Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 240mm 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
- Stroke240 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75S
The AirTAC SAIJ63X240-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to trim the effective travel back by up to 75 mm. This creates a usable 165-240 mm stroke window, providing exceptional flexibility for fine-tuning end positions during machine commissioning or product changeovers without swapping out the entire cylinder. Driven by a G3/8 port, it delivers a robust 1559 N pull force at 0.5 MPa and 1402 N on the retract side.
This specific SKU is configured with a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and includes a built-in magnet (-S) for use with AirTAC CMSE reed and DMSE electronic solid-state sensors. The extruded aluminum barrel features sensor grooves on both sides for flexible switch mounting. The rear adjuster acts purely as a mechanical stop to set the travel end and does not lock or hold the load without continuous live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 240 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 SAIJ63AX240-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×240 | 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 SAIJ63AX240-75S Is Used
Machine Changeover
Quickly dial in the 165-240 mm stroke window during product size transitions on a packaging line without replacing hardware.
Variable End Stops
Set precise retract positions for multi-format assembly fixtures, using the 75 mm rear adjustment screw to fine-tune the resting point.
Sensor-Driven Positioning
Leverage the -S magnet with DMSE electronic sensors to confirm end-of-travel across the adjusted range on automated welding equipment.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX240-75S the Right Cylinder?
Choose this 63 mm bore adjustable-stroke cylinder when your application requires a 165-240 mm travel window and approximately 1559 N of thrust at 0.5 MPa. If your setup demands less force, stepping down to a 50 mm bore yields 982 N push force; conversely, stepping up to an 80 mm bore provides 2513 N. The adjustable rear screw is ideal for dialing in exact end-of-stroke positions on the fly, whereas a fixed-stroke SAI cylinder requires precise upfront dimensions or external stops.
Because the nominal stroke is 240 mm, the 20 mm rod and M16x1.5 rod thread provide good rigidity, though any long, unsupported stroke exceeding 300 mm would require an external guide to manage side loads. To replace an ISO 15552 cylinder, match the 63 mm bore, 240 mm nominal stroke, 75 mm adjustment, PT tapered port threads, and the -S magnet requirement. Note that SAIJ supports a reduced mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2) and omits FB, CA, CB, and CR mounts. If you need true load-holding without live air, consider 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 SAIJ63AX240-75S 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 the maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
The rear adjuster screw allows you to mechanically shorten the 240 mm nominal stroke by up to 75 mm, creating a usable travel window of 165 to 240 mm. This stopper only sets the end position and does not hold the load without continuous air pressure.
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