Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX150-20
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX150-20 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 150mm 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
- Stroke150 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX150-20
The AirTAC SAIJ63X150-20 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 130-150 mm, allowing you to dial back the nominal 150 mm stroke by up to 20 mm during machine commissioning. Delivering a push force of 1559 N and a pull force of 1402 N at 0.5 MPa, it fits seamlessly into standard pneumatic setups.
This model features a SUS420J2 stainless steel piston rod (option A) for enhanced durability against moisture. It uses PT tapered ports sized G3/8 and includes adjustable air cushions at both ends to manage deceleration. Note that the rear adjuster acts strictly as a travel stop; it does not hold the load without live air pressure, so a SAIL or BSAI lock cylinder is required for pneumatic load-holding.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX150-20 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX150-20 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 150 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 SAIJ63AX150-20
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×150 | 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 SAIJ63AX150-20 Is Used
Stroke Fine-Tuning
Dial in the exact end-of-stroke position within a 130-150 mm window during machine commissioning without adding external stops.
Product Changeover
Quickly adjust the retract stop to accommodate different product sizes on a single conveyor line.
Clamp Positioning
Set precise clamping distances using the 1559 N push force, modifying the stop as part thickness varies.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX150-20 the Right Cylinder?
Choose this 63 mm bore when you need more thrust than the 50 mm version (982 N push at 0.5 MPa) but want to avoid the larger footprint of an 80 mm cylinder. The adjustable stroke is ideal for applications requiring variable end-stops or product changeovers, avoiding the need to physically swap out a fixed-stroke SAI cylinder.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 150 mm stroke, 20 mm adjustment range, PT G3/8 port, and mounting style. SAIJ supports a reduced set of mounts: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the stroke is under 300 mm, side-load stress on the M16x1.5 rod thread is moderate, though external guides are still recommended for heavy lateral loads.
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 SAIJ63AX150-20 FAQ
The rear adjuster screw lets you shorten the effective travel from the nominal 150 mm down to 130 mm, providing a 20 mm tuning window without changing the cylinder itself.
At 0.5 MPa operating pressure, the 63 mm bore provides a push force of 1559 N and a pull force of 1402 N. At 0.7 MPa, the push force increases to 2182 N.
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