Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40S 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 SAIJ63AX145-40S
The AirTAC SAIJ63X145-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers 1559 N of push force at 0.5 MPa and features a 20 mm rod with an M16x1.5 thread. The built-in rear stopper allows you to trim the effective travel, providing a usable stroke window of 105 to 145 mm without needing external stops.
This variant includes a magnetic piston (-S) for use with AirTAC CMSE reed and DMSE electronic sensors, and uses a SUS420J2 stainless steel rod (code A) for improved corrosion resistance. The extruded aluminum barrel incorporates sensor grooves on both sides, and the standard variable air cushions at both ends work alongside the mechanical stopper to decelerate the load smoothly.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40S |
|---|---|
| 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 SAIJ63AX145-40S
| 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 SAIJ63AX145-40S Is Used
Product Changeover
Dial in the 105-145 mm stroke window during format changes on packaging lines, using the rear screw to set new end positions rapidly without replacing the cylinder.
End-Stop Tuning
Fine-tune the retracted position of a clamping mechanism at commissioning, absorbing mechanical tolerances by adjusting the stroke back by up to 40 mm.
Assembly Pressing
Apply up to 1559 N of push force at 0.5 MPa for light pressing tasks, relying on the adjustable stop to prevent over-travel and damage to delicate components.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX145-40S the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore (982 N push at 0.5 MPa) lacks thrust but an 80 mm bore (2513 N) is physically too large. The 40 mm adjustment range is ideal for machine setups requiring frequent product changeovers, allowing precise end-position tuning at commissioning rather than machining custom spacers or swapping to a fixed-length SAI cylinder. To match this exact ISO 15552 replacement, specify: 63 mm bore, 145 mm stroke, 40 mm adjust, PT tapered ports, SUS420J2 rod, and the -S magnet.
Because the 145 mm stroke is below the 300 mm threshold, side-load risks are moderate, but always ensure the M16x1.5 rod thread is properly aligned to avoid binding. Remember that the rear adjuster acts only as a travel stop, not a lock; the cylinder cannot hold a load without live air pressure. For load-holding requirements, consider an AirTAC SAIL or BSAI series cylinder instead.
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 SAIJ63AX145-40S 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 operational speed range is 30-800 mm/s.
The rear adjusting screw acts as a mechanical stopper, allowing you to shorten the nominal 145 mm stroke by up to 40 mm. This creates a usable travel window of 105 to 145 mm, which can be fine-tuned during setup. The adjuster only sets the travel end and does not lock the load without air pressure.
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