Airtac JSI Series Standard Cylinder JSI125X250TC
The AirTAC Airtac JSI Series Standard Cylinder JSI125X250TC is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 250mm stroke, G1/2 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.
- BoreØ125 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- CushionAdjustable, 33 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 JSI125X250TC
Delivering massive thrust in a compact footprint, the AirTAC JSI125X250TC is a JIS-standard double-acting profile cylinder. Its extruded hard-anodized aluminum barrel omits external rods, making the unit shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore. The internal two-way piston seal retains grease for long, low-friction life, while the G1/2 port feeds a 32 mm rod that pushes with 6136 N and pulls with 5734 N at 0.5 MPa.
For real-world sizing, plan for about 3682 N of actual work at 0.5 MPa, which safely lifts a 313 kg vertical load with a 2:1 margin. The adjustable 33 mm air cushions at both ends absorb impact at stroke extremes. Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position sensors; choose the -S variant if drop-in side-groove sensing is required.
Airtac JSI Series Standard Cylinder JSI125X250TC Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X250TC |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 33 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 (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 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 JSI125X250TC
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | 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 JSI125X250TC Is Used
Stamping Press Feed
Provides the 6136 N push force needed to shuttle heavy steel blanks into a mechanical stamping press.
Injection Mold Clamp
Secures large injection molding tooling halves using the TC trunnion mount to accommodate angular self-alignment.
Pallet Stopper Gate
Acts as a heavy-duty stopper arm on high-mass pallet conveyors, absorbing kinetic energy via its 33 mm cushions.
Is the Airtac JSI Series Standard Cylinder JSI125X250TC the Right Cylinder?
When sizing this 125 mm bore, step down to a 100 mm cylinder for 3927 N push at 0.5 MPa, or step up to a custom larger bore if you exceed the 6136 N capacity. This model includes a TC trunnion mount, allowing pivoting articulation for heavy machinery. Since air cushions only decelerate the piston near stroke end and do not act as a brake, an external rod lock or pilot-operated check valve is required to prevent drifting if air pressure drops. At a 250 mm stroke, side-load risks are moderate, so ensure rigid guidance on the driven part to avoid rod bending.
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 JSI125X250TC FAQ
At 0.5 MPa it pushes with 6136 N and pulls with 5734 N. At 0.7 MPa push is 8590 N and pull is 8028 N. The theoretical maximum force is 1251 kgf at 1.0 MPa. It uses a G1/2 air port and a 32 mm piston rod with an M27x2.0 thread.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 125 mm bore. Note that this specific SKU has no -S magnet, so it cannot support CMSE or DMSE magnetic sensors.
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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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