Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50
The AirTAC Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50 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 SAIJ63BX140-50
The AirTAC SAIJ63X140-50 is a double-acting 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, yielding a usable travel window of 90 to 140 mm. This allows precise end-position tuning at commissioning without swapping hardware. Built with a SUS304 stainless steel rod and PT tapered ports, it generates 1559 N of push force and 1402 N of pull force at 0.5 MPa.
Equipped with variable air cushions at both ends, this 63 mm bore unit operates at speeds from 30 to 800 mm/s. The rear adjustment screw functions strictly as a travel stop to decelerate the piston, not as a load-holding lock. For applications requiring position maintenance without live air pressure, an external rod lock or related SAIL pneumatic lock cylinder is required.
Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50 Technical Specifications
| Model | Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50 |
|---|---|
| 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 SAIJ63BX140-50
| 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 SAIJ63BX140-50 Is Used
Product Changeover
Dial the stroke back from 140 mm to 90 mm during format size changes on a packaging line, using the rear adjuster to set new end positions without changing the cylinder.
Machine Setup
Fine-tune the final retract position during commissioning to perfect the alignment of a 63 mm bore tooling head delivering 1559 N of push force.
Variable End Stops
Use the 50 mm adjustment window to vary the clamping depth on machined parts, relying on the SUS304 stainless steel rod for corrosion resistance.
Is the Airtac SAIJ63 Adjustable Stroke Air Cylinder SAIJ63BX140-50 the Right Cylinder?
Choose this 63 mm bore when you need 1559 N push force at 0.5 MPa, stepping up from a 50 mm bore that provides 982 N, or down from an 80 mm bore yielding 2513 N. The 50 mm adjustment range is ideal for product-size changeovers on a packaging line, allowing operators to dial in the exact 90 to 140 mm end-stop without adding external stops. When replacing an ISO 15552 cylinder, match the 63 mm bore, 140 mm stroke, PT port thread, and mounting set.
The SAIJ mounting options include Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting FB, CA, CB, and CR. The 20 mm rod diameter with an M16x1.5 thread handles moderate side loads well, though any stroke approaching 300 mm or greater requires an external guide rail to prevent rod binding. The adjuster only sets the travel end and must not be relied upon to hold loads pneumatically.
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 SAIJ63BX140-50 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder generates 1559 N of push force and 1402 N of pull force. At the maximum 1.0 MPa pressure, it achieves a push force of 318 kgf.
The rear adjuster screw acts as a mechanical stop that shortens the retract stroke by up to 50 mm. This creates a usable travel window of 90 to 140 mm, allowing you to trim the end position without adding external stops. It is a travel stop, not a lock.
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