Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 275mm 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
- Stroke275 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20
The AirTAC SAIJ63X275-20 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 255 to 275 mm, enabling precise end-position tuning at commissioning without swapping the barrel or bolting on external stops. The extruded aluminum design integrates sensor grooves on both sides for flexible switch placement.
Delivering 1559 N of pull force at 0.5 MPa and up to 2805 N at 0.9 MPa, this 63 mm bore unit is built for robust actuation. It features a SUS420J2 stainless steel piston rod for superior corrosion resistance and uses PT tapered port threads. The rear adjuster acts purely as a travel stop for deceleration alongside the adjustable air cushions, meaning it will not hold a load dynamically without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 275 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 SAIJ63AX275-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×275 | 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 SAIJ63AX275-20 Is Used
End-Position Tuning
Dial in the exact retract distance within the 255-275 mm window during machine commissioning to perfect product handling without changing hardware.
Product Changeover
Quickly adjust the stroke stopper on the production line when switching to a different package size, minimizing downtime between runs.
Variable Assembly Stops
Set precise physical endpoints for automated assembly presses, relying on the rear stop and air cushions to decelerate the 2805 N maximum force safely.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX275-20 the Right Cylinder?
Choose this adjustable-stroke model when a process requires variable end-stops or frequent product-size changeovers, avoiding the fixed-length limitations of a standard SAI cylinder. If the application demands less force, stepping down to a 50 mm bore yields 825 N of pull at 0.5 MPa; conversely, moving up to an 80 mm bore provides 2268 N of pull. To replace this unit per ISO 15552 mounting-interface dimensions, match the 63 mm bore, 275 mm stroke, 20 mm adjustment, PT G3/8 port, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set.
Because the 275 mm stroke creates a long lever arm on the 20 mm rod, an external guide rail should be used to support side loads and prevent rod binding. For applications requiring true load-holding without continuous air pressure, this plain cylinder is insufficient; consider the SAIL pneumatic lock or BSAI clamp-lock series instead.
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 SAIJ63AX275-20 FAQ
At 0.5 MPa, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force. At 0.9 MPa, the push force increases to 2805 N.
The rear adjuster screw lets you shorten the 275 mm nominal stroke by up to 20 mm, creating a 255-275 mm travel window. It functions as a mechanical stop to fine-tune the end position and is not a locking mechanism.
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