Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 155mm 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
- Stroke155 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50
The AirTAC SAIJ63X155-50 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that allows you to fine-tune the effective travel down to 105 mm from the 155 mm nominal length. Operating at 0.15-1.0 MPa, it delivers a 1559 N push force at 0.5 MPa, making it well-suited for mid-range actuation tasks. The barrel is extruded aluminum with sensor grooves on both sides, though no magnet is specified for this configuration.
This model utilizes a SUS420J2 stainless steel piston rod (material code A) for enhanced durability against minor scratching and corrosion compared to standard carbon steel. It features PT tapered port threads (G3/8) and adjustable air cushions at both ends to manage end-of-stroke impact. The rear adjuster functions strictly as a mechanical stop to set the retract position, not as a lock to hold the load without live air pressure.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 155 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 SAIJ63AX155-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×155 | 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 SAIJ63AX155-50 Is Used
Machine Changeover
Dial in the 105-155 mm travel window during product size changeovers without replacing the cylinder or bolting on external stops.
Variable End Stops
Set precise retract positions for diverter arms on a conveyor line, tuning the mechanical stopper to match varying package depths.
Commissioning Tuning
Fine-tune the final end position during machine setup to perfect the pressing or clamping depth, avoiding costly mechanical rework.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX155-50 the Right Cylinder?
Choose this 63 mm bore cylinder when your application requires a 1559 N force at 0.5 MPa and significant on-the-fly stroke variability. If you need less force, stepping down to a 50 mm bore yields 982 N, while stepping up to an 80 mm bore provides 2513 N. The 50 mm adjustment window is ideal for product-size changeovers on a packaging line, allowing you to reposition the end stop without swapping the cylinder or adding external physical stops.
Because the nominal stroke is 155 mm, an external guide is not strictly required for side loads, but always ensure the load is supported if operating off-center. This SAIJ cylinder is dimensionally interchangeable per ISO 15552 and uses the reduced SAIJ mounting set: Basic, FA, LB, TC, FTC, TCM1, and TCM2 (omitting FB, CA, CB, and CR). If your process requires the cylinder to hold its position without continuous air pressure, you must use a SAIL pneumatic lock cylinder or an external BSAI clamp-lock instead of relying on the rear stopper.
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 SAIJ63AX155-50 FAQ
At 0.5 MPa, this 63 mm bore cylinder provides 1559 N of push force and 1402 N of pull force. It operates at a speed range of 30-800 mm/s.
The rear adjuster acts as a mechanical stop that lets you trim the effective stroke back by up to 50 mm, providing a usable travel window of 105 to 155 mm. It sets the end position but does not lock or hold the load without live air pressure.
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