Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-75S 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 SAIJ63X950-75S
The AirTAC SAIJ63X950-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a usable travel window of 875 to 950 mm, allowing you to dial back the effective stroke by up to 75 mm during commissioning without adding external stops. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa and 2182 N at 0.7 MPa.
This unit includes a standard carbon steel rod and a -S magnet for position sensing. The extruded aluminum barrel features sensor grooves on both sides, supporting AirTAC CMSE reed and DMSE electronic solid-state switches. The rear adjuster acts purely as a mechanical stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-75S |
|---|---|
| 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 SAIJ63X950-75S
| 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 SAIJ63X950-75S Is Used
Variable End-Stop Positioning
Dial in the exact retract distance between 875 and 950 mm on packaging equipment without physically swapping out a long-stroke cylinder.
Product Size Changeover
Quickly adjust the stroke up to 75 mm to accommodate different material lengths on a processing line during product transitions.
Long-Stroke Machine Setup
Fine-tune the end-of-travel position during initial machine commissioning to perfectly time the 1559 N thrust delivery.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X950-75S the Right Cylinder?
Choose this 63 mm bore if you need the 1559 N thrust at 0.5 MPa and a highly flexible 875-950 mm end-stop window. If your application requires less force, the 50 mm bore offers 982 N; if you need significantly higher thrust, step up to the 80 mm bore providing 2513 N. Because the 950 mm stroke is long and unsupported, you must use an external guide to prevent excessive rod side-loading.
Select this adjustable-stroke SAIJ model over a fixed SAI cylinder when product changeovers require frequent end-position fine-tuning. It uses a PT tapered port thread and supports a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2. For applications requiring the cylinder to hold a load statically without continuous air pressure, use an SAIL pneumatic lock or BSAI clamp-lock cylinder instead, as the SAIJ rear adjuster is not a braking device.
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 SAIJ63X950-75S 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 0.7 MPa, the push force increases to 2182 N.
The rear mechanical stopper allows you to shorten the nominal 950 mm stroke by up to 75 mm, creating an adjustable travel window between 875 and 950 mm. It acts as a travel stop and does not lock the load without live air pressure.
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