Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-30
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-30
The AirTAC SAIJ63X85-30 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 of push thrust at 0.5 MPa, paired with a nominal 85 mm stroke that can be fine-tuned down by up to 30 mm. This yields a highly versatile 55-85 mm usable travel window, allowing exact end-position calibration during machine commissioning.
Unlike a fixed-stroke SAI unit, this model integrates an external stopper screw at the rear to dial in the retract distance without swapping components. The extruded aluminum barrel houses sensor grooves on both sides, and while this base configuration uses a carbon steel rod with PT tapered ports, it omits the FB, CA, CB, and CR mounting options in favor of the Basic, FA, LB, TC, FTC, TCM1, and TCM2 set.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-30 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 85 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 SAIJ63X85-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×85 | 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 SAIJ63X85-30 Is Used
Changeover Calibration
Dial in the 55-85 mm travel window during product size changeovers on a packaging line without replacing the cylinder.
End-Position Trimming
Fine-tune the retract end stop during machine commissioning to achieve exact seating without adding external mechanical stops.
Variable End Stops
Adjust the effective stroke on the fly for assembly stations that need to accommodate slight variations in incoming part dimensions.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-30 the Right Cylinder?
Select this 63 mm bore cylinder when an application demands precise retract positioning within a 55 to 85 mm window, avoiding the need to bolt on external stops. If your setup requires less force, stepping down to a 50 mm bore yields 982 N of push thrust at 0.5 MPa; conversely, an 80 mm bore provides 2513 N for heavier loads. Remember that the rear adjuster functions strictly as a travel stop and does not hold the load without live air—if true load-holding is required, consider the SAIL or BSAI series.
For an exact ISO 15552 replacement, match the 63 mm bore, 85 mm stroke, -30 mm adjustment, PT port thread, and your required mounting hardware. Because the nominal stroke is under 300 mm, side-load stress on the 20 mm rod is manageable, though long unsupported loads should still utilize an external guide.
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 SAIJ63X85-30 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push thrust and 1402 N of pull thrust. It can reach up to 2805 N of push thrust at its maximum 0.9 MPa pressure.
The rear adjuster screw acts as a mechanical stop that shortens the effective travel by up to 30 mm. For this 85 mm nominal stroke model, it creates a 55-85 mm adjustable travel window, though it only sets the end position and does not lock the load without continuous air pressure.
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