Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20 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 SAIJ63AX225-20
The AirTAC SAIJ63X225-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 205-225 mm usable travel window, allowing you to trim the nominal 225 mm stroke by up to 20 mm during commissioning. Delivering 2182 N of push force at 0.7 MPa, it fits mid-range automation tasks perfectly.
This variant uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads with a G3/8 connection. The extruded aluminum barrel includes sensor grooves on both sides, ready for CMSE reed or DMSE electronic switches if a magnet is added later. The rear adjuster acts purely as a mechanical stop to fine-tune the end position and is not a locking device.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20 |
|---|---|
| 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 SAIJ63AX225-20
| 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 SAIJ63AX225-20 Is Used
Product Changeovers
Dial in the 205-225 mm travel window on the fly to accommodate different package sizes on a packaging line without changing cylinder hardware.
End-Position Tuning
Fine-tune the exact retraction point during machine setup using the rear stopper, ensuring precise alignment without adding external shims.
Diverting Mechanisms
Provide adjustable stroke actuation for conveyor diverters where the end-stop distance occasionally needs slight calibration based on product dimensions.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-20 the Right Cylinder?
Select this 63 mm bore cylinder when a 50 mm bore (982 N push at 0.5 MPa) lacks thrust but an 80 mm bore (2513 N) is physically oversized. The 20 mm adjustable window is ideal for applications requiring variable end-stops or product changeovers without swapping the entire cylinder for a fixed-stroke SAI model. To match this ISO 15552 footprint, specify the 63 mm bore, 225 mm stroke, 20 mm adjustment, PT G3/8 port, and your required mounting from the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, or TCM2.
Because the 225 mm stroke exceeds 200 mm, ensure external guide rails support the load to prevent excessive side-loading on the SUS420J2 rod. Remember that the SAIJ adjuster and air cushions only decelerate the travel end; they cannot hold the load without live air. For true load-holding, consider an external rod lock or the SAIL pneumatic lock series.
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 SAIJ63AX225-20 FAQ
At 0.7 MPa operating pressure, this 63 mm bore cylinder provides 2182 N of push force and 1402 N of pull force. At its maximum 1.0 MPa pressure, it achieves 318 kgf.
The rear adjuster screw allows you to mechanically shorten the effective stroke from 225 mm down to a minimum of 205 mm. This creates a 205-225 mm adjustable travel window for fine-tuning the end position at commissioning, but it functions as a stop and does not lock the load.
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