Airtac JSI Series Standard Cylinder JSI40X350SH
The AirTAC Airtac JSI Series Standard Cylinder JSI40X350SH 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 JSI40X350SH
Generating 628 N of push force at 0.5 MPa, this double-acting 40 mm bore JIS-standard profile cylinder is purpose-built for tight machinery envelopes. Its extruded hard-anodized aluminum barrel omits external rods, making the unit significantly shorter and more compact than an ISO 15552 cylinder of the same bore. The -H designation equips the NBR piston and TPU buffer gaskets with a Viton (FKM) high-temperature seal variant, extending service life in heated environments.
A 350 mm stroke provides ample travel for indexing and sorting tasks, while the integrated -S piston magnet allows CMSE or DMSE reed and electronic switches to drop directly into the side sensor grooves. The two-way piston seal retains grease for low-friction operation over countless cycles. Plan for a safe working load of about 377 N, which means it can reliably lift roughly 32 kg vertically with a 2:1 safety margin. Air connections use a G1/4 port, and the 16 mm rod features an M14x1.5 thread.
Airtac JSI Series Standard Cylinder JSI40X350SH Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X350SH |
|---|---|
| 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 JSI40X350SH
| 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 JSI40X350SH Is Used
Packaging Line Diverter
Pushes cartons onto auxiliary lanes at 0.5 MPa, utilizing the 628 N push rating to deflect heavy goods without overwhelming the 40 mm bore envelope.
Textile Loom Tensioner
Uses the 350 mm stroke to position fabric guides, while the high-temp Viton seals withstand the ambient heat generated by drying ovens.
Palletizer Stop Gate
Deploys the full 350 mm travel to halt incoming pallets, relying on the -S magnet and DMSE sensors to confirm gate position for the PLC.
Is the Airtac JSI Series Standard Cylinder JSI40X350SH the Right Cylinder?
When sizing this actuator, stepping down to a JSI32 bore drops the 0.5 MPa push force to 402 N, whereas stepping up to a JSI50 raises it to 982 N. Because this 350 mm stroke is relatively long, carefully support the load to prevent rod bending and excessive side-loading; an external guide rail is highly recommended to preserve bearing life. Note that the adjustable 20.5 mm air cushions only decelerate the piston near the stroke ends and do not function as a brake. If your application must hold a vertical load when air is lost or the valve is centered, you must add an external rod lock or a pilot-operated check valve to prevent drifting.
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 JSI40X350SH FAQ
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it provides 879 N push and 739 N pull. The theoretical maximum force is 128 kgf at 1.0 MPa. The air port size is G1/4.
The JSI series follows JIS standards and uses an extruded hard-anodized aluminum barrel without external rods. This profile construction makes it shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore, saving valuable machine space.
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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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Most inquiries answered within 7-8 hours.
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