Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-20S 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 SAIJ63AX125-20S
The AirTAC SAIJ63X125-20-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a 125 mm nominal stroke and a 20 mm adjustment range, it provides a usable travel window of 105 to 125 mm. This allows you to dial in the exact retract end-position at commissioning without swapping hardware. Operating at 0.5 MPa, it delivers 1559 N of pull force and 2182 N at 0.7 MPa.
This variant includes an SUS420J2 stainless steel rod (option A) for improved corrosion resistance and runs on PT tapered port threads (G3/8). The extruded aluminum barrel integrates dual sensor grooves, and the included magnet (-S) supports CMSE reed and DMSE electronic solid-state switches for precise position feedback. The rear adjuster acts purely as a travel stop for deceleration, so it will not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-20S |
|---|---|
| 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 SAIJ63AX125-20S
| 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 SAIJ63AX125-20S Is Used
Machine Changeovers
Quickly reconfigure the retract distance within the 105-125 mm window during product size changes on a packaging line without bolting on external stoppers.
End-Position Tuning
Fine-tune the exact end-of-stroke position at commissioning using the rear screw to absorb mechanical tolerance variations in the fixture.
Assembly Pressing
Apply up to 2182 N of push force at 0.7 MPa for pressing tasks while using the adjuster to set a precise travel limit for delicate components.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-20S the Right Cylinder?
Select this 63 mm bore when your application requires 1559 N pull force at 0.5 MPa, stepping up from a 50 mm bore (982 N pull) for heavier payloads, or down from an 80 mm bore (2268 N pull) to save space. Choose the adjustable-stroke SAIJ over a fixed SAI when you need variable end-stops for product changeovers or fine-tuning during machine setup. To match this cylinder for an ISO 15552 replacement, verify the 63 mm bore, 125 mm stroke, 20 mm adjustment, PT G3/8 port, and the -S magnet requirement. Since the stroke is under 300 mm, side-load stress on the M16x1.5 rod thread is moderate, but an external guide remains recommended for heavy lateral loads. For load-holding without live air, select the SAIL or BSAI series instead, as the SAIJ adjuster is not a lock.
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 SAIJ63AX125-20S FAQ
At 0.5 MPa, this 63 mm bore cylinder provides 1559 N pull force and 1402 N push force. At 0.7 MPa, it delivers 2182 N push force. The operational speed range is 30-800 mm/s.
The rear adjuster screw allows you to shorten the effective travel by up to 20 mm, creating a 105 to 125 mm usable stroke window. It functions as a mechanical stop to set the end position and does not lock the load without continuous air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Request a Quote for Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX125-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.