Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 950mm 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
- Stroke950 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20
The AirTAC SAIJ63X950-20 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 930-950 mm, letting you dial back the nominal 950 mm stroke by up to 20 mm during commissioning. This bore delivers 1559 N push force at 0.5 MPa and uses a G3/8 port with a 20 mm rod.
The extruded aluminum barrel includes sensor grooves on both sides for CMSE reed or DMSE electronic switches. The rear screw acts as a travel stop for end-position tuning, not a lock, so live air is required to hold the load. Mounting options are Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 950 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 SAIJ63X950-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×950 | 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 SAIJ63X950-20 Is Used
Machine Setup Tuning
Fine-tune the exact end-of-stroke position within a 930-950 mm window during initial commissioning without swapping cylinders.
Product Changeover
Quickly adjust the retract stop to accommodate slightly different product sizes on a high-mix production line.
Variable End Stops
Dial in the precise extended position for pushing or indexing varying package lengths on a conveyor.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-20 the Right Cylinder?
Choose this adjustable-stroke cylinder when you need fine end-position tuning at machine setup without adding external stops. If your application requires less force, stepping down to a 50 mm bore yields 982 N push at 0.5 MPa. If you need load-holding without live air pressure, use a SAIL or BSAI lock cylinder instead.
Because the 950 mm stroke is long and unsupported, an external guide is recommended to manage side loads. This PT ported, carbon steel rod model is dimensionally interchangeable with ISO 15552 cylinders.
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 SAIJ63X950-20 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 reach up to 2805 N push at 0.9 MPa.
The rear adjuster screw lets you shorten the 950 mm nominal stroke by up to 20 mm, giving a usable travel range of 930 to 950 mm. The adjuster acts as a mechanical stop to decelerate the piston, but it does not hold the load without live air.
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