Airtac JSI Series Standard Cylinder JSI40X125TC
The AirTAC Airtac JSI Series Standard Cylinder JSI40X125TC is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 125mm stroke, G1/4 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.
- BoreØ40 mm
- Stroke125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionAdjustable, 20.5 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 JSI40X125TC
Generating 628 N of push force at 0.5 MPa, this double-acting 40 mm bore unit delivers compact power for tight machinery layouts. As a JIS-standard profile cylinder, it is noticeably shorter than an ISO 15552 cylinder of the same bore, saving valuable machine space without sacrificing stroke length. The extruded hard-anodized aluminum barrel eliminates external rods, while a two-way piston seal retains grease for a long, low-friction service life.
Because this specific SKU lacks the -S magnet option, it cannot host CMSE or DMSE position sensors. For sizing your pneumatics, plan for roughly 377 N of real work at 0.5 MPa, which equates to lifting about 32 kg vertically with a 2:1 safety margin. The unit features a G1/4 port, an M14x1.5 rod thread, and adjustable air cushions at both ends to smooth out the 125 mm travel.
Airtac JSI Series Standard Cylinder JSI40X125TC Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X125TC |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 125 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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, 20.5 mm |
| Max standard stroke | Up to 1200 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 JSI40X125TC
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | 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 JSI40X125TC Is Used
Package Diverting
Actuates a routing gate on a packaging conveyor, using the 125 mm stroke to push cartons cleanly onto a secondary track at speeds up to 800 mm/s.
Small Part Clamping
Secures plastic housings during a ultrasonic welding process, applying up to 377 N of safe working force without distorting the component.
Bin Push-Off
Ejects filled totes from a palletizing cell, utilizing the TC trunnion mount to accommodate slight angular misalignment during the transfer.
Is the Airtac JSI Series Standard Cylinder JSI40X125TC the Right Cylinder?
If 628 N of push is excessive for your task, the smaller JSI32 bore offers 402 N at 0.5 MPa; conversely, stepping up to the JSI50 provides 982 N for heavier cycles. This model wears a TC trunnion mount, ideal for pivoting applications, and you can pair it with I, Y, F, or U rod knuckles. Since the stroke is 125 mm, side-load risks remain low, but always ensure your front-end tooling is guided to prevent rod bending.
Remember that a standard cylinder drifts when air is lost or the valve is centered. The adjustable cushion merely decelerates the piston near the end caps and does not function as a locking brake. To sustain a suspended load, install 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 JSI40X125TC FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At 0.7 MPa, push is 879 N and pull is 739 N. The theoretical maximum force is 128 kgf at 1.0 MPa. This 40 mm bore cylinder uses a G1/4 air port and features an M14x1.5 rod thread.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSE or DMSE switches. If you require position sensing, you must select the -S variant of this model. Additionally, while it is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same bore, it is not dimensionally interchangeable with ISO 15552.
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 JSI40X125TC
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.