Airtac JSI Series Standard Cylinder JSI40X35
The AirTAC Airtac JSI Series Standard Cylinder JSI40X35 is a genuine double acting JIS-standard air cylinder with a Ø40mm bore and 35mm 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
- Stroke35 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 JSI40X35
Generating 628 N of push force at 0.5 MPa, this double-acting 40 mm bore cylinder fits tight machinery where a standard ISO 15552 unit would be too long. The JIS-standard profile body uses an extruded, hard-anodized aluminum barrel that sheds wear, while a two-way piston seal retains grease for low-friction cycling. The G1/4 port and M14x1.5 rod thread keep plumbing and mounting standard.
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. Because this specific SKU lacks the -S magnet, it cannot host CMSE or DMSE position switches. If you need end-of-stroke detection, step up to the -S variant. The adjustable 20.5 mm air cushions at both ends absorb impact, and the 35 mm stroke moves at 30-800 mm/s.
Airtac JSI Series Standard Cylinder JSI40X35 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X35 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 35 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 JSI40X35
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 40 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×35 | 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 JSI40X35 Is Used
Small Part Ejection
Uses the 628 N push force to knock finished plastic parts out of an injection mold on a 35 mm stroke.
Package Diverting
Deploys a 35 mm stroke to push small cartons off a packaging line at speeds up to 800 mm/s.
Clamp Actuation
Holds lightweight aluminum extrusions in place for a drilling station using the 528 N pull force.
Is the Airtac JSI Series Standard Cylinder JSI40X35 the Right Cylinder?
If 377 N of safe working load is too high for your payload, the smaller JSI32 bore drops the 0.5 MPa push force to 402 N; conversely, stepping up to the JSI50 raises it to 982 N. This 35 mm stroke is well under the 300 mm threshold where side-load rod bending becomes a major concern, so standard LB foot or FA flange mounts will handle the motion easily. Remember that air loss or a centered valve will let the piston drift, as the cushions only decelerate at stroke end. For a suspended load, add 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 JSI40X35 FAQ
The JSI40X35 delivers 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 max of 128 kgf at 1.0 MPa. It uses a G1/4 air port and a 16 mm rod.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 40 mm bore. It uses an extruded aluminum barrel instead of external rods to save machine space.
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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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