Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-30 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 MFCJ20X80-30
Trim the extend stroke by up to 30 mm on site with the AirTAC MFCJ20X80-30, a JIS-standard round-body mini cylinder built for high-speed changeovers. The riveted SUS304 stainless barrel and aluminium covers form a compact body that is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length while resisting mild washdown. A needle variable air cushion at both ends soaks up end-of-stroke shock for smooth deceleration.
Operating at 0.15-1.0 MPa through a 1/8" port, this 20 mm bore double-acting actuator generates 157 N of push force at 0.5 MPa. That translates to a safe working load of roughly 94 N, or lifting about 8 kg vertically with a 2:1 safety margin. Note that this specific SKU lacks a magnet, meaning it cannot accept CMSG, DMSG, or EMSG position switches without upgrading to the -S variant.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-30 |
|---|---|
| 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 MFCJ20X80-30
| 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 MFCJ20X80-30 Is Used
Stroke Tuning Stations
Dial in the exact 50 to 80 mm extend position during automated tooling changeovers while the variable air cushion absorbs high-speed impact.
Light Part Insertion
Pushes small components with a 94 N safe working load, allowing operators to externally shorten the stroke for delicate trial fits without reprogramming the PLC.
Lab Testing Rigs
Ideal for compact test fixtures needing repeatable high-speed motion; the SUS304 barrel handles mild splashes while the needle cushion softens the end stop.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-30 the Right Cylinder?
When sizing these actuators, compare the output directly: this 20 mm bore provides 157 N of push force at 0.5 MPa, whereas stepping up to the MFCJ25 yields 245.3 N. Choose the smaller bore for lighter, high-speed tasks where space is tight, and the larger when moving heavier fixtures. Both feature the external adjuster to fine-tune the extend end position and needle cushions to tune deceleration.
Remember that the air cushion only decelerates the piston near the stroke end; it is not a brake. If your application must hold a vertical load during a sudden air loss, add an external rod lock or pilot-operated check valve. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover mount is available on this adjustable build).
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 MFCJ20X80-30 FAQ
This 20 mm bore cylinder features a 1/8" air port and an 8 mm rod. It delivers 157 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You would need the -S variant for position sensing. The external adjuster physically shortens the extend end by up to 30 mm but does not lock the piston mid-stroke.
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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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