Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø63mm bore and 140mm 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
- Stroke140 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM16×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50
The AirTAC SAIJ63X140-50 is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a nominal 140 mm stroke that can be dialed back by up to 50 mm, creating a precise 90-140 mm usable travel window for fine-tuning end positions at commissioning. Equipped with a G3/8 port and a 20 mm rod, it delivers 1559 N of pull force at 0.5 MPa, making it robust enough for moderate industrial handling.
This variant features a SUS420J2 stainless steel rod (material code A) for enhanced corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting. The rear screw functions strictly as a travel stop to set deceleration, not as a load-holding lock; maintaining position requires continuous live air.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 140 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 SAIJ63AX140-50
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×140 | 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 SAIJ63AX140-50 Is Used
Changeover Adjustment
Dial in the 90-140 mm retract distance during product size changeovers without replacing the cylinder or adding mechanical shims.
End-Stop Tuning
Fine-tune the final resting position during machine commissioning to perfectly align tooling using the rear adjustment screw.
Variable Diverter
Adjust the stroke length on a conveyor diverter arm to accommodate different package widths on the fly.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63AX140-50 the Right Cylinder?
Choose this 63 mm bore when a 50 mm bore provides insufficient thrust (982 N push at 0.5 MPa) but an 80 mm bore is excessive. The 50 mm adjustment range is ideal for machines processing varying product sizes, allowing operators to change the retract end-stop without swapping cylinders or adding external stops. For fixed-position tasks without changeover needs, a standard SAI cylinder is simpler.
When specifying an ISO 15552 replacement, match the 63 mm bore, 140 mm stroke, 50 mm adjuster, PT tapered port threads, and the desired mounting set (Basic, FA, LB, TC, FTC, TCM1, TCM2). Because the stroke is 140 mm, ensure external guiding if the load is heavy or subject to lateral forces, as the rod is not designed to absorb high side loads.
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 SAIJ63AX140-50 FAQ
The rear adjuster acts as an external stopper that shortens the effective stroke by up to 50 mm. This gives the cylinder a usable travel window of 90 to 140 mm, allowing you to set the exact retract end-position without changing the cylinder itself.
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1559 N of pull force and 2182 N of push force at 0.7 MPa. It operates at speeds between 30 and 800 mm/s.
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