Airtac JSI Series Standard Cylinder JSI40X350H
The AirTAC Airtac JSI Series Standard Cylinder JSI40X350H is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 350mm 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
- Stroke350 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 JSI40X350H
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 a same-bore ISO 15552 unit. 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. This specific -H variant utilizes high-temperature Viton (FKM) seals to endure hotter environments, and the G1/4 port matches the 40 mm bore specification.
Because this SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches. For practical sizing, plan for about 377 N of real work at 0.5 MPa, which translates to lifting roughly 32 kg vertically with a 2:1 safety margin. The adjustable 20.5 mm air cushions at both ends decelerate the piston smoothly, but remember they are not brakes; if air is lost, the rod drifts.
Airtac JSI Series Standard Cylinder JSI40X350H Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X350H |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 350 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 JSI40X350H
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×350 | 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 JSI40X350H Is Used
Packaging Line Diverter
Pushes light cartons at 30-800 mm/s on a heat-shrink wrapper, where the 628 N push force easily handles the diverting friction and the Viton seals withstand ambient heat.
Palletizing Stop Gate
Acts as a 350 mm stroke stop gate for pallet infeed, using the hard-anodized barrel to survive occasional incidental impacts in high-traffic logistics zones.
Small Press Ejector
Ejects formed plastic parts from a heated mold area, relying on the -H FKM seals to maintain integrity near ambient machine heat without swelling.
Is the Airtac JSI Series Standard Cylinder JSI40X350H the Right Cylinder?
When sizing this 40 mm bore, stepping down to a 32 mm JSI drops the 0.5 MPa push force to 402 N, while moving up to a 63 mm bore increases it substantially to 1559 N. For this 350 mm stroke, the M14x1.5 rod is highly susceptible to side-load bending; always use an external guide rail to prevent premature seal failure and rod damage. Because this configuration has no -S magnet, you must choose the -S variant if your application requires drop-in CMSE or DMSE sensors for end-of-stroke detection. Furthermore, a standard cylinder drifts when air is exhausted, so fit an external rod lock or pilot-operated check valve to suspend a vertical load safely.
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 JSI40X350H FAQ
This 40 mm bore cylinder features a G1/4 port and an M14x1.5 rod thread. The thrust output is 628 N push and 528 N pull at 0.5 MPa, increasing to 879 N push and 739 N pull at 0.7 MPa. The theoretical maximum force is 128 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so CMSE or DMSE switches cannot be used. You must select the -S variant (JSI40X350H-S) to enable drop-in sensor mounting via the side grooves.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
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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