Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-75S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-75S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 185mm 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
- Stroke185 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-75S
The AirTAC SAIJ63X185-75-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a nominal 185 mm stroke that can be dialed back by up to 75 mm, yielding a usable travel window of 110 to 185 mm. Delivering 1559 N of pull force at 0.5 MPa, it integrates a SUS420J2 stainless steel rod and a PT tapered port for robust pneumatic performance.
This variant includes a built-in magnet for position sensing, compatible with AirTAC CMSE reed and DMSE electronic switches mounted into the dual-side sensor grooves. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning; it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-75S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-75S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 185 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 SAIJ63AX185-75S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×185 | 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 SAIJ63AX185-75S Is Used
Variable End-Stop Configuration
Dial in the retract position anywhere from 110 to 185 mm during machine setup to accommodate different material lengths without external stopper hardware.
Product-Size Changeover
Quickly reconfigure the effective stroke on packaging lines when switching between box sizes, relying on the 75 mm adjustment window for rapid format changes.
Commissioning Fine-Tuning
Trim the final end-position by fractions of a millimeter during equipment assembly to align tooling perfectly, avoiding the need to physically swap cylinders.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-75S the Right Cylinder?
Choose this 63 mm bore when you need 1559 N pull force at 0.5 MPa, stepping down from the 80 mm bore (2268 N pull) if your load is lighter, or up from the 50 mm bore (825 N pull) for higher thrust. The 75 mm adjustment range is ideal for machinery requiring frequent product-size changeovers, allowing you to set variable end-stops without adding external stops or swapping a fixed-stroke SAI cylinder. To replace an ISO 15552 cylinder, match the 63 mm bore, 185 mm stroke, PT port, and Basic/FA/LB/TC/FTC/TCM1/TCM2 mounting interface. The 20 mm rod and M16x1.5 thread handle high side loads, but at 185 mm stroke, ensure external guidance if the load is unsupported.
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 SAIJ63AX185-75S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force. At the maximum 1.0 MPa pressure, it can deliver up to 318 kgf.
The rear adjusting screw acts as a mechanical stop, allowing you to shorten the effective stroke from its nominal 185 mm down to 110 mm. This creates a 75 mm adjustable travel window for fine-tuning end positions without replacing the cylinder.
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