Airtac JSI Series Standard Cylinder JSI50X550S
The AirTAC Airtac JSI Series Standard Cylinder JSI50X550S is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 550mm 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
- Stroke550 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 JSI50X550S
Delivering 982 N of push force at 0.5 MPa, the AirTAC JSI50X550S is a double-acting JIS-standard profile cylinder built for compact machinery. Its extruded hard-anodized aluminum barrel omits external rods, making the unit shorter and more compact than an ISO 15552 cylinder of the same 50 mm bore. The G1/4 port and M18x1.5 rod thread handle the 30-800 mm/s speed range, while a heterogeneous two-way piston seal retains grease for low-friction life.
With a 550 mm stroke, plan for about 589 N of real work at 0.5 MPa, which lifts roughly 50 kg vertically with a 2:1 safety margin. The -S suffix means a piston magnet is installed, allowing CMSE or DMSE sensors to drop directly into the side grooves for position detection. Adjustable 20.5 mm air cushions at both ends decelerate the rod near stroke end, though a plain cylinder drifts if air is lost.
Airtac JSI Series Standard Cylinder JSI50X550S Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X550S |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 550 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 JSI50X550S
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×550 | 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 JSI50X550S Is Used
Carton Diverting
Pushes packages across a 550 mm transfer gap with 982 N of 0.5 MPa thrust, relying on the compact profile to fit tight conveyor frames.
Vertical Parts Lift
Raises 50 kg wip assemblies between machine tiers using the 2:1 safety margin, benefiting from the grease-retaining seal for continuous duty.
Long-Reach Clamping
Extends 550 mm to secure large sheet metal panels, using external guides to prevent rod bending during the clamping cycle.
Is the Airtac JSI Series Standard Cylinder JSI50X550S the Right Cylinder?
When sizing this 50 mm bore, stepping down to a 40 mm bore drops the 0.5 MPa push force to 628 N, while stepping up to a 63 mm bore raises it to 1559 N. Because this model features a 550 mm stroke, external guides are highly recommended to prevent rod bending and absorb side loads during long extensions. The -S magnet matches CMSE/DMSE switches perfectly. Remember that air cushions only decelerate the piston; they do not lock the load, so fit an external rod lock or pilot-operated check valve if the machine loses air pressure.
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 JSI50X550S FAQ
At 0.5 MPa it pushes 982 N and pulls 825 N. At 0.7 MPa it pushes 1374 N and pulls 1154 N. The theoretical maximum is 200 kgf at 1.0 MPa. The air port is G1/4.
It is a JIS-standard profile cylinder that is shorter and more compact than an ISO 15552 cylinder of the same 50 mm bore, saving machine space. The -S magnet allows CMSE/DMSE switches to drop into the side grooves.
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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