Airtac JSI Series Standard Cylinder JSI40X15STC
The AirTAC Airtac JSI Series Standard Cylinder JSI40X15STC is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 15mm 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
- Stroke15 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 JSI40X15STC
Generating 628 N of push force at 0.5 MPa, this double-acting 40 mm bore cylinder is built around a JIS-standard profile that is noticeably shorter and more compact than a same-bore ISO 15552 unit. The 15 mm stroke is a non-standard made-to-order dimension, tailored for very short travel motions. Its 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. A built-in magnet (-S) allows CMSE or DMSE sensors to drop directly into the side grooves for position detection.
For practical sizing, plan for about 377 N of real work at 0.5 MPa, which safely lifts roughly 32 kg vertically with a 2:1 margin. The unit features a G1/4 port, an M14x1.5 rod thread, and adjustable air cushions at both ends to decelerate the piston near stroke end.
Airtac JSI Series Standard Cylinder JSI40X15STC Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X15STC |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 15 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 JSI40X15STC
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×15 | 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 JSI40X15STC Is Used
Short-Stroke Clamping
Ideal for locking small electronic housings or PCBs in testing fixtures where a 15 mm travel and 377 N of safe working force securely hold the part without crushing it.
Gate Diverting
Provides a fast 15 mm poking action to deflect small hardware components down a conveyor chute, benefiting from the compact JIS profile to fit inside tight machinery frames.
Film Sealing Press
Delivers the precise 628 N push at 0.5 MPa required to bring a heat-sealing bar down onto packaging film for lightweight consumer goods.
Is the Airtac JSI Series Standard Cylinder JSI40X15STC the Right Cylinder?
When sizing this actuator, the 32 mm bore offers a smaller footprint with 402 N push at 0.5 MPa, whereas stepping up to the 50 mm bore provides 982 N if your application demands greater thrust. This specific SKU includes the -S magnet for drop-in CMSE/DMSE sensors and uses a TC trunnion mount for pivot articulation. Because the stroke is only 15 mm, side-load risks are minimal, but always verify alignment to prevent rod-binding. Remember that a standard cylinder drifts if air pressure is lost or the valve is centered; the cushion only decelerates travel and does not act as a brake. For suspended loads that must hold position, specify 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 JSI40X15STC FAQ
This 40 mm bore cylinder features a G1/4 air port and an M14x1.5 rod thread. The thrust outputs are 628 N push and 528 N pull at 0.5 MPa, 879 N push and 739 N pull at 0.7 MPa, with a theoretical maximum of 128 kgf at 1.0 MPa. It operates at speeds between 30-800 mm/s.
It uses a JIS-standard profile barrel that is shorter and more compact than an ISO 15552 cylinder of the same bore, saving valuable machine space. This unit is configured with a TC trunnion mount for pivoting applications, and the included -S magnet enables direct mounting of CMSE or DMSE position switches in the side grooves.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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