Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-50S 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 SAIJ63X950-50S
The AirTAC SAIJ63X950-50-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It delivers 1559 N push and 1402 N pull force at 0.5 MPa. The built-in -S magnet enables position sensing with CMSE reed and DMSE electronic switches. Equipped with a PT tapered port (G3/8) and a 20 mm carbon steel rod, it handles a 950 mm stroke.
The external rear stopper allows you to fine-tune the effective travel window from 900 to 950 mm without adding external stops. This adjuster acts purely as a travel limit and deceleration point; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-50S |
|---|---|
| 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 SAIJ63X950-50S
| 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 SAIJ63X950-50S Is Used
Machine Changeover
Dial in the exact 900 to 950 mm end-position during product size changeovers without physically replacing the cylinder.
Variable End-Stop Diverter
Trim the retract stroke by up to 50 mm to adjust a diverter arm's resting position on the fly for different package sizes.
Long-Stroke Assembly Press
Use the 1559 N push force at 0.5 MPa to drive long-travel assembly motions while fine-tuning the final end-stop.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-50S the Right Cylinder?
Select this 63 mm bore when you need more thrust than a 50 mm bore (982 N at 0.5 MPa) but want a smaller footprint than an 80 mm bore (2513 N at 0.5 MPa). An adjustable stroke is ideal for commissioning fine-tuning or product changeovers, allowing variable end-stops on the fly instead of swapping a fixed-stroke SAI cylinder. To match this ISO 15552 replacement exactly, specify: 63 mm bore, 950 mm stroke, 50 mm adjustment, PT port, and the -S magnet.
Because the 950 mm stroke is long and unsupported, the 20 mm rod with its M16x1.5 thread carries a decent side-load capacity but still requires an external guide to prevent rod bending. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
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 SAIJ63X950-50S 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 achieves 318 kgf.
The rear adjuster screw lets you mechanically shorten the 950 mm nominal stroke by up to 50 mm, providing a usable travel window of 900 to 950 mm. It acts as a physical stop and does not lock the load without live air.
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