Airtac JSI Series Standard Cylinder JSI63X250FB
The AirTAC Airtac JSI Series Standard Cylinder JSI63X250FB is a genuine double acting JIS-standard air cylinder with a Ø63mm bore and 250mm stroke, G3/8 air ports and adjustable end cushioning. Its no-tie-rod, hard-anodized profile barrel is more compact than an ISO 15552 cylinder of the same bore — a space-saver on tight machines.
- BoreØ63 mm
- Stroke250 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM18×1.5
- CushionAdjustable, 29 mm
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac JSI Series Standard Cylinder JSI63X250FB
Delivering 1559 N of push force at 0.5 MPa, this double-acting JIS-standard profile cylinder saves valuable machine space by being noticeably shorter than a same-bore ISO 15552 unit. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life. Plan for roughly 935 N of actual work at 0.5 MPa, which translates to lifting about 79 kg vertically with a 2:1 safety margin.
This specific SKU lacks the -S magnet, so it cannot host CMSE or DMSE sensors without upgrading to the magnet-equipped variant. Air connects via a G3/8 port, and the FB front flange provides a robust mounting interface for your fixture.
Airtac JSI Series Standard Cylinder JSI63X250FB Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI63X250FB |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø63 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M18×1.5 |
| 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, 29 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC JSI (JIS standard) datasheet. Confirm against the product label before installation. Thread options: PT (blank) / G. Barrel: hard-anodized aluminum profile (no tie rods).
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 JSI Series Standard Cylinder JSI63X250FB
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 63 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensors. |
JSI-family variants: JSI (double acting), JSID (double rod), JSIJ (adjustable stroke). Mounting: LB / FA / FB / CA / CB / CR / TC / TCM1 / TCM2. Thread PT (blank) / G.
Where the Airtac JSI Series Standard Cylinder JSI63X250FB Is Used
Package Diverting
Actuates a routing gate on a logistics conveyor, using the 250 mm stroke to push parcels cleanly onto adjacent sorting lanes.
Pallet Stop Arm
Functions as a heavy-duty stopper on a roller accumulator, holding back loaded pallets with its 1559 N push capacity at 0.5 MPa.
Press Tool Ejection
Ejects formed aluminum brackets from a stamping die, relying on the hard-anodized barrel to withstand repetitive industrial impacts.
Is the Airtac JSI Series Standard Cylinder JSI63X250FB the Right Cylinder?
When sizing this 63 mm bore, the smaller JSI50 offers 982 N of push at 0.5 MPa, whereas stepping up to the JSI80 yields 2513 N, giving you clear room to adjust if your load changes. Because this is a 250 mm stroke, ensure your guiding mechanism handles any side-load to prevent rod bending and premature seal wear.
Note that a standard cylinder drifts if air pressure drops or the valve centers; the adjustable 29 mm cushions only decelerate the piston near stroke ends rather than locking it. To suspend a load safely mid-stroke, fit an external rod lock or a pilot-operated check valve.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ 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 Set cushions to minimum, then release gradually.
- check Use correct mounting accessory (LB/FA/FB/CA/CB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac JSI Series Standard Cylinder JSI63X250FB FAQ
At 0.5 MPa it provides 1559 N of push and 1402 N of pull force. At 0.7 MPa the output rises to 2182 N push and 1962 N pull, with a theoretical maximum of 318 kgf at 1.0 MPa. The air port is G3/8, the rod is Ø20 mm with an M18x1.5 thread, and it operates at speeds between 30 and 800 mm/s.
No, because this specific SKU does not include the -S magnet. To use CMSE or DMSE magnetic switches in the side sensor grooves, you must select the -S variant of this JIS profile cylinder.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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