Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 300mm 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
- Stroke300 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20S
The AirTAC SAIJ63X300-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster, SUS420J2 stainless steel rod, and a built-in magnet for CMSE / DMSE sensors. It delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa. With a nominal 300 mm stroke and a 20 mm rear adjustment screw, it provides a usable travel window of 280 to 300 mm for precise end-position tuning.
Because the stroke is 300 mm, the 20 mm diameter piston rod and M16x1.25 thread should be guided externally to prevent excessive side loading on the seals. The rear adjuster acts purely as a travel stop for commissioning or product changeovers and does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 300 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 SAIJ63AX300-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×300 | 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 SAIJ63AX300-20S Is Used
Product Changeovers
Dial in the exact 280-300 mm travel needed for different package sizes on a packaging line without physically swapping out the cylinder.
Machine Setup Calibration
Fine-tune the end-stop position during initial commissioning to perfect the seating force of 1559 N without machining external stop blocks.
Variable End Stops
Adjust the retract position by up to 20 mm to accommodate multi-format tooling or varying material thicknesses in automated assembly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-20S the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when you need to fine-tune the retract end-position on the fly without adding external stops or swapping the barrel. It bridges the gap between a 50 mm bore (982 N push at 0.5 MPa) and an 80 mm bore (2513 N push at 0.5 MPa). The adjustable 280-300 mm window is ideal for machine setups handling varying product sizes. Remember, the rear screw is a stop, not a lock; it will not hold a load safely without live air.
To replace this ISO 15552 cylinder, match the 63 mm bore, 300 mm nominal stroke, 20 mm adjustment range, PT tapered port thread, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR brackets found on other series. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
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 SAIJ63AX300-20S FAQ
At an operating pressure of 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw allows you to shorten the effective travel from 300 mm down to 280 mm. This creates a 280-300 mm adjustable window for fine-tuning the end position at commissioning, but the screw acts only as a stop and does not lock the load without live air.
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