Airtac JSI Series Standard Cylinder JSI50X55CB
The AirTAC Airtac JSI Series Standard Cylinder JSI50X55CB is a genuine double acting JIS-standard air cylinder with a Ø50mm bore and 55mm 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
- Stroke55 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 JSI50X55CB
Delivering 982 N of push force at 0.5 MPa, the AirTAC JSI50X55CB is a double-acting JIS-standard profile cylinder built for tight machinery layouts. It is notably shorter and more compact than an equivalent ISO 15552 bore, saving valuable envelope space. The extruded hard-anodized aluminum barrel omits external rods to resist wear, while the two-way piston seal retains grease for a long, low-friction service life. Equipped with a CB clevis mount, it handles a safe working load of about 589 N, which means it can lift roughly 50 kg vertically with a 2:1 safety margin.
This 50 mm bore unit features a 20 mm piston rod, an M18x1.5 rod-end thread, and a G1/4 air port. Because this specific SKU lacks the -S magnet suffix, it cannot accept CMSE or DMSE position sensors. The adjustable 20.5 mm air cushions at both ends smoothly decelerate the piston near the stroke limits across its 30-800 mm/s operating speed range.
Airtac JSI Series Standard Cylinder JSI50X55CB Technical Specifications
| Model | Airtac JSI Series Standard Cylinder JSI50X55CB |
|---|---|
| Series | JSI JIS-standard profile cylinder |
| Bore size | Ø50 mm |
| Stroke | 55 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 JSI50X55CB
| JSI | JIS-standard profile cylinder (double-acting type). |
|---|---|
| 50 | Bore size in mm (32 / 40 / 50 / 63 / 80 / 100 / 125). |
| ×55 | 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 JSI50X55CB Is Used
Packaging Machine Pusher
Uses the 982 N push force to positively index film rolls and cartons through a sealing station via the CB clevis pivot.
Diverting Arm Mechanism
Cycles at 30-800 mm/s to rapidly push parcels off a main belt, leveraging the compact profile to fit within tight side frames.
Vertical Parts Lift
Elevates approximately 50 kg of stacked components between conveyor tiers, relying on the hard-anodized barrel for smooth, low-friction operation.
Is the Airtac JSI Series Standard Cylinder JSI50X55CB the Right Cylinder?
When sizing this actuator, consider the neighboring bores: a 40 mm JSI provides 628 N of push at 0.5 MPa, while the 63 mm version steps up to 1559 N. If your machine experiences air loss or a centered valve, be aware the piston will drift, as the cushions only decelerate motion and do not function as a brake; incorporate an external rod lock or pilot-operated check valve for secure load holding. The integrated CB clevis is ideal for pivoting applications, and upgrading to an -S variant is necessary if your control system requires magnetic sensing.
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 JSI50X55CB FAQ
This 50 mm bore cylinder has a G1/4 air port and an M18x1.5 rod thread. It generates 982 N push and 825 N pull at 0.5 MPa, 1374 N push and 1154 N pull at 0.7 MPa, with a theoretical maximum of 200 kgf at 1.0 MPa.
It is a JIS-standard profile cylinder that is shorter and more compact than a same-bore ISO 15552 unit. Because this specific SKU lacks the -S magnet, it cannot accept CMSE or DMSE switches; you must select the -S variant for position sensing.
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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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