Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40 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 SAIJ63AX375-40
The AirTAC SAIJ63X375-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 335 to 375 mm usable travel window, allowing you to dial back the 375 mm nominal stroke by up to 40 mm during commissioning. This bore size delivers 1559 N of pull force at 0.5 MPa, making it well-suited for moderate-to-heavy handling tasks.
This unit uses a SUS420J2 stainless steel rod for enhanced corrosion resistance and features PT tapered port threads (G3/8). The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches. Remember that the rear adjuster acts purely as a mechanical stop for end-position tuning and does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40 |
|---|---|
| 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 SAIJ63AX375-40
| 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 SAIJ63AX375-40 Is Used
Changeover Calibration
Dial in the exact end position during product size changeovers by adjusting the rear screw up to 40 mm without replacing the cylinder.
Variable End Stops
Set precise retraction limits for diverter arms on a conveyor line, tuning the travel window between 335 and 375 mm as needed.
Machine Setup Tuning
Fine-tune the retract stroke during initial machine commissioning to avoid adding external mechanical stops to the frame.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-40 the Right Cylinder?
Select this 63 mm bore cylinder when a 40 mm adjustment range is required to accommodate varying product sizes on a line without physically swapping the actuator. If your application requires less force, stepping down to a 50 mm bore yields 825 N of pull force at 0.5 MPa; stepping up to an 80 mm bore provides 2268 N. Because the stroke is 375 mm, you should use an external guide to prevent side-load damage to the rod and M16x1.5 rod thread.
For a drop-in ISO 15552 replacement, match the 63 mm bore, 375 mm stroke, 40 mm adjustment, PT G3/8 port, and the Basic, FA, LB, TC, FTC, TCM1, or TCM2 mounting set. Note that SAIJ omits the FB, CA, CB, and CR mounts. If your process demands fail-safe load holding without live air, choose a SAIL or BSAI series cylinder instead of relying on the rear stopper.
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 SAIJ63AX375-40 FAQ
The rear adjuster screw lets you shorten the effective travel from the 375 mm nominal stroke down to 335 mm. It acts as a mechanical stop to fine-tune the end position and is not a lock.
At 0.5 MPa it provides 1559 N of pull force and 2182 N at 0.7 MPa. The maximum push force is 2805 N at 0.9 MPa.
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Covers non-human-caused product damage.
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