Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 MFCJ20X80-20
Dial in exact end positions on-site with the AirTAC MFCJ20X80-20, a JIS-standard round-body mini cylinder featuring a 20 mm external stroke adjuster that shortens the 80 mm extend stroke down to 60 mm. It pairs this flexibility with a needle-set variable air cushion at both ends to absorb high-speed shocks. The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdowns while keeping the total body shorter than an equivalent ISO 6432 unit.
Operating at a 0.15 to 1.0 MPa pressure range via a 1/8" port, this double-acting bore generates 157 N of push force at 0.5 MPa. That translates to a safe working load of roughly 94 N, or enough to lift about 8 kg vertically with a 2:1 safety margin. Note this specific SKU lacks the -S magnet option, so it cannot host CMSG, DMSG or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MFCJ20X80-20
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MFCJ20X80-20 Is Used
Light Part Ejection
Tunes a 60-80 mm extend stroke to tap small plastic parts out of a mould, using the variable air cushion to prevent bounce at 800 mm/s.
Package Diverting
Adjusts the pusher stroke on the fly for mixed carton sizes, applying 157 N of push force to redirect light boxes smoothly.
Lab Test Fixturing
Dials in exact clamping travel for delicate test samples, using the needle cushion to guarantee soft contact without shock loads.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20 the Right Cylinder?
Choose the MFCJ20 when your application needs roughly 94 N of working force; if you need more push, the larger MFCJ25 delivers 245.3 N at 0.5 MPa. This 20 mm bore is ideal for high-speed changeovers where both the extend endpoint and end-of-stroke shock need tuning. The variable air cushion only decelerates the piston near the end caps—it does not lock or hold the load. If you need vertical position holding on air loss, add an external rod lock or pilot check valve.
Mounting options include LB foot, FA flange and TC trunnion (with no SDB or back-cover available on this adjustable build). Because this SKU ships without a magnet, you cannot mount position sensors; switch to an -S variant if you require CMSG, DMSG or EMSG switches.
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 MFCJ20X80-20 FAQ
This 20 mm bore cylinder uses a 1/8" port and delivers 157 N push / 131.9 N pull at 0.5 MPa, and 219.8 N push / 184.7 N pull at 0.7 MPa. The theoretical maximum force is 32 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so CMSG, DMSG or EMSG switches cannot be used. You must select an -S variant for sensing capabilities. The 20 mm adjuster shortens the extend stroke, and the variable air cushion handles deceleration.
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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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