Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX20-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX20-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 20mm 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
- Stroke20 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX20-20
The AirTAC SAIJ63X20-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 1559N push force at 0.5 MPa and allows you to dial back the 20mm nominal stroke by up to 20mm, creating a highly versatile 0-20mm usable travel window for precise end-position tuning.
This variant uses a SUS420J2 stainless steel rod for enhanced durability and PT tapered ports. The extruded aluminum barrel includes sensor grooves on both sides, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX20-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX20-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 20 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 SAIJ63AX20-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×20 | 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 SAIJ63AX20-20 Is Used
Short-Stroke Clamping
Dial in the exact 0-20mm clamping distance during machine commissioning to accommodate varying material thicknesses without external stops.
Product Changeover
Rapidly adjust the rear stopper to modify the end-of-stroke position when switching the production line to a new product size.
End-Position Tuning
Fine-tune the retract end position to within a fraction of a millimeter, ensuring precise mechanical alignment without adding external bumpers.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX20-20 the Right Cylinder?
Choose this adjustable model when your machine setup requires variable end stops or product changeover flexibility without swapping cylinders. The 20mm stroke with a 20mm adjuster is ideal for short-travel clamping or positioning tasks where fine-tuning at commissioning is critical. If you need higher force, stepping up to the 80mm bore yields 2513N at 0.5 MPa.
Remember that the rear adjuster acts as a travel stop, not a lock; the SAIJ cannot hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series. This cylinder is dimensionally interchangeable with ISO 15552 cylinders and operates at speeds from 30-800 mm/s.
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 SAIJ63AX20-20 FAQ
At 0.5 MPa operating pressure, this 63mm bore cylinder provides a push force of 1559N and a pull force of 1402N. The maximum push force is 2805N at 0.9 MPa.
The rear adjusting screw allows you to shorten the effective stroke by up to 20mm. Since the nominal stroke is 20mm, this gives you a 0-20mm usable travel window to fine-tune the retract end position without replacing the cylinder.
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