Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20S 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 SAIJ63AX145-20S
The AirTAC SAIJ63X145-20-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers a robust 1559N pull force at 0.5 MPa and provides a usable travel window of 125 to 145 mm, letting you dial back the nominal 145 mm stroke by up to 20 mm during commissioning. The -S suffix equips the piston with a magnet for CMSE reed and DMSE electronic sensors.
This unit features a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and uses a PT tapered port thread. The extruded aluminum barrel includes sensor grooves on both sides. The rear adjuster acts purely as a mechanical stop to fine-tune the end position; it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20S |
|---|---|
| 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 SAIJ63AX145-20S
| 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 SAIJ63AX145-20S Is Used
Machine Changeover
Fine-tune the 125-145mm travel window during product size changes to set exact end positions without mechanical rework.
Variable End-Stop Setup
Dial in the precise retract distance for assembly tooling, using the 20mm rear adjuster to compensate for fixture tolerances.
Automated Clamping
Provides 1559N pull force at 0.5MPa for holding workpieces, with the SUS420J2 rod resisting workshop moisture.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-20S the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (offering 825N pull at 0.5 MPa) is insufficient, but an 80 mm bore (2268N pull) would be excessive. An adjustable stroke is ideal for product changeovers or variable end-stops, allowing precise tuning without swapping cylinders or adding external stops. For load-holding without live air, select the SAIL or BSAI series instead, as this adjuster is not a lock.
As a dimensionally interchangeable ISO 15552 cylinder, replacement requires matching the 63 mm bore, 145 mm stroke, 20 mm adjustment, PT G3/8 port, and -S magnet. Mounting options include 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 SAIJ63AX145-20S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559N pull force and 1559N push force. At 0.7 MPa, it delivers 2182N.
The rear adjuster screw lets you shorten the effective stroke by up to 20mm, creating a 125-145mm travel window. It acts as a mechanical stop for end-position tuning and is not a lock.
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