Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 155mm 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
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20S
The AirTAC SAIJ63X155-20-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a 135-155 mm usable travel window, allowing you to dial back the nominal 155 mm stroke by up to 20 mm during commissioning. Delivering 1559 N of pull force at 0.5 MPa, it fits perfectly into medium-duty pneumatic setups.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance and includes a magnet (-S) for position sensing. The extruded aluminum barrel houses sensor grooves on both sides, compatible with AirTAC CMSE reed and DMSE electronic solid-state switches. It uses a G3/8 port and omits the FB, CA, CB, and CR mounts, utilizing a focused mounting set of Basic, FA, LB, TC, FTC, TCM1, and TCM2.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 155 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 SAIJ63AX155-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×155 | 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 SAIJ63AX155-20S Is Used
Changeover Calibration
Dial in the exact 135-155 mm end-stop during machine changeovers without physically swapping the cylinder or adding shims.
Variable End Positioning
Fine-tune the retract stroke on packaging equipment to accommodate slight variations in product size or folding depth.
Assembly Line Setup
Set precise retraction points during initial commissioning to prevent over-travel and ensure consistent part seating.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-20S the Right Cylinder?
Select this 63 mm bore when an application requires precise end-position tuning without swapping cylinders or adding external stops; its 20 mm adjustment window is ideal for product changeovers. If your setup needs less force, stepping down to a 50 mm bore yields 825 N of pull force at 0.5 MPa, while stepping up to an 80 mm bore provides 2268 N. The 16 mm rod and M16x1.5 thread handle side loads well, but for this 155 mm stroke, ensure external guiding if the load is heavy or off-center. To replace an ISO 15552 cylinder, match the 63 mm bore, 155 mm stroke, 20 mm adjuster, PT tapered port threads, and the -S magnet requirement.
Remember that the rear adjuster acts strictly as a travel stop, not a lock. The cylinder cannot hold a load without live air pressure; for dead-air load holding, consider an AirTAC SAIL pneumatic lock, a BSAI clamp-lock cylinder, or an external rod lock.
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 SAIJ63AX155-20S FAQ
The rear adjuster screw lets you shorten the effective travel by up to 20 mm, creating a 135-155 mm usable stroke window. It acts as a physical stop to fine-tune the retract position without changing the cylinder.
At 0.5 MPa operating pressure, it provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
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