swapping hardware. It delivers 1559 N of pull force at 0.5 MPa and features a SUS420J2 stainless steel rod for enhanced corrosion resistance.
Fitted with a magnetic piston (-S), this unit supports AirTAC CMSE reed and DMSE electronic sensors housed within the dual-side extruded aluminum barrel grooves. The rear adjuster acts strictly as a travel stop to fine-tune the retract end position, so live air must be maintained to hold the load. It uses a PT G3/8 port and includes adjustable air cushions at both ends to decelerate moving masses smoothly.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 145 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 SAIJ63AX145-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×145 | 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 SAIJ63AX145-50S Is Used
Product Changeover
Quickly reconfigure the 95-145 mm travel window on packaging lines to handle different carton sizes without replacing the cylinder.
End-Stop Calibration
Fine-tune the retract position during machine commissioning to achieve exact placement without adding external mechanical stops.
Variable Positioning
Dial in the exact retraction point for assembly tooling that needs flexible end-locations across multiple product fixtures.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-50S the Right Cylinder?
Choose this 63 mm bore when your application requires the 1559 N pull force at 0.5 MPa, stepping up from a 50 mm bore that provides 825 N, or down from an 80 mm bore yielding 2268 N. The 50 mm adjustment range is ideal for machine setups requiring variable end-stops during commissioning, replacing the need to bolt on external stops or buy a fixed-stroke SAI cylinder. To match this ISO 15552 dimensionally interchangeable cylinder, specify the 63 mm bore, 145 mm stroke, PT G3/8 port, and the -S magnet. Because the 145 mm stroke is below the 300 mm threshold, side-load stress is manageable, but always ensure the M16x1.5 rod thread is aligned to avoid binding. For applications requiring true load-holding without continuous air pressure, consider the SAIL or BSAI locking variants instead of relying on the adjuster.
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 SAIJ63AX145-50S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force. It can reach a maximum push force of 2805 N at 0.9 MPa.
The rear adjuster acts as a mechanical stop that lets you shorten the 145 mm nominal stroke by up to 50 mm, providing a usable travel window of 95-145 mm. It only sets the end position and does not lock the load without live air pressure.
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