Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-20S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 225mm 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
- Stroke225 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 MFCJ20X225-20S
Dial in the exact extend end-point on-site with the AirTAC MFCJ20X225-20S, a JIS-standard round-body mini cylinder featuring a 20 mm adjustable stroke window (usable extend 205-225 mm) and needle-set variable air cushions at both ends. The SUS304 stainless steel barrel and riveted aluminium covers yield a body that is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length while resisting mild washdown corrosion. A 1/8" port and Ø8 mm rod drive a 157 N push force at 0.5 MPa.
Because this is an -S variant, the built-in piston magnet supports CMSG, DMSG, or EMSG reed and electronic switches for precise position confirmation. The external adjuster solely shortens the extend stroke and the cushions only decelerate the piston near the ends—neither acts as a lock. For a safe working load, expect around 94 N (roughly 60% of the 0.5 MPa push force), which translates to lifting about 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 225 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 MFCJ20X225-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×225 | 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 MFCJ20X225-20S Is Used
Light-Part Trial Fits
Tune the 205-225 mm extend during automated assembly changeovers to perfectly seat delicate 8 kg components without crashing, leveraging the 157 N push force.
High-Speed Diverting
Absorb the impact of rapid 30-800 mm/s diverting strokes using the adjustable needle air cushion, preventing end-cap damage on fast-paced packaging lines.
Lab Positioning Rigs
Rely on the SUS304 stainless barrel and CMSG sensors to confirm exact end positions in mildly corrosive washdown environments while fine-tuning the stroke window on-site.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-20S the Right Cylinder?
When sizing this adjustable-stroke family, compare the real thrust outputs: this 20 mm bore delivers a 157 N push at 0.5 MPa, whereas stepping up to an MFCJ25 provides 245.3 N. Choose the 20 mm bore for lighter, high-speed changeovers where shock-sensitive trial fits demand both a tunable 205-225 mm extend and a variable air cushion to absorb end-of-stroke kinetic energy. The cylinder operates at 30-800 mm/s within a 0.15-1.0 MPa pressure range.
Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover option on this build). Remember that a standard double-acting cylinder drifts when air pressure is lost or the valve is centered; the cushion strictly decelerates motion without locking the load. If your fixture requires true position holding on air loss, install an external rod lock or a pilot-operated 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 MFCJ20X225-20S FAQ
This 20 mm bore cylinder features a 1/8" port and an Ø8 mm rod. It generates a push force of 157 N and a pull force of 131.9 N at 0.5 MPa. At 0.7 MPa, the push is 219.8 N and the pull is 184.7 N. 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 205-225 mm), while the variable air cushion at both ends uses a needle valve to decelerate the piston for smooth high-speed stops. The -S magnet enables CMSG/DMSG/EMSG sensors. Neither the cushion nor the adjuster acts as a brake, so the cylinder will drift on air loss; use an external rod lock for position holding.
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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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