Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 125mm 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
- Stroke125 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30
The AirTAC SAIJ63X125-30 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel. With a 125 mm nominal stroke and a 30 mm adjustment range, this model provides a usable travel window of 95-125 mm, letting you dial in the exact end position without adding external stops. It delivers a robust 1559 N push force at 0.5 MPa, making it suitable for medium-duty operations.
This variant features a SUS420J2 stainless steel rod for enhanced durability against moisture, alongside PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. Mounting options include the SAIJ subset of Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB, CA, CB, and CR styles found on other profiles.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 125 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 SAIJ63AX125-30
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | 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 SAIJ63AX125-30 Is Used
Variable End-Stop Positioning
Dial in the retract stroke from 95 to 125 mm during machine setup to accommodate varying material lengths without physically relocating the cylinder mounting.
Product Size Changeovers
Quickly adjust the end-of-travel position on packaging lines when switching between different package dimensions, using the rear screw to fine-tune the stroke.
Medium-Force Actuation
Leverage the 1559 N push force at 0.5 MPa for clamping or pressing components securely in place during secondary machining operations.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-30 the Right Cylinder?
Choose this 63 mm bore when you need more force than a 50 mm cylinder (982 N push at 0.5 MPa) but want to avoid the bulk of an 80 mm bore (2513 N). The 30 mm adjustment screw is ideal for product changeovers, allowing you to shift the retract end-position by up to 30 mm during commissioning rather than swapping the entire cylinder. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for true drop prevention, consider the SAIL or BSAI series.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 125 mm stroke, PT G3/8 port, and the specific 30 mm adjustment requirement. Because the stroke is under 300 mm, side-loading stress is minimal, but always ensure the M16x1.5 rod thread is properly aligned to prevent premature seal wear.
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 SAIJ63AX125-30 FAQ
The rear adjuster screw acts as a mechanical stop that limits the retract stroke. For this model, you can trim the effective travel back by up to 30 mm, creating a usable stroke window of 95-125 mm to fine-tune the end position without changing the cylinder.
At a standard 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can deliver up to 2805 N of push force at its maximum 0.9 MPa pressure.
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