Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 135mm 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
- Stroke135 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75S
The AirTAC SAIJ63X135-75-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It features a 63 mm bore generating 1559 N of pull force at 0.5 MPa and a 135 mm nominal stroke that can be dialed back by up to 75 mm. This creates a highly flexible 60-135 mm usable travel window, allowing precise end-position tuning during commissioning without swapping the cylinder.
This model includes a SUS420J2 stainless steel rod (code A) for improved corrosion resistance and carries an integrated magnet for position sensing. It works seamlessly with AirTAC CMSE reed and DMSE electronic solid-state switches mounted into the dual-side sensor grooves on the extruded aluminum barrel. The rear screw acts purely as a mechanical stop to set the travel end, meaning it does not hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 135 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 SAIJ63AX135-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×135 | 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 SAIJ63AX135-75S Is Used
Product Changeover
Dial in the 60-135 mm travel window on the fly to accommodate different package lengths on a packaging line without changing out hardware.
Prototype Positioning
Use the 75 mm rear adjuster to fine-tune the extend stroke during machine commissioning until the exact mechanical end-position is found.
Variable End Stops
Set precise retract limits for assembly tooling that must handle multiple part sizes, relying on the 1559 N pull force to operate reliably.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX135-75S the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when an application requires variable end-stops or frequent product-size changeovers, stepping up from a 50 mm bore that yields 825 N of pull force at 0.5 MPa. The generous 75 mm adjustment range is ideal for prototyping or lines running mixed product lengths. Because the nominal stroke is 135 mm, the 20 mm rod and M16x1.5 thread provide robust stability, though any application approaching or exceeding 300 mm of travel would require an external guide to prevent side-loading damage.
When specifying a replacement, verify the 63 mm bore, 135 mm stroke, 75 mm adjustment, PT tapered port threads, and the -S magnet option. Mounting choices are limited to the SAIJ subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR brackets. If the machine requires true load-holding without continuous air pressure, select a SAIL pneumatic lock or BSAI clamp-lock cylinder instead of relying on this rear stopper.
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 SAIJ63AX135-75S FAQ
The rear adjuster acts as a mechanical stop that lets you shorten the 135 mm nominal stroke by up to 75 mm, providing a usable travel window of 60-135 mm. It sets the end position but does not lock the load without live air pressure.
At 0.5 MPa operating pressure, this double-acting cylinder provides 1559 N of push force and 1402 N of pull force. It can reach a maximum push force of 2805 N at 0.9 MPa.
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