Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30S 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 SAIJ63AX185-30S
The AirTAC SAIJ63X185-30-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster. It delivers a 1559 N pull force at 0.5 MPa and provides a usable travel window of 155-185 mm, letting you dial back the nominal 185 mm stroke by up to 30 mm during commissioning. This cylinder includes a magnet for CMSE reed and DMSE electronic sensors, and features a SUS420J2 stainless steel rod (code A) for improved corrosion resistance.
The rear adjuster acts purely as a mechanical stop to fine-tune the end position without swapping the cylinder or bolting on external stops. It does not hold the load without live air pressure; for true fail-safe load holding, consider the SAIL or BSAI series. SAIJ uses a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30S |
|---|---|
| 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 SAIJ63AX185-30S
| 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 SAIJ63AX185-30S Is Used
Commissioning End-Tuning
Dial in the exact retract position within the 155-185 mm window during machine setup without adding external stops.
Product Size Changeovers
Quickly adjust the retract length on a packaging line when handling different product sizes.
Variable End-Stop Positioning
Set precise end positions for multi-tier tooling plates using the 30 mm adjustment range.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30S the Right Cylinder?
Choose this 63 mm bore when you need approximately 1559 N of pull force at 0.5 MPa and a variable end-stop for product changeovers. If your application requires less force, stepping down to a 50 mm bore yields 825 N of pull force, while stepping up to an 80 mm bore provides 2268 N. The PT tapered port threads and G3/8 air supply match the standard 63 mm interface.
Because the stroke is 185 mm, no external guide is strictly required for side loads, but the 20 mm rod diameter and M16x1.25 thread handle moderate side loads well. For load-holding without live pressure, you must add an external rod lock or pilot-operated check valve, as the rear adjuster is not a brake. This model is dimensionally interchangeable per ISO 15552.
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 SAIJ63AX185-30S FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 1559 N of push force. At 0.7 MPa, the push force increases to 2182 N.
The rear adjuster acts as a mechanical stop that lets you shorten the effective stroke from 185 mm down to as little as 155 mm. It allows fine-tuning of the end position during commissioning but does not lock the load without live air pressure.
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