Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 350mm 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
- Stroke350 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50S
The AirTAC SAIJ63X350-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 300-350 mm usable travel window, letting you trim the nominal 350 mm stroke by up to 50 mm during commissioning. Delivering 2182 N of push force at 0.7 MPa, it handles robust actuation tasks. The -S magnet enables position sensing with AirTAC CMSE reed and DMSE electronic switches.
This variant uses a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. Air cushions at both ends decelerate the moving load, but remember the rear stopper only sets the travel end—it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 350 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 SAIJ63AX350-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×350 | 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 SAIJ63AX350-50S Is Used
Product Changeover
Dial in the 300-350 mm travel window during packaging format changes without replacing the cylinder or bolting on external stops.
End-Position Tuning
Fine-tune the retract end position at machine commissioning to absorb mechanical tolerances and achieve exact positioning.
Variable Stops
Adjust the stroke dynamically for diverter gates on a conveyor line handling different package sizes.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX350-50S the Right Cylinder?
Choose this 63 mm bore when you need more thrust than a 50 mm cylinder (982 N push at 0.5 MPa) but less bulk than an 80 mm bore (2513 N push at 0.5 MPa). The 50 mm adjustment range is ideal for product changeovers on a line, allowing variable end-stops without swapping cylinders or adding external stops. For load-holding without live pressure, select the SAIL or BSAI series instead, as the SAIJ adjuster is a stop, not a lock.
To replace an ISO 15552 cylinder, match the 63 mm bore, 350 mm stroke, 50 mm adjuster, PT tapered G3/8 port, and the -S magnet. With a 350 mm stroke, the 20 mm rod and M16x1.5 thread can carry moderate side loads, but an external guide is recommended for long unsupported travel. SAIJ 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 SAIJ63AX350-50S FAQ
At 0.7 MPa, this 63 mm bore cylinder provides 2182 N of push force and 1402 N of pull force. The maximum thrust is 318 kgf at 1.0 MPa.
The rear adjuster screw allows you to shorten the effective stroke by up to 50 mm. This creates a 300-350 mm usable travel window for fine-tuning the end position without changing the cylinder.
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