Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 325mm 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
- Stroke325 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40S
The AirTAC SAIJ63X325-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, providing a usable travel window of 285 to 325 mm. Delivering 1559 N of push thrust and 1402 N of pull thrust at 0.5 MPa, it handles robust actuation while allowing you to dial in the exact retract position during commissioning. The integrated -S magnet supports position sensing via AirTAC CMSE reed or DMSE electronic solid-state switches mounted into the dual-side sensor grooves.
This variant features an SUS420J2 stainless steel rod (option A) for superior corrosion resistance and uses PT tapered port threads (G3/8). Because the 325 mm stroke is relatively long, the 20 mm rod diameter and M16x1.5 thread should still be paired with an external guide to manage side-load risks on unsupported loads. The rear adjuster acts purely as a mechanical stop to fine-tune the end position without adding external stops, but it does not lock the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 325 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 SAIJ63AX325-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×325 | 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 SAIJ63AX325-40S Is Used
Product Changeover Tuning
Dial in the retract end-position by up to 40 mm when switching a packaging line to a different carton size, without replacing the cylinder or adding external mechanical stops.
Machine Setup Calibration
Fine-tune the 285-325 mm travel window during initial commissioning to perfectly time the mating of heavy components, absorbing mechanical tolerance variations.
Variable End-Stop Actuation
Actuate a diverter arm or clamp on an automated assembly line where the exact end-of-stroke position must be periodically adjusted to accommodate varying part dimensions.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX325-40S the Right Cylinder?
Select this adjustable model when your machine setup requires variable end-stops or product-size changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder. If your application demands higher force, stepping up to the 80 mm bore yields 2513 N of push force at 0.5 MPa; dropping down to the 50 mm bore provides 982 N. To replace this cylinder on an ISO 15552 footprint, match the 63 mm bore, 325 mm nominal stroke, 40 mm adjustment, PT G3/8 port, and -S magnet.
Keep in mind that the rear adjuster and the variable air cushions at both ends only decelerate the travel end; neither holds the load unpowered. For true load-holding without live air, consider the SAIL (air-released lock) or BSAI (clamp-lock) series, or install an external pilot-operated check valve. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally 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 SAIJ63AX325-40S FAQ
At a 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 1.0 MPa pressure, it delivers up to 318 kgf.
The rear adjusting screw acts as a mechanical stop that lets you shorten the effective travel from the 325 mm nominal stroke down to a minimum of 285 mm. It allows precise end-position tuning at commissioning but does not lock the load without live air pressure.
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