Airtac JSI Series Standard Cylinder JSI40X1050STC
The AirTAC Airtac JSI Series Standard Cylinder JSI40X1050STC is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 1050mm 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
- Stroke1050 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 JSI40X1050STC
Delivering 628 N of push force at 0.5 MPa, this double-acting JIS-standard profile cylinder saves valuable machine space by being noticeably shorter than an equivalent ISO 15552 unit of the same 40 mm bore. 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 the code includes an S, a built-in magnet enables CMSE or DMSE sensors to drop directly into the side grooves for position detection.
With a 1050 mm stroke, this is a made-to-order non-standard length that exceeds the 1200 mm maximum standard stroke limit for this bore. For real-world sizing, plan for about 377 N of actual work at 0.5 MPa, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin. The unit features a G1/4 port, an M14x1.5 rod thread, and 20.5 mm adjustable air cushions at both ends to smooth out deceleration.
Airtac JSI Series Standard Cylinder JSI40X1050STC Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X1050STC |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 1050 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 JSI40X1050STC
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×1050 | 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 JSI40X1050STC Is Used
Long-Reach Diversion
Pushes packages across a wide sorting conveyor over the full 1050 mm travel, relying on the 628 N push force to deflect heavy cartons without stalling.
High-Bay Extraction
Extracts totes from deep shelving racks in automated storage systems, where the compact JIS profile minimizes the space required at the back of the machine.
Film Roll Feeding
Feeds large packaging film rolls into a wrapping station, using the built-in magnet and DMSE sensors to confirm material supply at the extended position.
Is the Airtac JSI Series Standard Cylinder JSI40X1050STC the Right Cylinder?
When sizing this 40 mm bore, stepping down to a 32 mm bore drops the 0.5 MPa push force to 402 N, while stepping up to a 50 mm bore increases it to 982 N. The included TC trunnion mount provides a pivoting centerline interface that accommodates the slight angular misalignment inherent to long-stroke actuators. Because this 1050 mm stroke is exceptionally long, you must support the load with an external guide to prevent rod bending and premature seal wear caused by side loads.
Note that a standard pneumatic cylinder will drift and drop its load if air pressure is lost or the valve is centered. The adjustable cushions only decelerate the piston near the end caps and do not act as a locking brake. To safely hold a vertical 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 JSI40X1050STC FAQ
This 40 mm bore cylinder uses a G1/4 port and an M14x1.5 rod thread. The thrust ratings are 628 N push and 528 N pull at 0.5 MPa, 879 N push and 739 N pull at 0.7 MPa, and a theoretical maximum of 128 kgf at 1.0 MPa.
The JIS extruded profile is shorter and more compact than an ISO 15552 cylinder of the same bore, saving space. The TC trunnion mount allows pivoting, which is critical for a 1050 mm stroke to handle mounting tolerances, while the -S magnet enables CMSE/DMSE sensors.
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1-Year Warranty
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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Most inquiries answered within 7-8 hours.
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