Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75 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 SAIJ63X85-75
The AirTAC SAIJ63X85-75 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. With a nominal 85 mm stroke and a 75 mm adjustment range, it provides a wide usable travel window from 10 to 85 mm. This allows precise end-position tuning at commissioning without swapping the cylinder or adding external stops. It delivers a robust 1559 N push force at 0.5 MPa, making it suitable for medium-duty operations.
Equipped with a 20 mm carbon steel rod and M16x1.5 rod thread, it handles side loads effectively, though long unsupported strokes still require external guidance. The extruded aluminum barrel includes sensor grooves on both sides for CMSE or DMSE switches, though this base configuration omits the magnet. Mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75 |
|---|---|
| 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 SAIJ63X85-75
| 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 SAIJ63X85-75 Is Used
Variable End-Stop Tuning
Dial in the exact retract position between 10 and 85 mm during machine setup, providing flexibility for varying product lengths without changing hardware.
Product Changeover
Rapidly adjust the stroke window on packaging or sorting conveyors to handle different carton sizes, minimizing downtime between production runs.
Assembly Press Positioning
Fine-tune the end-of-stroke stopping point for sub-assembly pressing tasks, ensuring delicate components are not crushed during commissioning.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63X85-75 the Right Cylinder?
Choose this 63 mm bore when you need more force than a 50 mm cylinder (982 N push at 0.5 MPa) but want to avoid the bulk of an 80 mm unit (2513 N push). The 75 mm adjustment range is ideal for product-size changeovers on a packaging line, letting you dial in the exact travel window between 10 and 85 mm on the fly instead of machining custom spacers.
For ISO 15552 replacement matching, verify the 85 mm stroke, 75 mm adjustment, PT tapered port threads, and your required mounting bracket. Remember that the rear adjuster acts only as a travel stop and does not hold the load without live air; for dead-load holding, consider an external rod lock, a pilot-operated check valve, or AirTAC SAIL and BSAI locking cylinders.
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 SAIJ63X85-75 FAQ
At 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 can deliver up to 318 kgf.
The rear adjuster screw lets you shorten the effective travel from the nominal 85 mm down to as little as 10 mm, creating a 10-85 mm usable window. It acts as a mechanical stop to fine-tune the retract position and must not be used as a load-holding lock.
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