Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30 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 SAIJ63AX185-30
The AirTAC SAIJ63X185-30 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to dial back the nominal 185 mm travel by up to 30 mm. This creates a usable end-position window of 155 to 185 mm, letting you fine-tune the retract stop at commissioning or during product changeovers without adding external stops. The 63 mm bore delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa.
This SKU is configured with a SUS420J2 stainless steel rod (option A) for improved corrosion resistance over standard carbon steel. It uses PT tapered port threads (G3/8) and operates at speeds of 30-800 mm/s. The extruded aluminum barrel includes sensor grooves on both sides, and because no magnet is specified, position sensing would require external mounts rather than the integrated CMSE or DMSE switches. The rear adjuster acts purely as a travel stop to set deceleration alongside the standard air cushions, meaning it will not hold a load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30 |
|---|---|
| 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 SAIJ63AX185-30
| 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 SAIJ63AX185-30 Is Used
Machine Changeover Tuning
Quickly adjust the retract end-stop by up to 30 mm when switching between product sizes on a packaging line, avoiding the need to physically swap cylinders.
Assembly Position Calibration
Dial in the exact 155-185 mm travel window during commissioning to ensure precise pressing or forming operations without re-machining hard stops.
Variable Diverter Stroke
Modify the actuation distance on a sorting diverter to accommodate different package lengths on the fly using the rear adjustment screw.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX185-30 the Right Cylinder?
Choose this 63 mm bore adjustable cylinder when your setup requires exact end-position tuning within a 155-185 mm travel window. If your application needs less force, stepping down to a 50 mm bore yields 982 N of push force at 0.5 MPa; if you need more power, stepping up to an 80 mm bore provides 2513 N. The integrated rear screw is ideal for variable end-stops during machine changeovers, replacing the need to physically swap a fixed-stroke SAI cylinder for every product size.
When matching an ISO 15552 replacement, verify your bore (63), stroke (185), adjustment range (30 mm), port size (PT G3/8), and rod material (SUS420J2). SAIJ supports a specific mounting subset: Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that this plain SAIJ does not hold its position or lock the load without live air; for fail-safe load holding, consider the SAIL or BSAI series. Because the 185 mm stroke is under the 300 mm threshold, side-load risks are moderate, but the 20 mm rod and M16x1.5 thread still handle external forces best when guided.
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 SAIJ63AX185-30 FAQ
At a 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 delivers up to 318 kgf.
The rear adjuster screw acts as a mechanical stop that lets you shorten the 185 mm nominal stroke by up to 30 mm, providing a usable travel window of 155 to 185 mm. It sets the end position and works with the air cushions for deceleration, but it is not a lock and will not hold the load without live air pressure.
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