Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 250mm 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
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-75
The AirTAC SAIJ63X250-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to dial back the nominal 250 mm travel by up to 75 mm, creating a precise 175-250 mm usable window. Delivering 1559 N of push force at 0.5 MPa, it is built with an SUS420J2 stainless steel rod for enhanced corrosion resistance and uses PT tapered port threads with a G3/8 connection.
Because the adjuster acts purely as a mechanical stop, it does not hold the load without live air pressure; for load-holding requirements, consider the SAIL or BSAI series. This profile cylinder supports a speed range of 30-800 mm/s and includes sensor grooves on both sides, though a magnet (-S) must be specified if electronic DMSE or reed CMSE switches are needed.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 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 SAIJ63AX250-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×250 | 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 SAIJ63AX250-75 Is Used
Product Changeovers
Quickly reconfigure the 175-250 mm travel window during production line size changes without replacing the cylinder or adding external mechanical stops.
End-Position Tuning
Fine-tune the retract stroke during machine commissioning to dial in exact stopping points for delicate positioning tasks.
Variable End Stops
Adapt automated equipment to different material lengths on the fly by adjusting the rear stopper screw within the 75 mm range.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX250-75 the Right Cylinder?
Select this 63 mm bore when an application requires moderate thrust (1559 N push at 0.5 MPa) alongside significant end-position flexibility; if you need less force, the 50 mm bore offers 982 N, or you can step up to the 80 mm bore for 2513 N. The 75 mm adjustment range is perfect for machine setups requiring frequent product changeovers, eliminating the need to physically swap out a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 250 mm stroke, PT port thread, and mounting style (choosing from Basic, FA, LB, TC, FTC, TCM1, or TCM2). Since the 250 mm stroke is substantial, ensure adequate external guiding to prevent excessive side-loading on the piston rod.
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 SAIJ63AX250-75 FAQ
It features a rear mechanical stopper screw that allows you to shorten the effective travel from the nominal 250 mm down to as little as 175 mm, providing a 75 mm adjustment window without changing the cylinder itself.
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It can reach up to 2805 N push force at its maximum 0.9 MPa pressure.
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