Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX105-20S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX105-20S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 105mm 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
- Stroke105 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX105-20S
The AirTAC SAIJ63X105-20-S is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 85 mm from the 105 mm nominal stroke. It delivers a robust 1559 N push force at 0.5 MPa, making it suitable for moderate to heavy actuation tasks. The extruded aluminum barrel includes sensor grooves on both sides, and because this unit includes a magnet (-S), it directly supports AirTAC CMSE reed and DMSE electronic solid-state switches for precise position feedback.
This model is built with an SUS420J2 stainless steel rod (option A) for superior corrosion resistance and uses PT tapered port threads (G3/8) for secure pneumatic connections. The rear adjuster acts purely as a mechanical stop to set the end position; it does not lock or hold the load without live air pressure. For load-holding requirements without continuous air, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX105-20S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX105-20S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 105 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 SAIJ63AX105-20S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×105 | 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 SAIJ63AX105-20S Is Used
Machine Commissioning Tuning
Dial in the exact retract end-position within the 85-105 mm window during setup to compensate for mechanical tolerances without disassembling the actuator.
Product Size Changeover
Quickly adjust the stroke stop on packaging lines when processing slightly different carton or material thicknesses, saving downtime.
Pressing & Clamping
Leverage the 1559 N push force at 0.5 MPa for clamping parts, using the rear stopper to precisely set the clamping depth.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX105-20S the Right Cylinder?
Choose this adjustable-stroke SAIJ over a fixed SAI model when you need on-the-fly end-position tuning during machine commissioning or product changeovers without physically swapping cylinders or adding external stops. The 20 mm adjustment window (85-105 mm) is ideal for accommodating minor mechanical tolerances or varying material thicknesses on the line. If your application requires less force, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa; if more force is needed, an 80 mm bore provides 2513 N.
As a dimensionally interchangeable ISO 15552 cylinder, this model matches standard mounting footprints. It uses a reduced mounting accessory set including Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). The 20 mm rod diameter and M16x1.5 rod thread provide excellent rigidity, though for this 105 mm stroke, ensuring proper external guiding is still recommended if heavy side loads are present. For position sensing, rely on CMSE or DMSE sensors.
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 SAIJ63AX105-20S FAQ
The rear external adjuster screw allows you to shorten the nominal 105 mm stroke by up to 20 mm, providing a usable travel window of 85 to 105 mm. This stopper sets the end position but does not hold the load without live air pressure.
At a 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, the push force reaches 318 kgf.
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