Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 120mm 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
- Stroke120 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-50
The AirTAC SAIJ63X120-50 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 70 to 120 mm, allowing you to dial back the 120 mm nominal stroke by up to 50 mm. Delivering 1559 N of push force at 0.5 MPa, it is built with an SUS420J2 stainless steel rod and a PT tapered port.
This adjustable design eliminates the need to swap cylinders or bolt on external stops during machine setup. The extruded aluminum barrel includes sensor grooves on both sides for direct mounting of CMSE reed or DMSE electronic switches. The rear screw acts purely as a travel stop for end-position tuning, not a lock, so live air is required to hold the load.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 120 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 SAIJ63AX120-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×120 | 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 SAIJ63AX120-50 Is Used
Product Changeover
Quickly reposition the retract end-stop by up to 50 mm when switching between product sizes on a packaging line, avoiding cylinder teardown.
Machine Setup
Fine-tune the 70-120 mm travel window during commissioning to perfectly time the tooling contact point without adding external mechanical stops.
Variable End Stops
Dial in the exact retraction distance for clamping parts of varying widths, using the rear adjuster to set the precise 70 to 120 mm travel.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX120-50 the Right Cylinder?
Choose this 63 mm bore when your application requires 1559 N of thrust at 0.5 MPa and a highly flexible end-of-stroke position. If you need less force, the 50 mm bore offers 982 N at 0.5 MPa; for heavier loads, the 80 mm bore provides 2513 N. The SAIJ63X120-50 is selected over a fixed SAI cylinder when product sizes change frequently on a line, letting you fine-tune the retract position on the fly.
For ISO 15552 replacement matching, ensure you specify the 63 mm bore, 120 mm nominal stroke, 50 mm adjustment range, PT port thread, and the SUS420J2 (A) rod material. The mounting set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Because the 120 mm stroke is under 300 mm, side-load concerns are minimal, but the 20 mm rod diameter still handles standard lateral stress well.
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 SAIJ63AX120-50 FAQ
At a 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it delivers up to 318 kgf.
The rear adjuster screw lets you mechanically shorten the 120 mm nominal stroke by up to 50 mm, creating a usable travel window of 70 to 120 mm. It functions as a hard stop for end-position tuning and does not lock or hold the load without live air pressure.
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