Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40 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 SAIJ63BX140-40
The AirTAC SAIJ63X140-40 is a double-acting ISO 15552 profile cylinder featuring a rear-mounted stroke adjuster. It provides a usable travel window of 100 to 140 mm, allowing you to dial back the nominal stroke by up to 40 mm during commissioning. Operating at 0.15 to 1.0 MPa, it delivers a push force of 1559 N and a pull force of 1402 N at 0.5 MPa. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch mounting.
This variant features a SUS304 stainless steel piston rod (code B) for superior corrosion resistance. The rod diameter is 20 mm with an M16x1.5 thread, designed to handle side loads effectively, though long unsupported strokes still require an external guide. The rear adjuster acts purely as a mechanical stop to set deceleration and end positions, so it does not hold the load without live air pressure. For load-holding requirements, consider the SAIL or BSAI series instead.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40 |
|---|---|
| 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 SAIJ63BX140-40
| 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 SAIJ63BX140-40 Is Used
Variable End Stops
Dial in the exact retract distance between 100 and 140 mm to accommodate varying material thicknesses without repositioning the cylinder.
Machine Changeover
Quickly adjust the rear stopper during product size transitions on a packaging line, reducing downtime and avoiding external stop hardware.
Commissioning Calibration
Fine-tune the end-of-stroke position during initial setup to perfect timing sequences and prevent mechanical interference.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-40 the Right Cylinder?
Select this 63 mm bore cylinder when your application requires precise end-position tuning without swapping components. The 40 mm adjustment window is ideal for product changeovers on a line, letting you fine-tune the retract stroke on the fly. If you need less force, stepping down to a 50 mm bore yields 825 N of pull force at 0.5 MPa. If your machine requires higher thrust, stepping up to an 80 mm bore provides 2268 N of pull force.
When replacing an ISO 15552 cylinder, match the 63 mm bore, 140 mm stroke, 40 mm adjustment, PT tapered port threads, and the desired mounting accessory. SAIJ supports a reduced mounting set including Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. This model does not include a magnet, so position sensing requires adding the -S option to use CMSE reed or DMSE electronic sensors.
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 SAIJ63BX140-40 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates a push force of 1559 N and a pull force of 1402 N. At its maximum rated pressure of 1.0 MPa, it can deliver up to 318 kgf.
The rear adjuster screw acts as a mechanical stop, allowing you to shorten the effective stroke from 140 mm down to 100 mm. It sets the travel end and deceleration point but does not lock or hold the load without continuous air pressure.
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