Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 115mm 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
- Stroke115 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-75
The AirTAC SAIJ63X115-75 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 highly flexible 40-115 mm usable travel window, letting you dial in the exact retract end-position during commissioning without swapping out the barrel or adding external stops. It delivers 1559 N of push force at 0.5 MPa and 1402 N of pull force, making it a robust choice for mid-range actuation.
This specific SKU is configured with an SUS420J2 stainless steel piston rod (material code A) for improved corrosion resistance over standard carbon steel. It uses PT tapered port threads (G3/8) and omits the internal magnet, meaning it will not work with CMSE or DMSE sensors unless a magnet (-S) is specified. The extruded aluminum barrel includes sensor grooves on both sides for future upgrades, and the mounting set covers Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 115 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 SAIJ63AX115-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×115 | 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 SAIJ63AX115-75 Is Used
Machine Changeover
Quickly adapt the retract distance for different product sizes on a single line by dialing the rear adjuster between 40 and 115 mm.
Commissioning Tuning
Fine-tune the exact end-position during startup without machining custom spacers or installing external hard stops.
Variable End-Stop Actuation
Provides precise positioning for tooling that requires adjustable retract depths within a 75 mm travel window.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-75 the Right Cylinder?
Choose this adjustable-stroke model when your machine setup requires variable end-stops or frequent product changeovers within a 40-115 mm window. If you need slightly less force, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa; stepping up to an 80 mm bore provides 2513 N. Because the rear screw acts only as a travel stop and the air cushions handle deceleration, this cylinder cannot hold a load without live air pressure—consider SAIL or BSAI series cylinders for true pneumatic locking.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 115 mm nominal stroke, PT G3/8 port, and the 75 mm adjustment range. The SAIJ series omits the FB, CA, CB, and CR mounting styles found on some standard profiles, so verify your mounting interface. Because the nominal stroke is 115 mm, side-load risks are minimal, but long unsupported strokes still require an external guide.
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 SAIJ63AX115-75 FAQ
At 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the 115 mm nominal stroke by up to 75 mm. This creates a usable travel window of 40 to 115 mm, but it does not lock the load without live air pressure.
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