Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 115mm 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
- Stroke115 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50S
The AirTAC SAIJ63X115-50-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It delivers a robust 1559N pull force at 0.5MPa, making it suitable for medium-duty operations. The built-in rear stopper allows you to fine-tune the effective travel, creating a usable stroke window between 65 and 115mm without swapping out the physical cylinder.
This specific configuration includes an SUS420J2 stainless steel rod (option A) for superior corrosion resistance and a magnet for position sensing. It integrates seamlessly with AirTAC CMSE reed and DMSE electronic sensors via the dual-side sensor grooves on the extruded aluminum barrel. The rear adjuster acts purely as a mechanical travel stop to decelerate the end position; it is not a lock, so the cylinder cannot hold loads without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 115 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 SAIJ63AX115-50S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×115 | 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 SAIJ63AX115-50S Is Used
Machine Changeover
Rapidly adjust the end-stop position during product size changeovers on a packaging line, shifting travel within the 65-115mm window without disassembling the actuator.
Commissioning Calibration
Fine-tune the exact end-of-stroke position during initial machine setup to dial in precise pressing or clamping depth against variable material thicknesses.
Variable End Stops
Provide a mechanical stop for testing multiple part configurations on the same fixture, utilizing the 50mm adjustment range to accommodate different component heights.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX115-50S the Right Cylinder?
Select this 63mm bore adjustable-stroke cylinder when your application requires precise end-position tuning during commissioning or frequent product changeovers. Instead of bolting on external stops or swapping a fixed-stroke SAI cylinder, the SAIJ63X115-50-S lets you dial in the exact travel within its 65-115mm window. For lighter duties requiring less force, stepping down to a 50mm bore yields 825N of pull force at 0.5MPa, whereas moving up to an 80mm bore provides 2268N.
When replacing an ISO 15552 cylinder, match the 63mm bore, 115mm nominal stroke, 50mm adjustment range, PT tapered port threads, and the -S magnet option. The mounting hardware is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2 interfaces. Because the nominal stroke of 115mm is relatively short, side-load risks are minimal, but always guide long unsupported loads. If your process requires true load-holding without continuous air pressure, consider the SAIL or BSAI series instead.
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 SAIJ63AX115-50S FAQ
The rear adjusting screw acts as a mechanical stop that allows you to shorten the effective travel by up to 50mm. This creates a usable stroke window of 65 to 115mm, letting you fine-tune the end position at commissioning without changing the cylinder.
At an operating pressure of 0.5MPa, this 63mm bore cylinder generates 1559N of pull force and 2182N of push force. It can deliver a maximum push force of 2805N at 0.9MPa.
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