Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 300mm stroke, 1/8" air ports and a SUS304 stainless-steel barrel for mildly corrosive environments. For the same bore and stroke it is shorter than an ISO 6432 cylinder, saving mounting space.
- BoreØ20 mm
- Stroke300 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
- 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 MFCJ Adjustable Mini Cylinder MFCJ20X300-20S
Dial in exact end positions on-site with this JIS-standard round-body mini cylinder, featuring a 20 mm external stroke adjuster that shortens the 300 mm extend travel down to 280 mm. As a double-acting actuator with a variable air cushion at both ends, it soaks up high-speed shock for smooth, quiet deceleration.
The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown, while the body is physically shorter than a comparable ISO 6432 unit to save mounting space. Driven by a 1/8" port and Ø8 mm rod, it delivers 157 N of push force at 0.5 MPa. The -S suffix denotes a built-in piston magnet for position sensing, and a practical safe working load is roughly 94 N, lifting about 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 | Variable air cushion, both ends |
| Max standard stroke | Up to 500 mm |
Specifications follow the official AirTAC MF/MFC (JIS-standard) datasheet. Barrel: SUS304 stainless steel; covers: aluminum alloy (round-body, riveted rolling-packed construction). Thread options: PT (blank) / G / NPT.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSG / DMSG / EMSG sensors. |
MF-family variants: MF / MFC (double acting ±cushion), MSF / MTF (single acting push / pull), MFD / MFCD (double rod ±cushion), MFJ / MFCJ (adjustable stroke ±cushion). Back covers CA / U / CM. Mounting LB / FA / SDB / TC.
Where the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S Is Used
Lightweight Component Seating
Fine-tune the 280-300 mm extend travel during trial fits to seat delicate electronic components without overshoot, relying on the needle cushion to absorb the 94 N safe working load smoothly.
Packaging Diverter Arm
Adjust the stroke by up to 20 mm on-site to accommodate varying carton sizes, while the variable air cushion ensures the diverter arm decelerates quietly at high cycling speeds.
Lab Automation Dispensing
Leverage the SUS304 stainless barrel for washdown resistance in lab environments, using the precise stroke adjustment to set exact fluid dispensing depths within the 8 kg vertical lift capacity.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S the Right Cylinder?
When sizing these adjustable-stroke units, compare the thrust directly: this 20 mm bore provides 157 N push at 0.5 MPa, whereas stepping up to an MFCJ25 yields 245.3 N. Choose the 20 mm bore for lighter, high-speed changeovers where exact stroke length and end-of-stroke shock both need field tuning via the needle cushion and external adjuster.
Mounting options include LB foot, FA flange, and TC trunnion (with no SDB or back-cover available on this build). Because the -S magnet is present, you can directly fit CMSG, DMSG, or EMSG sensors. Remember that the air cushion only decelerates the piston near stroke end—it is not a brake; if the load must be held on air loss, install an external rod lock or pilot check valve.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT / G / NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Back cover (CA/U/CM) & mount (LB/FA/SDB/TC)
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 Do not dismantle the riveted front/back covers.
- check Use correct back cover (CA/U/CM) & mount (LB/FA/SDB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-20S FAQ
This 20 mm bore cylinder features a 1/8" air port and an Ø8 mm piston rod. At 0.5 MPa it generates 157 N push and 131.9 N pull force; at 0.7 MPa it provides 219.8 N push and 184.7 N pull. The theoretical maximum force is 32 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm (usable range 280-300 mm), while the variable air cushion at both ends decelerates the piston near stroke end. The -S suffix indicates a built-in magnet, allowing you to mount CMSG, DMSG, or EMSG sensors for position detection.
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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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