Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 225mm 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
- Stroke225 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75S
The AirTAC SAIJ63X225-75-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the 225 mm nominal travel by up to 75 mm, creating a precise 150-225 mm usable window. It delivers a robust 1559 N push force at 0.5 MPa and utilizes a G3/8 port. Equipped from the factory with a SUS420J2 stainless steel rod (option A), it provides excellent corrosion resistance and handles higher side loads than standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides, and because this SKU includes the -S magnet, it is fully compatible with AirTAC CMSE reed and DMSE electronic solid-state switches for exact position feedback.
Unlike a fixed-stroke SAI cylinder, this adjustable model lets you fine-tune the retract end-position during commissioning or product changeover without swapping the barrel or adding external stops. It is important to note that the rear adjuster acts purely as a travel stop alongside the variable air cushions at both ends; it does not lock or hold the load without live air pressure. For applications requiring true load-holding, a SAIL pneumatic lock or BSAI clamp-lock cylinder is required.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 225 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 SAIJ63AX225-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×225 | 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 SAIJ63AX225-75S Is Used
Machine Changeover
Rapidly reconfigure the 150-225 mm stroke window during product size changeovers without replacing the cylinder or bolting on external stops.
End-Position Tuning
Dial in the exact retract position during initial commissioning using the rear 75 mm adjuster, ensuring perfect alignment of the 1559 N force.
Position Feedback Setup
Leverage the integrated magnet and dual sensor grooves to mount CMSE reed or DMSE electronic switches for automated travel verification.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX225-75S the Right Cylinder?
Choose this 63 mm bore cylinder when your application requires a high push force of 1559 N at 0.5 MPa (or 2182 N at 0.7 MPa) alongside a highly variable end-stop. If your force requirements are lower, stepping down to a 50 mm bore yields 982 N at 0.5 MPa, while stepping up to an 80 mm bore provides 2513 N. The 75 mm adjustment range is particularly useful for machinery that processes multiple product sizes, allowing operators to reconfigure the stroke window quickly. When ordering a replacement for any ISO 15552 cylinder, verify the 225 mm stroke, 75 mm adjustment, G3/8 PT ports, and the -S magnet requirement. The available mounting set is restricted to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR options.
Because the nominal stroke is 225 mm, the M16x1.5 piston rod will experience leverage forces during operation. While the SUS420J2 stainless rod offers good rigidity, any application approaching the maximum standard stroke limit should incorporate an external guide to prevent side-load damage to the seals.
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 SAIJ63AX225-75S FAQ
The rear adjuster screw allows you to shorten the effective stroke by up to 75 mm from the 225 mm nominal length, providing a usable travel window of 150-225 mm. The adjuster acts as a mechanical stop and works with the air cushions to decelerate the load, but it does not lock the position without live air pressure.
At 0.5 MPa operating pressure, the push force is 1559 N and the pull force is 1402 N. If you increase the pressure to 0.7 MPa, the push force rises to 2182 N.
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