Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 270mm 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
- Stroke270 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75
The AirTAC SAIJ63X270-75 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa. By turning the rear screw, you can trim the effective travel down by up to 75 mm, creating a highly flexible 195-270 mm usable stroke window. This allows precise end-position tuning at commissioning without swapping out the entire cylinder or adding bulky external stops.
This specific configuration features a SUS420J2 stainless steel rod (material code A) for superior corrosion resistance compared to standard carbon steel. It uses PT tapered port threads (G3/8) and operates without a magnet. The extruded aluminum barrel incorporates sensor grooves on both sides, and the cylinder relies on variable air cushions at both ends to decelerate the load smoothly.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 270 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 SAIJ63AX270-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×270 | 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 SAIJ63AX270-75 Is Used
Product Changeover
Rapidly reconfigure the 195-270 mm stroke window on packaging lines handling varying carton sizes without replacing hardware.
End-Stop Tuning
Fine-tune the exact retracted position of a tooling head during machine commissioning to achieve perfect alignment.
Variable Diverter
Adjust the push distance of a sorting arm on the fly to accommodate different product lengths on the conveyor.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX270-75 the Right Cylinder?
Select this 63 mm bore cylinder when an application requires moderate thrust (1559 N push at 0.5 MPa) alongside highly variable end-stop positioning. If your setup demands less force, stepping down to a 50 mm bore yields 982 N push force; if you need significantly more clamping or lifting power, moving up to an 80 mm bore provides 2513 N. The 75 mm adjustment range is ideal for production lines running multiple product sizes, as operators can dial in the exact stroke on the fly instead of maintaining an inventory of fixed-length SAI cylinders.
Because the nominal stroke is 270 mm, an external guide should be used to prevent excessive side-loading on the M16x1.5 rod thread. To replace an existing ISO 15552 cylinder, verify the 63 mm bore, 270 mm stroke, -75 adjustment, PT G3/8 port, and your required mounting style. Note that the rear adjuster and air cushions act only as travel stops and decelerators; they do not hold the load without live air. For true load-holding, consider an AirTAC SAIL or BSAI cylinder. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 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 SAIJ63AX270-75 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 of push force.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the nominal 270 mm stroke by up to 75 mm. This creates a usable travel window of 195 to 270 mm. It is a travel stop, not a lock, meaning the cylinder still requires live air pressure to hold its position.
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