Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 225mm 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
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75
The AirTAC SAIJ63X225-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the retract travel by up to 75 mm. This creates a highly flexible 150-225 mm usable stroke window, enabling precise end-position tuning at commissioning without swapping out the cylinder or adding bulky external stops. It delivers 1559 N of pull force at 0.5 MPa and 2182 N at 0.7 MPa, making it suitable for medium-duty handling.
Built with a SUS420J2 stainless steel rod for enhanced corrosion resistance, this 63 mm bore unit uses PT tapered ports and includes variable air cushions at both ends to decelerate moving loads. The extruded aluminum barrel features sensor grooves on both sides, allowing for direct mounting of CMSE reed and DMSE electronic solid-state switches if position feedback is later required.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 225 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 SAIJ63AX225-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×225 | 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 SAIJ63AX225-75 Is Used
Machine Changeover
Dial in the 150-225 mm retract position during product size transitions without swapping tooling or adding external stopper blocks.
End-Stop Calibration
Fine-tune the exact retraction point during commissioning to ensure perfect alignment of clamped or handled parts.
Variable Diverter Arms
Adjust the stroke length on sorting conveyors to accommodate different package sizes on the fly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75 the Right Cylinder?
Select this 63 mm bore model when your application requires 1559 N of pull force at 0.5 MPa, which sits neatly between the 982 N pull of a 50 mm bore and the 2268 N pull of an 80 mm bore. The 75 mm adjustment range is particularly useful for product changeovers on a production line, allowing operators to dial in a new retract distance on the fly rather than machining new hard stops. Because the rear adjuster acts only as a travel stop and the air cushions manage deceleration, this cylinder will not hold its load without live air pressure; for fail-safe load holding, consider an AirTAC SAIL or BSAI cylinder.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 225 mm nominal stroke, PT port thread, and the reduced SAIJ mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Note that this 225 mm stroke exceeds 300 mm, so if your load is heavy or off-center, an external guide should be used to prevent excessive side-loading on the M16x1.5 rod thread.
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 SAIJ63AX225-75 FAQ
The rear adjuster screw acts as a mechanical stop that can shorten the retract stroke by up to 75 mm, giving you a usable travel window of 150-225 mm. It sets the end position and works with the air cushions for deceleration, but it does not lock or hold the load without continuous air pressure.
At a 0.5 MPa operating pressure, the SAIJ63X225-75 provides 1559 N of pull force and 1402 N of push force. At 0.7 MPa, the pull force increases to 2182 N.
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