Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75S 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 SAIJ63AX375-75S
The AirTAC SAIJ63X375-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a robust 1559 N push force at 0.5 MPa and features a 375 mm nominal stroke that can be fine-tuned backward by up to 75 mm, yielding a precise 300-375 mm usable travel window. This built-in adjustability allows operators to dial in exact retract end positions during commissioning or product changeovers without swapping out the entire actuator.
This specific configuration includes a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and a built-in magnet (-S) for position sensing. The sensor groove on both sides of the extruded aluminum barrel accommodates AirTAC CMSE reed and DMSE electronic solid-state switches. Fluid supply connects via a PT G3/8 tapered port, while variable air cushions at both ends manage end-of-stroke deceleration across its 30-800 mm/s operating speed range.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75S |
|---|---|
| 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 SAIJ63AX375-75S
| 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 SAIJ63AX375-75S Is Used
Machine Changeover
Rapidly reconfigure retract end positions for different product sizes on a packaging line using the 75 mm adjustment window instead of physically replacing actuators.
Commissioning Calibration
Fine-tune the exact end-of-stroke position during setup to perfect tooling alignment, utilizing the 300-375 mm travel range without adding external stopper blocks.
Variable End Stops
Accommodate multiple part lengths in automated assembly stations by dialing the rear adjuster screw to shift the 1559 N thrust point as needed.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX375-75S the Right Cylinder?
Selecting this 63 mm bore actuator provides 1559 N of thrust at 0.5 MPa, stepping up meaningfully from a 50 mm bore (982 N) while avoiding the bulk of an 80 mm bore (2513 N). The 75 mm adjustment range is ideal for machinery requiring flexible retract distances, acting as a mechanical stop rather than a lock. Because the rear adjuster and air cushions only set travel limits and cannot hold a load without live air, applications needing true fail-safe holding should utilize an external rod lock or explore the SAIL or BSAI series. To replace an ISO 15552 cylinder, match the 63 mm bore, 375 mm stroke, 75 mm adjuster, PT G3/8 port, and the -S magnet requirement.
Since this model features a 375 mm stroke, the extended M16x1.5 piston rod is subject to increased side-loading forces. For optimal longevity and to prevent binding, external guide rails should be installed to support the load, ensuring the cylinder absorbs only axial thrust. The available mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, intentionally omitting FB, CA, CB, and CR options.
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 SAIJ63AX375-75S 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 its maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
The rear adjuster screw acts as a mechanical stop that allows you to shorten the 375 mm nominal stroke by up to 75 mm, creating a usable travel window of 300-375 mm. It is a travel stop, not a lock, meaning the cylinder cannot hold a load without continuous air pressure.
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