Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20 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 SAIJ63AX145-20
The AirTAC SAIJ63X145-20 is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 125-145 mm usable travel window, allowing you to dial back the 145 mm nominal stroke by up to 20 mm during commissioning. Featuring a 63 mm bore, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, making it suitable for moderate-to-heavy industrial actuation.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The adjuster acts purely as a mechanical stop to set the retract position and does not lock the load without live air pressure. It uses PT tapered port threads (G3/8) and operates at speeds of 30-800 mm/s.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20 |
|---|---|
| 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 SAIJ63AX145-20
| 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 SAIJ63AX145-20 Is Used
Machine Changeover
Quickly fine-tune the 125-145 mm retract distance when switching between product sizes on a packaging line without adding external stopper blocks.
End-Position Calibration
Dial in the exact end-of-stroke position during machine commissioning to perfect alignment and crush forces without machining new spacers.
Assembly Pressing
Utilize the 1559 N push force at 0.5 MPa for pressing components, relying on the rear screw to set precise travel limits.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20 the Right Cylinder?
Choose this 63 mm bore cylinder when you need precise end-position tuning without swapping components; if your application requires less force, the 50 mm bore offers 982 N push at 0.5 MPa, while stepping up to the 80 mm bore yields 2513 N. The adjustable stroke is ideal for product changeovers on a line, whereas a fixed SAI cylinder is sufficient for static end stops. Because this is a 145 mm stroke, side-load is minimal, but always ensure proper guiding for rigid loads. To match this exact ISO 15552 replacement, specify: 63 mm bore, 145 mm stroke, 20 mm adjustment, PT G3/8 port, and no magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, CR).
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 SAIJ63AX145-20 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it achieves 318 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 145 mm down to 125 mm. It sets the travel end but does not hold the load without continuous air pressure.
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