Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 85mm 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
- Stroke85 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75S
The AirTAC SAIJ63X85-75-S is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a 10-85 mm usable travel window by trimming up to 75 mm from the 85 mm nominal stroke, allowing precise end-position tuning without swapping hardware. The 63 mm bore delivers 1559 N pull force at 0.5 MPa, making it robust enough for moderate industrial handling.
This variant includes a standard carbon steel piston rod and a magnet for position sensing. The dual-side sensor grooves accept AirTAC CMSE reed and DMSE electronic solid-state switches. Fluid ports are PT tapered, and the extruded aluminum barrel design integrates adjustable air cushions at both ends to smooth out end-of-travel impacts.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 85 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 SAIJ63X85-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×85 | 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 SAIJ63X85-75S Is Used
Machine Changeover
Dial in the exact end-stop for different product sizes on a packaging line without physically replacing the cylinder or adding external spacers.
Commissioning Calibration
Fine-tune the retract position during initial machine setup to perfect sensor triggers and mechanical timing across a 10-85 mm window.
Variable Forming Stops
Adjust the bottoming-out point for light press or positioning tasks where the material thickness or stopper height varies between runs.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75S the Right Cylinder?
Choose this 63 mm bore when your application requires around 1559 N of pull force at 0.5 MPa. If your setup needs less force, step down to a 50 mm bore providing 825 N pull; if you need more clamping power, step up to an 80 mm bore yielding 2268 N pull. The SAIJ63X85-75-S is selected specifically for setups needing variable end-stops during commissioning or product changeover, unlike a fixed-stroke SAI cylinder.
Because the stroke is 85 mm, external side-load guides are less critical here than on longer strokes, though the 20 mm rod and M16x1.5 thread handle standard lateral loads well. Remember that the rear adjuster is a travel stop, not a lock; this cylinder will not hold a load without live air. For load-holding requirements, consider an AirTAC SAIL or BSAI cylinder. To match ISO 15552 interchangeability, specify bore 63, stroke 85, 75 mm adjustment, PT ports, and the -S magnet.
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 SAIJ63X85-75S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force. It can deliver up to 318 kgf at its maximum 1.0 MPa pressure rating.
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from 85 mm down to as little as 10 mm. This creates a 10-85 mm usable travel window for fine-tuning end positions at commissioning without replacing the cylinder.
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