Airtac JSI Series Standard Cylinder JSI63X250
The AirTAC Airtac JSI Series Standard Cylinder JSI63X250 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 JSI63X250
Delivering 1559 N of push force at 0.5 MPa, the AirTAC JSI63X250 is a double-acting JIS-standard profile cylinder built for tight machinery layouts. It is noticeably shorter and more compact than an ISO 15552 cylinder of the same 63 mm bore, saving valuable real estate without sacrificing power. The extruded hard-anodized aluminum barrel eliminates external rods to resist wear, while the heterogeneous two-way piston seal retains grease for a long, low-friction service life. Because this SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches.
For practical sizing, plan for about 935 N of real work at 0.5 MPa, which safely lifts roughly 79 kg vertically with a 2:1 margin. The G3/8 air port and M18x1.5 rod thread handle the 30-800 mm/s speed range efficiently. Adjustable 29 mm air cushions at both ends absorb impact energy, and you can pair the unit with LB foot, FA/FB flange, CA/CB/CR clevis, TC/TCM1/TCM2 trunnion mounts, or I/Y/F/U rod knuckles. If you need opposing synchronous rods or custom travel endpoints, consider the related JSID or JSIJ variants.
Airtac JSI Series Standard Cylinder JSI63X250 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI63X250 |
|---|---|
| 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 JSI63X250
| 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 JSI63X250 Is Used
Pallet Diverters
Pushes 20 kg pallets sideways at 30-800 mm/s using 1559 N of thrust, with the 29 mm cushion smoothly stopping the 250 mm travel.
Vertical Crate Lifter
Hoists packaged crates weighing up to 79 kg in pick-and-place cells, benefiting from the compact JIS profile to fit tight vertical spaces.
Press Ejection
Ejects formed metal parts from a 50-ton press, where the hard-anodized barrel shrugs off debris and the 935 N safe load clears the die.
Is the Airtac JSI Series Standard Cylinder JSI63X250 the Right Cylinder?
When sizing this 63 mm bore, dropping down to a JSI50X250 yields 982 N of push at 0.5 MPa, whereas stepping up to a JSI80X250 provides 2513 N. Choose the 80 mm option if your dynamic load consistently exceeds the 935 N safe working threshold of this model. Since this specific SKU has no -S suffix, it cannot host magnetic sensors; you must physically verify end-of-stroke positions or upgrade to the -S variant for CMSE/DMSE switches.
With a 250 mm stroke, mounting orientation heavily influences bearing wear. Always guide the load externally to prevent rod bending and premature seal failure. Furthermore, standard double-acting cylinders drift when air is lost or the valve is centered. The end cushions only decelerate the piston near stroke limits and act purely as buffers, so install an external rod lock or pilot-operated check valve if your application requires suspended load holding.
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 JSI63X250 FAQ
The JSI63X250 delivers 1559 N push and 1402 N pull at 0.5 MPa, 2182 N push and 1962 N pull at 0.7 MPa, with a theoretical max of 318 kgf at 1.0 MPa. It features a G3/8 air port, an M18x1.5 rod thread, and a 20 mm piston rod.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 63 mm bore. It does not hold position if air pressure drops; the cushions only decelerate the piston near the ends, so use a rod lock for suspended loads.
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Standard models are processed and dispatched in 3-5 business days.
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