Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-30S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-30S 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 SAIJ63AX375-30S
The AirTAC SAIJ63X375-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 1559N push and 1402N pull thrust at 0.5 MPa. With a nominal 375 mm stroke, the external stopper screw lets you dial the effective travel back by up to 30 mm, creating a precise 345-375 mm usable window. This allows you to fine-tune the retract end-position at commissioning without swapping out the cylinder or adding external stops.
Because this SKU carries the -S magnet option, it is fully compatible with AirTAC CMSE reed and DMSE solid-state sensors, which seat cleanly into the dual-side extruded aluminum barrel grooves. The piston rod is built from SUS420J2 stainless steel for superior corrosion resistance, and the G3/8 port handles the 30-800 mm/s speed range efficiently. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock, meaning the cylinder cannot hold a load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-30S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-30S |
|---|---|
| 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 SAIJ63AX375-30S
| 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 SAIJ63AX375-30S Is Used
Changeover Adjustment
Dial in the 345-375 mm travel window during product size changeovers without physically swapping the cylinder or adding external stopper blocks.
Variable End Stops
Set precise retract positions for diverter arms on a packaging line, using the rear screw to accommodate varying package lengths on the fly.
Machine Setup Tuning
Fine-tune the end-of-stroke position during initial commissioning to perfectly time the tooling contact, avoiding mechanical hard-stops.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-30S the Right Cylinder?
Select this 63 mm bore when an application requires more force than the 50 mm class (982N push at 0.5 MPa) but less bulk than the 80 mm class (2513N push). The adjustable 345-375 mm travel window is chosen over a fixed-stroke SAI when you need variable end-stops to accommodate product-size changeovers on a line. Since the 375 mm stroke is relatively long, an external guide rail is recommended to prevent side-load damage to the rod and rod thread.
For a true ISO 15552 dimensionally interchangeable replacement, match the 63 mm bore, 375 mm stroke, PT tapered port threads, and -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, deliberately omitting the FB, CA, CB, and CR mounts. If your machine requires fail-safe load holding without live air, step up to the SAIL or BSAI series, as the SAIJ adjuster is not a brake.
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 SAIJ63AX375-30S FAQ
The rear adjuster screw lets you shorten the nominal 375 mm stroke by up to 30 mm, providing a usable travel window of 345-375 mm. This allows you to fine-tune the end position at commissioning without changing the cylinder.
At 0.5 MPa operating pressure, it provides 1559N of push force and 1402N of pull force. At 0.7 MPa, the push force increases to 2182N.
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