Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40 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 SAIJ63AX300-40
The AirTAC SAIJ63X300-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel window down to 260-300 mm without adding external stops. It delivers a robust 2182 N push force at 0.7 MPa, making it suitable for medium-duty handling tasks. This variant uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads.
The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Note that the rear adjuster acts purely as a travel stop for end-position tuning and deceleration; it does not function as a lock. For applications requiring load holding without live air pressure, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40 |
|---|---|
| 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 SAIJ63AX300-40
| 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 SAIJ63AX300-40 Is Used
Changeover Adjustment
Dial in the exact end-stop distance during machine changeovers to accommodate varying product sizes without swapping hardware.
End-Position Tuning
Trim the travel window back by up to 40 mm at commissioning to perfect the seating force against mechanical stops.
Assembly Line Actuation
Provide consistent 2182 N push force at 0.7 MPa for pressing and clamping tasks along automated assembly lines.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX300-40 the Right Cylinder?
Choose this 63 mm bore when you need more thrust than the 50 mm class (982 N push at 0.5 MPa) but want to avoid stepping up to the heavier 80 mm bore (2513 N push at 0.5 MPa). The 40 mm adjustment range is ideal for machine setups requiring precise variable end-stops during product changeovers, rather than relying on a fixed-stroke SAI cylinder. To replace an ISO 15552 cylinder, match the 63 mm bore, 300 mm stroke, 40 mm adjustment, PT G3/8 ports, and your required mounting (Basic, FA, LB, TC, FTC, TCM1, or TCM2). Because the stroke is 300 mm, use an external guide to prevent excessive side-loading on the M16x1.5 rod thread.
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 SAIJ63AX300-40 FAQ
At 0.7 MPa operating pressure, this 63 mm bore cylinder provides 2182 N of push force and 1402 N of pull force. It can reach up to 318 kgf at 1.0 MPa.
The rear adjuster screw lets you shorten the nominal 300 mm stroke by up to 40 mm, creating a usable travel window of 260-300 mm. This stopper only sets the end position and does not hold the load without live air.
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