Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20S 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 MFCJ20X80-20S
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ20X80-20S, a JIS-standard round-body mini cylinder. The external adjuster shortens the extend stroke by up to 20 mm on-site, giving a usable 60-80 mm extend window, while the needle-set variable air cushion at both ends ensures smooth deceleration. Driven by an 8 mm rod through a 1/8" port, it delivers 157 N of push force at 0.5 MPa.
The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown environments. Because the -S suffix includes a built-in piston magnet, you can mount CMSG, DMSG, or EMSG switches for position sensing. For the same bore and stroke, this body is notably shorter than an ISO 6432 cylinder, saving valuable mounting length. It yields a safe working load of roughly 94 N, lifting about 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20S |
|---|---|
| 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 MFCJ20X80-20S
| 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 MFCJ20X80-20S Is Used
Light-Part Trial Fits
Use the 20 mm adjuster window to fine-tune the extend position during changeovers, gently pressing 8 kg assemblies into place while the air cushion prevents impact damage.
High-Speed Diverter Gates
Rapidly actuate lightweight routing flaps; the variable needle cushion absorbs the end-of-stroke shock to keep the 8 mm rod and mechanism quiet at high cycle rates.
Adjustable Push-off Pins
Eject small cartons on the fly by tuning the extend stroke 60-80 mm to match varying package depths without swapping the cylinder.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-20S the Right Cylinder?
When sizing this adjustable-stroke series, compare the real thrust figures: this 20 mm bore provides 157 N push at 0.5 MPa, while stepping up to the MFCJ25 yields 245.3 N. Choose the 20 mm bore for lighter, high-speed changeovers where exact stroke tuning and end-of-stroke shock absorption are critical. The 1/8" port and 30-800 mm/s speed range handle rapid cycles well.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover mount). Remember that the air cushion only decelerates the piston near stroke end—it is not a lock or brake. If the application requires the load to hold position on air loss, add an external rod lock or pilot-operated check valve, as the piston will drift otherwise.
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 MFCJ20X80-20S FAQ
This 20 mm bore cylinder features a 1/8" air port and an 8 mm rod. At 0.5 MPa it provides 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 on-site, yielding a 60-80 mm usable window, while the retract stroke remains full. The -S suffix means a piston magnet is built-in, allowing you to mount CMSG, DMSG, or EMSG sensors for position detection.
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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.
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Most inquiries answered within 7-8 hours.
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