Airtac JSI Series Standard Cylinder JSI50X40
The AirTAC Airtac JSI Series Standard Cylinder JSI50X40 is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 40mm 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.
- BoreØ50 mm
- Stroke40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM18×1.5
- 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 JSI50X40
Delivering 982 N of push force at 0.5 MPa, this double-acting 50 mm bore cylinder is built around a JIS-standard profile that is physically shorter and more compact than an equivalent ISO 15552 unit. The extruded hard-anodized aluminum barrel removes external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life. Air connects via a G1/4 port, and the rod end uses an M18x1.5 thread.
Because this SKU lacks the -S magnet, it cannot accept CMSE or DMSE position switches. For sizing your task, plan for roughly 589 N of real work at 0.5 MPa, which translates to lifting about 50 kg vertically with a 2:1 safety margin. The unit runs at 30-800 mm/s, and if you need opposing rod movements or stroke adjustments, explore the JSID or JSIJ variants.
Airtac JSI Series Standard Cylinder JSI50X40 Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X40 |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 40 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M18×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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 JSI50X40
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×40 | 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 JSI50X40 Is Used
Package Diverting
Actuates a routing gate on a packaging conveyor, using the 40 mm stroke to push cartons onto a secondary belt with precise timing.
Clamp Actuation
Secures aluminum extrusions in a CNC machining center, providing steady clamping pressure without crowding the work envelope.
Parts Ejection
Ejects molded plastic components from a press bed, using the compact footprint to fit within tight machine guarding.
Is the Airtac JSI Series Standard Cylinder JSI50X40 the Right Cylinder?
If 982 N of push is excessive for your fixture, step down to the JSI40 bore which provides 628 N at 0.5 MPa; if you need more authority, the JSI63 offers 1559 N. Since this specific SKU has no -S suffix, it will not support magnetic sensors, so choose an -S version if your control system requires CMSE or DMSE switches for positioning. Mounting options include LB foot, FA/FB flange, CA/CB/CR clevis, TC/TCM1/TCM2 trunnion, or an I/Y/F/U rod knuckle. Note that air loss or a centered valve will cause the piston to drift, as the adjustable cushion only decelerates the rod near stroke end rather than locking it, so fit an external rod lock or pilot-operated check valve for suspended loads.
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 JSI50X40 FAQ
This 50 mm bore model uses a G1/4 air port and an M18x1.5 rod thread. It generates 982 N push and 825 N pull at 0.5 MPa, increasing to 1374 N push and 1154 N pull at 0.7 MPa, with a theoretical maximum of 200 kgf at 1.0 MPa.
The JIS-standard extruded profile is shorter and more compact than an ISO 15552 cylinder of the same bore, saving valuable machine space. It achieves this by using a hard-anodized aluminum barrel with no external rods, while still offering adjustable air cushions at both ends.
Authorized Export Seller
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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