Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-75
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-75 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 SAIJ63BX140-75
The AirTAC SAIJ63X140-75 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that permits a usable travel window of 65 to 140 mm. Delivering 1559 N of push force at 0.5 MPa, it handles robust linear motion tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible switch placement.
This unit is configured with a SUS304 stainless steel rod (option B) for superior corrosion resistance and a PT tapered port thread. The rear adjustment screw acts purely as a travel stop for fine-tuning end positions during commissioning; it does not lock or hold the load without live air pressure. For position-holding requirements, consider the SAIL or BSAI series.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-75 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-75 |
|---|---|
| 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 SAIJ63BX140-75
| 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 SAIJ63BX140-75 Is Used
Variable End-Stop Tuning
Dial in the exact retract position from 65 to 140 mm during machine commissioning to accommodate varying product lengths without swapping cylinders.
Changeover Adjustment
Quickly modify the effective stroke by up to 75 mm during product line changeovers, eliminating the need to bolt on external physical stops.
Corrosive Positioning
Leverage the SUS304 stainless steel rod for reliable linear positioning in environments where moisture or corrosive elements are present.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-75 the Right Cylinder?
Select this 63 mm bore cylinder when your application requires a 1559 N push force at 0.5 MPa and significant on-the-fly stroke trimming. Stepping down to a 50 mm bore yields 982 N, while an 80 mm bore provides 2513 N. Choose the SAIJ adjustable type over a fixed SAI when you need to dial in the exact end-stop during machine setup or product changeover without adding external stops. The standard PT port and G3/8 thread size match common pneumatic fittings.
Because the 140 mm stroke is well under the 300 mm side-load threshold, the 20 mm rod diameter handles standard loads easily. Mounting options are limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2. Note that this configuration omits the -S magnet; if electronic or reed sensing is needed, specify a -S model to utilize CMSE or DMSE switches.
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 SAIJ63BX140-75 FAQ
The rear adjuster screw acts as a mechanical stop that lets you shorten the effective stroke from its 140 mm nominal length down to 65 mm, providing a 75 mm adjustment window. It only sets the travel end and does not lock the load without continuous air pressure.
At 0.5 MPa operating pressure, the SAIJ63X140-75 provides 1559 N of push force and 1402 N of pull force. It can deliver up to 2182 N of push force at 0.7 MPa.
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