Airtac JSI Series Standard Cylinder JSI100X1250S
The AirTAC Airtac JSI Series Standard Cylinder JSI100X1250S is a genuine double acting JIS-standard air cylinder with a Ø100mm bore and 1250mm 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.
- BoreØ100 mm
- Stroke1250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM26×1.5
- 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 JSI100X1250S
Delivering 3927 N of push force at 0.5 MPa, this double-acting 100 mm bore JIS-standard profile cylinder is engineered for heavy-duty automation. Its extruded hard-anodized aluminum barrel contains no external rods, making the unit shorter and more compact than an ISO 15552 cylinder of the same bore. The internal two-way piston seal retains grease exceptionally well, ensuring low-friction operation over a long service life.
Because this 1250 mm stroke variant includes the -S magnet, it readily accepts CMSE or DMSE electronic switches that drop directly into the side sensor grooves. Plan for roughly 2356 N of actual work at 0.5 MPa, which translates to lifting about 200 kg vertically with a 2:1 safety margin. The unit features a G1/2 port, an M26x1.5 rod thread, and adjustable air cushions at both ends to smooth out deceleration.
Airtac JSI Series Standard Cylinder JSI100X1250S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI100X1250S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 1250 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M26×1.5 |
| 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, 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3525 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 JSI100X1250S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 100 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×1250 | 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 JSI100X1250S Is Used
Pallet Transfer Line
Pushes heavy loaded pallets between machining centers using its 3927 N push force at 0.5 MPa, while the 1250 mm stroke covers the full conveyor width.
Automated Warehousing
Acts as a main actuator for vertical lifting gates or heavy pusher arms, easily managing loads up to 200 kg with a 2:1 safety margin.
Large Press Feed
Feeds heavy steel blanks into a forming press, relying on the 33 mm adjustable air cushions to absorb kinetic energy at the end of the 1250 mm extension.
Is the Airtac JSI Series Standard Cylinder JSI100X1250S the Right Cylinder?
Choosing this 100 mm bore makes sense when a 63 mm bore (providing 1559 N push at 0.5 MPa) lacks the necessary muscle, but a 125 mm bore is simply too bulky. When sizing vertically, remember that a standard pneumatic cylinder will drift and drop its load if air pressure is lost or the valve is centered; the adjustable cushion only decelerates the piston near the end of stroke and acts purely as a brake. To safely hold a suspended load, you must integrate an external rod lock or a pilot-operated check valve into your circuit.
At 1250 mm of extension, the 32 mm piston rod is highly susceptible to side-loading and bending forces. You must use external guide rails to support the payload and prevent rod deflection. The built-in -S magnet pairs perfectly with CMSE or DMSE sensors for end-of-stroke confirmation, and the cylinder mounts via LB foot, FA/FB flange, CA/CB clevis, or TC trunnion hardware.
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 JSI100X1250S FAQ
This 100 mm bore model uses a G1/2 air port and an M26x1.5 rod thread. It generates 3927 N push and 3574 N pull at 0.5 MPa, 5497 N push and 5003 N pull at 0.7 MPa, with a theoretical maximum of 801 kgf at 1.0 MPa.
The JIS-standard extruded aluminum barrel removes the need for external tie rods, making the cylinder shorter and more compact than an ISO 15552 cylinder of the same bore while retaining dual-side sensor grooves and adjustable end cushions.
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.
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