Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X300-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X300-50S 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X300-50S
The AirTAC SAIJ63X300-50-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 63 mm bore generating 1559 N pull force at 0.5 MPa, alongside a built-in magnet for position sensing. The integrated PT tapered ports and carbon steel rod ensure robust pneumatic performance for demanding industrial setups.
This model provides a nominal 300 mm stroke that can be fine-tuned backward by up to 50 mm, creating a precise 250-300 mm usable travel window. This built-in adjustability eliminates the need to swap cylinders or add external stops during product changeovers. The extruded aluminum barrel includes sensor grooves on both sides, allowing you to easily mount AirTAC CMSE reed or DMSE electronic switches exactly where needed.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X300-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X300-50S |
|---|---|
| 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 SAIJ63X300-50S
| 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 SAIJ63X300-50S Is Used
Product Changeovers
Dial in the 250-300 mm travel window during line changeovers to accommodate different package sizes without swapping out the entire actuator.
End-Stop Tuning
Fine-tune the retract position at machine commissioning to achieve exact positioning, using the rear screw rather than adding external mechanical stops.
Assembly Pressing
Leverage the 1559 N pull force for pressing operations where the exact bottoming depth must be adjusted on the fly to prevent component damage.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X300-50S the Right Cylinder?
Choose this adjustable-stroke cylinder when your application requires variable end-stop positioning or frequent machine setup changes without mechanical rework. If you need less force, stepping down to a 50 mm bore yields 825 N of pull force at 0.5 MPa; stepping up to an 80 mm bore provides 2268 N. Because the nominal stroke is 300 mm, the 20 mm rod diameter and M16x1.5 thread should be paired with an external guide to prevent excessive side-loading on the piston rod.
To match this exact ISO 15552 footprint for a direct replacement, confirm a 63 mm bore, 300 mm stroke, 50 mm adjustment range, PT port threads, and the -S magnet option. Remember that the rear adjuster functions strictly as a travel stop and does not hold the load without live air; for dead-air load holding, consider an AirTAC SAIL or BSAI series cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options.
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 SAIJ63X300-50S FAQ
It features a rear adjusting screw that acts as a mechanical stopper, allowing you to shorten the effective stroke by up to 50 mm. This creates a usable travel window of 250-300 mm, which can be fine-tuned during commissioning without changing the cylinder.
At 0.5 MPa operating pressure, it provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, the push force increases to 318 kgf.
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