Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 400mm 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
- Stroke400 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75S
The AirTAC SAIJ63X400-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the retract end-position. With a nominal 400 mm stroke and a 75 mm adjustment range, it provides a usable travel window of 325-400 mm to accommodate product changeovers without swapping the hardware. It delivers 1559 N of pull force at 0.5 MPa and 2182 N of push force at 0.7 MPa, fitting a robust medium-duty force class.
This unit includes a SUS420J2 stainless steel rod (option A) for improved corrosion resistance and a PT tapered port. It is equipped with a magnet for position sensing, working seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches. The extruded aluminum barrel integrates sensor grooves on both sides, and the adjustable stopper functions purely as a travel end-point setter, not a load-holding lock.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 400 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 SAIJ63AX400-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×400 | 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 SAIJ63AX400-75S Is Used
Machine Changeover
Dial in the 325-400 mm travel window during product size transitions to set new retract positions instantly without replacing the cylinder.
End-Stop Tuning
Fine-tune the exact end position at commissioning using the rear screw, eliminating the need to fabricate external mechanical stops.
Variable Positioning
Adjust the retract distance on the fly for packaging lines handling varying package lengths within the 75 mm adjustment range.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX400-75S the Right Cylinder?
Choose this 63 mm bore when your application requires around 1559 N of pull force at 0.5 MPa. If you need less force, step down to a 50 mm bore offering 825 N of pull, or step up to an 80 mm bore providing 2268 N of pull for heavier loads. The 75 mm adjustment window is perfect for setups requiring variable end-stops during commissioning, replacing the need to bolt on external stops or use a fixed-stroke SAI cylinder.
Because the nominal stroke is 400 mm, the M16x1.5 rod thread and 20 mm rod diameter should be paired with an external guide to prevent excessive side-loading on the piston. For load-holding without live air pressure, this cylinder is not a lock; you would need to select a SAIL (air-released lock) or BSAI (clamp-lock) cylinder instead. It supports a reduced mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
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 SAIJ63AX400-75S FAQ
At 0.5 MPa, it provides 1559 N of pull force and 1402 N of push force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster acts as a stopper that lets you shorten the effective stroke from 400 mm down to 325 mm. It sets the travel end-point but does not lock the load without live air pressure.
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