Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50S 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 SAIJ63BX140-50S
The AirTAC SAIJ63X140-50-S is a double-acting, single-rod ISO 15552 profile cylinder featuring a rear stroke adjuster. It provides a 1559 Newton pull force at 0.5 MPa and uses a PT tapered G3/8 port. The built-in rear stopper allows you to dial back the 140 mm nominal travel by up to 50 mm, creating a highly versatile 90-140 mm usable stroke window for precise end-position tuning during commissioning.
This specific SKU ships with a SUS304 stainless steel rod (option B) for superior corrosion resistance and includes an integrated magnet (-S) for position sensing. It supports AirTAC CMSE reed and DMSE electronic solid-state switches mounted in the dual-side sensor grooves. The rear adjuster functions strictly as a travel stop to set deceleration limits, not as a load-holding lock; for position holding without live air pressure, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50S |
|---|---|
| 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 SAIJ63BX140-50S
| 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 SAIJ63BX140-50S Is Used
Product Changeover
Dial in the exact end-stop from 90 to 140 mm during format changes on a packaging line, avoiding cylinder swaps.
End-Position Tuning
Fine-tune the retract position at commissioning to perfect a pressing or clamping operation without external shims.
Variable End Stops
Set a precise deceleration point for a 1559 N pull load, using the rear adjuster to define the exact travel limit.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50S the Right Cylinder?
Select this 63 mm bore cylinder when your application requires 1559 N of pull force at 0.5 MPa (or 2182 N push at 0.7 MPa) alongside variable end-stop positioning. If you need less force, the 50 mm bore offers 825 N pull, while the 80 mm bore steps up to 2268 N. The adjustable stroke is chosen over a fixed SAI model when you need fine end-position tuning or rapid machine changeovers without physically swapping the cylinder or adding external mechanical stops.
To match this ISO 15552 interchangeable cylinder exactly, specify: 63 mm bore, 140 mm nominal stroke, 50 mm adjustment range, PT G3/8 port, SUS304 rod material, and the -S magnet option. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2, deliberately omitting FB, CA, CB, and CR brackets. Because the 140 mm stroke is under 300 mm, side-load risks are moderate, but the 20 mm rod diameter and M16x1.25 thread still require external guiding for heavy radial 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 SAIJ63BX140-50S FAQ
The rear adjusting screw acts as an external stopper, allowing you to shorten the effective travel by up to 50 mm. This creates a usable stroke window of 90 to 140 mm, enabling fine-tuning of the end position without changing the cylinder.
At 0.5 MPa, it provides 1559 N of pull force and 1402 N of push force. At 0.7 MPa, the push force increases to 2182 N.
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