Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 375mm 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
- Stroke375 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20
The AirTAC SAIJ63X375-20 is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a usable travel window of 355 to 375 mm, allowing you to dial back the end position by up to 20 mm during commissioning without adding external stops. In the 63 mm bore class, it delivers a push force of 1559 N and a pull force of 1402 N at 0.5 MPa operating pressure.
This variant features a SUS420J2 stainless steel rod for improved corrosion resistance and uses PT tapered port threads with a G3/8 connection. The extruded aluminum barrel includes sensor grooves on both sides, and while this unit omits the magnet option, the grooves remain ready for CMSE reed or DMSE electronic sensors if needed later.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 375 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 SAIJ63AX375-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×375 | 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 SAIJ63AX375-20 Is Used
Variable End-Stop Tuning
Dial in the exact 355 to 375 mm end position during machine commissioning to accommodate varying product dimensions without swapping hardware.
Product Changeover
Quickly adjust the retract stop by up to 20 mm on packaging lines handling different package sizes, reducing downtime between production runs.
Long-Stroke Assembly Press
Utilize the 1559 N push force at 0.5 MPa to drive long-travel pressing or seating operations, fine-tuning the final contact position on the fly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-20 the Right Cylinder?
Choose this 63 mm bore adjustable-stroke cylinder when your application requires precise end-position tuning at machine setup or product changeover. If your force requirements are lower, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa; stepping up to an 80 mm bore provides 2513 N. The rear adjuster acts strictly as a travel stop to set deceleration, not as a lock. If you need to hold a load without live air pressure, select the SAIL or BSAI series instead.
Because the 375 mm stroke is relatively long, the 20 mm carbon steel rod diameter and M16x1.5 rod thread will still experience leverage forces under side loading. An external guide rail is recommended to prevent binding over this travel distance. This model is dimensionally interchangeable per ISO 15552 and uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR).
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 SAIJ63AX375-20 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum rated pressure of 1.0 MPa, the push force reaches 318 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the nominal 375 mm stroke by up to 20 mm, creating a 355 to 375 mm usable travel window. It sets the end position but does not lock or hold the load without continuous air pressure.
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