Airtac JSI Series Standard Cylinder JSI40X350
The AirTAC Airtac JSI Series Standard Cylinder JSI40X350 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 JSI40X350
Delivering 628 N of push force at 0.5 MPa, this double-acting 40 mm bore cylinder provides a 350 mm stroke in a JIS-standard profile body that is noticeably shorter than an ISO 15552 unit of the same bore. The extruded hard-anodized aluminum barrel removes external rods to resist wear, while the two-way piston seal retains grease for low-friction life. Air connects via a G1/4 port, and adjustable cushions at both ends soften the 20.5 mm stroke-end deceleration.
Because this SKU lacks the -S magnet, it cannot host CMSE or DMSE position switches. For real-world sizing, plan for roughly 377 N of actual work at 0.5 MPa, which translates to lifting about 32 kg vertically with a 2:1 safety margin.
Airtac JSI Series Standard Cylinder JSI40X350 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI40X350 |
|---|---|
| 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 JSI40X350
| 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 JSI40X350 Is Used
Carton Push-off
Uses the 350 mm stroke to push corrugated cartons from a packaging conveyor, relying on the 628 N push force to overcome sliding friction.
Vertical Parts Lift
Elevates lightweight plastic tote bins between machinery tiers, safely handling loads near the 32 kg vertical lift threshold.
Component Sorting
Actuates a diverter gate on an assembly line, fitting the compact JIS profile into tight transfer station clearances.
Is the Airtac JSI Series Standard Cylinder JSI40X350 the Right Cylinder?
When sizing this 40 mm bore, dropping down to a JSI32 yields 402 N of push at 0.5 MPa, while stepping up to a JSI50 provides 982 N. This model carries a 350 mm stroke, so external guide rails should be used to prevent rod bending under side loads. Since this variant has no -S magnet, position sensing is unavailable; choose the -S version if you need CMSE or DMSE switches. Remember that standard air cushions only decelerate the piston and do not lock the rod—add an external pilot-operated check valve to hold loads vertically.
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 JSI40X350 FAQ
The 40 mm bore features a G1/4 port and a 16 mm rod. It generates 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.
The extruded profile barrel makes the body shorter and more compact than a same-bore ISO 15552 cylinder. This specific SKU lacks a magnet, so it cannot take sensors; you must specify the -S variant to use CMSE or DMSE switches in the side grooves.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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