Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-75 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 145mm 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
- Stroke145 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-75
The AirTAC SAIJ63X145-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster that allows you to trim the effective travel back by up to 75 mm. This creates a highly flexible 70-145 mm usable stroke window, letting you fine-tune the retract end-position during commissioning without swapping out the barrel or adding external stops. Delivering a robust 1559 N push force at 0.5 MPa, it is built to handle demanding industrial loads.
This specific SKU features a SUS420J2 stainless steel rod (option A) for enhanced corrosion resistance and uses PT tapered port threads. The extruded aluminum barrel includes sensor grooves on both sides, though position sensing requires a magnet (-S) to interface with AirTAC CMSE reed or DMSE electronic switches. It supports a speed range of 30-800 mm/s and uses adjustable air cushions at both ends to decelerate the load.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-75 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 145 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 SAIJ63AX145-75
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×145 | 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 SAIJ63AX145-75 Is Used
Product Changeover
Dial in the 70-145 mm stroke window during format changes on a packaging line, hitting exact retract positions without machining new stopper blocks.
Machine Setup
Fine-tune the end-of-stroke position during commissioning to prevent mechanical crashes, using the rear screw to trim travel within the 75 mm range.
Variable Diverters
Adjust the stroke on pneumatic sorting gates to handle different package lengths on the fly, relying on the 1559 N force to move the load.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-75 the Right Cylinder?
Choose this 63 mm bore cylinder when your application requires 1559 N of thrust at 0.5 MPa (or 2182 N at 0.7 MPa). If your process needs less force, stepping down to a 50 mm bore yields 982 N at 0.5 MPa; stepping up to an 80 mm bore provides 2513 N. The 75 mm adjustment range is exceptionally wide, making this model ideal for machines running multiple product sizes that require rapid end-stop changeovers instead of fixed SAI cylinders.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 145 mm nominal stroke, PT port thread, and the required mounting accessory. SAIJ supports a reduced mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). Note that the rear adjuster acts only as a travel stop; it does not hold the load without live air pressure. For true fail-safe load holding, consider the SAIL or BSAI series.
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 SAIJ63AX145-75 FAQ
It features a rear adjuster screw that lets you shorten the 145 mm nominal stroke by up to 75 mm, providing a usable travel window of 70-145 mm. The adjuster acts as a physical stop for the retract end, while the standard air cushions handle deceleration.
At 0.5 MPa operating pressure, the 63 mm bore generates 1559 N of push force and 1402 N of pull force. At 0.7 MPa, the push force increases to 2182 N.
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