Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-100S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-100S 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 MFCJ20X80-100S
Dial in exact extend distances on-site with the AirTAC MFCJ20X80-100S, a JIS-standard round-body mini cylinder featuring a 100 mm adjustable window. Its external adjuster shortens the extend stroke from the nominal 80 mm down to zero, while needle variable air cushions at both ends soak up high-speed end-of-stroke shock. The riveted SUS304 stainless barrel and aluminium covers form a compact body that is physically shorter than an equivalent ISO 6432 unit, saving valuable mounting space.
Driven by filtered air through a 1/8" port, this double-acting 20 mm bore generates 157 N of push force at 0.5 MPa. With the built-in -S magnet enabled, you can mount CMSG, DMSG, or EMSG switches for position sensing. For practical sizing, expect a safe working load of roughly 94 N (about 60% of the 0.5 MPa push figure), meaning it lifts about 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-100S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-100S |
|---|---|
| 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 MFCJ20X80-100S
| 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 MFCJ20X80-100S Is Used
Light-Part Trial Fits
Fine-tune the extend stroke by up to 100 mm during machine changeovers to perfectly seat delicate 8 kg components without crashing.
High-Speed Diverting
Use the needle air cushions to silently absorb end-of-stroke shock when pushing light packages at speeds up to 800 mm/s.
Lab Positioning
Leverage the compact JIS stainless body and CMSG sensors for precise, washdown-resistant actuation in tight laboratory enclosures.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-100S the Right Cylinder?
When choosing between bores, the 20 mm MFCJ delivers 157 N push at 0.5 MPa, whereas stepping up to the MFCJ25 provides 245.3 N. Pick the 20 mm if your high-speed changeover requires only light actuation, and reserve the larger bore for heavier masses. Both options share the 30-800 mm/s speed range and the 1.0 MPa maximum pressure.
This adjustable-stroke, variable-cushion design excels in shock-sensitive trial fits where both the end position and deceleration need tuning. Remember that the air cushion only decelerates the piston; it does not lock or hold the load. If air pressure drops, the rod drifts, so fit an external rod lock or pilot check valve for suspended loads. Mounting options include LB foot, FA flange, and TC trunnion (no SDB).
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 MFCJ20X80-100S FAQ
This 20 mm bore cylinder features a 1/8" air port and an M8x1.25 male rod thread. It generates 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.
The -S suffix indicates a built-in magnet compatible with CMSG, DMSG, and EMSG switches. The external adjuster only shortens the extend end position; it is not a mid-stroke lock. The air cushions decelerate the piston but cannot hold a load on air loss—install an external rod lock for suspended loads.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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