Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40S
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40S 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 SAIJ63BX140-40S
The AirTAC SAIJ63X140-40-S is a double-acting, single-rod ISO 15552 profile cylinder equipped with a rear stroke adjuster. It provides a nominal 140 mm stroke that can be fine-tuned backward by up to 40 mm, creating a precise 100-140 mm usable travel window. Delivering 1559 N of push force at 0.5 MPa, it is built with a SUS304 stainless steel rod (code B) and features PT tapered ports sized at G3/8.
This adjustable-stroke design allows you to dial in the retract end-position during commissioning without swapping the cylinder or adding external stops. The extruded aluminum barrel includes sensor grooves on both sides, and the integrated -S magnet supports AirTAC CMSE reed and DMSE electronic solid-state switches for exact position detection.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40S Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40S |
|---|---|
| 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 SAIJ63BX140-40S
| 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 SAIJ63BX140-40S Is Used
Machine Changeover
Quickly adjust the 100-140 mm travel window during product size changeovers on a packaging line without replacing the cylinder.
End-Position Tuning
Fine-tune the retract end-stop at commissioning to dial in exact pressing or forming depths on the fly.
Variable End Stops
Set precise deceleration points for automated assembly tooling, leveraging the 36 mm cushioning to handle dynamic loads.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40S the Right Cylinder?
Choose this 63 mm bore when you need 1559 N push force at 0.5 MPa and a variable end-stop; if your application requires less force, step down to the 50 mm bore (982 N push), or step up to the 80 mm bore (2513 N push) for heavier loads. The rear adjuster acts purely as a travel stop to set deceleration, not as a lock; it will not hold a load without live air. For load-holding requirements without continuous air pressure, consider the SAIL (air-released lock) or BSAI (clamp-lock) variants.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 140 mm stroke, 40 mm adjustment range, G3/8 PT ports, and the -S magnet. The SAIJ mounting set includes Basic, FA, LB, TC, FTC, TCM1, and TCM2 options, omitting FB, CA, CB, and CR. The 20 mm rod diameter and M16x1.5 rod thread handle side loads well, but for the 140 mm stroke, always ensure proper external guiding to prevent rod binding.
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 SAIJ63BX140-40S FAQ
At 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 a peak push force of 318 kgf.
The rear adjuster screw allows you to shorten the effective stroke by up to 40 mm from the 140 mm nominal length, providing a usable travel window of 100-140 mm. The adjuster functions as a mechanical stop for end-position tuning and is not a locking device.
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