Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40 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 SAIJ63X85-40
The AirTAC SAIJ63X85-40 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, allowing you to dial back the nominal 85 mm travel to a precise usable window of 45-85 mm. Delivering 1559 N of push force at 0.5 MPa, it handles mid-range automation tasks with ease. The extruded aluminum barrel features sensor grooves on both sides for flexible switch placement.
This model utilizes a carbon steel piston rod with an M16x1.5 thread and a G3/8 port. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning; it is not a locking device and will not hold a load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40 |
|---|---|
| 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 SAIJ63X85-40
| 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 SAIJ63X85-40 Is Used
Changeover Calibration
Dial in the exact retract distance from 45 to 85 mm during product format changes without physically replacing the actuator.
End-Stop Truing
Fine-tune the final resting position at machine commissioning to achieve precise mechanical alignment against hard stops.
Variable Positioning
Adjust the effective travel window on the fly for automated assembly lines processing parts of slightly different lengths.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-40 the Right Cylinder?
Choose this 63 mm bore cylinder when a 50 mm bore (982 N push at 0.5 MPa) lacks the necessary thrust, but an 80 mm bore (2513 N) would be physically oversized. The 40 mm adjustment range is ideal for applications requiring variable end-stops or frequent product changeovers, eliminating the need to swap out a fixed-stroke SAI cylinder. Ensure your mounting choice comes from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2, as FB, CA, CB, and CR configurations are not supported.
To match this cylinder exactly for an ISO 15552 replacement, verify the 85 mm stroke, 40 mm adjuster, PT tapered port thread, and the absence of a magnet (non-S). Because the stroke is under 300 mm, side-load risks are moderate, but the M16x1.5 rod still requires proper external guiding if subjected to lateral forces.
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 SAIJ63X85-40 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can deliver up to 2182 N of push force at 0.7 MPa.
The rear adjuster screw allows you to mechanically shorten the effective stroke from its 85 mm nominal length down to 45 mm. This creates a 45-85 mm usable travel window for fine-tuning the end position without adding external stops.
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