Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 850mm 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
- Stroke850 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-75
The AirTAC SAIJ63X850-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 850 mm travel that can be fine-tuned down by up to 75 mm, yielding a usable 775 to 850 mm end-position window. Delivering 1559 N of pull force at 0.5 MPa, it suits mid-to-high thrust tasks requiring precise retraction limits.
This variant uses a carbon steel piston rod with an M16x1.5 thread and a G3/8 port. The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches, though this specific SKU is configured without a magnet. The rear adjuster functions strictly as a travel stop to set deceleration limits, not as a locking mechanism to hold loads without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 850 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 SAIJ63X850-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×850 | 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 SAIJ63X850-75 Is Used
Variable End-Stop Tuning
Dial in the exact retraction distance within the 775-850 mm window during machine commissioning to accommodate varying product lengths without mechanical rebuilds.
Product Changeover
Quickly adjust the rear stopper on a packaging line to handle different carton sizes, using the 75 mm trim range to switch formats rapidly.
Long-Stroke Positioning
Utilize the 850 mm travel for extending and retracting actuators on automated assembly lines, relying on the built-in stop for precise end-position calibration.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X850-75 the Right Cylinder?
Choose this 63 mm bore when an application requires the 1559 N pull force at 0.5 MPa, stepping up from a 50 mm bore (982 N pull) or down from an 80 mm bore (2268 N pull). The 75 mm adjustment range is ideal for commissioning fine-tunes or product changeovers, allowing you to dial in the exact retract distance without swapping the cylinder or adding external stopper blocks. For load-holding without continuous air pressure, an external rod lock or a related SAIL pneumatic lock cylinder is required, as the SAIJ adjuster cannot hold a load.
Because the 850 mm stroke is relatively long, the M16x1.5 carbon steel rod will experience deflection under side loads; an external guide rail should be used to prevent premature seal wear. This model is dimensionally interchangeable per ISO 15552 mounting interfaces. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. Porting is PT tapered thread, and the standard speed range is 30-800 mm/s.
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 SAIJ63X850-75 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 318 kgf.
The rear adjuster screw acts as a mechanical stop that shortens the effective stroke from the nominal 850 mm down to a minimum of 775 mm. It sets the travel end and deceleration point but does not lock the load without live air pressure.
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