Airtac JSI Series Standard Cylinder JSI125X125TC
The AirTAC Airtac JSI Series Standard Cylinder JSI125X125TC is a genuine double acting JIS-standard air cylinder with a Ø125mm bore and 125mm 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
- Stroke125 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 JSI125X125TC
Delivering massive thrust in a tight footprint, this double-acting JIS-standard profile cylinder is notably shorter than an equivalent ISO 15552 unit of the same 125 mm bore. It generates 6136 N of push force and 5734 N of pull at 0.5 MPa, making it ideal for heavy-duty machinery. 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.
Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches. For sizing practical payloads, plan for roughly 3682 N of real work at 0.5 MPa, which translates to lifting about 313 kg vertically with a 2:1 safety margin. The unit features a G1/2 port, an M27x2.0 rod thread, and a 33 mm adjustable air cushion at both ends to decelerate the piston smoothly.
Airtac JSI Series Standard Cylinder JSI125X125TC Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI125X125TC |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø125 mm |
| Stroke | 125 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 JSI125X125TC
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 125 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×125 | 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 JSI125X125TC Is Used
Stamping Press Feeders
Pushes heavy coil stock into a mechanical press with 6136 N of force, relying on the TC trunnion to absorb pivot stresses during rapid 125 mm strokes.
Injection Mold Ejection
Provides robust ejection force for large automotive plastic molds, moving roughly 313 kg of part and tooling weight vertically per cycle.
Pallet Positioning Gates
Actuates heavy-duty lane diverters on conveyor lines, using the compact JIS profile to fit within tight machinery frames without sacrificing power.
Is the Airtac JSI Series Standard Cylinder JSI125X125TC the Right Cylinder?
As the largest bore in the JSI series, there is no larger standard option if 6136 N at 0.5 MPa is insufficient; stepping down to the 100 mm bore drops the push force to 3927 N. The TC trunnion mount specified here provides a pivoting centerline support, which is essential for managing the high side-loads this cylinder can generate. Since this stroke is 125 mm, standard rod bending is minimal, but always guide the load externally for stability.
Note that air pressure alone will not hold a load if supply is lost or the valve is centered, as the piston will drift and the cushion only decelerates near stroke end. To prevent dropping a suspended mass, install an external rod lock or a pilot-operated check valve. Additionally, because this model has no -S suffix, magnetic sensing is not supported.
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 JSI125X125TC FAQ
At 0.5 MPa it provides 6136 N push and 5734 N pull. At 0.7 MPa it provides 8590 N push and 8028 N pull. The theoretical maximum force is 1251 kgf at 1.0 MPa. This 125 mm bore cylinder uses a G1/2 port, an M27x2.0 rod thread, and operates at speeds of 30-500 mm/s.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore. The TC trunnion mount offers centerline pivoting. Note that this specific SKU lacks a magnet, so it cannot use CMSE or DMSE sensors, and it requires an external rod lock to hold loads safely.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC JSI Cylinders
Request a Quote for Airtac JSI Series Standard Cylinder JSI125X125TC
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.