Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-40 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 MFCJ20X225-40
Trim the extend stroke by up to 40 mm on site with this adjustable-stroke, variable-cushion mini cylinder. The JIS-standard round-body build uses a SUS304 stainless barrel and riveted aluminium covers, yielding a shorter mounting envelope than an ISO 6432 unit for the same 20 mm bore and 225 mm stroke.
Driven by filtered air at 1/8" ports, the 8 mm rod delivers 157 N of push force at 0.5 MPa, making the safe working load roughly 94 N or about 8 kg of vertical lift with a 2:1 margin. Needle air cushions at both ends absorb high-speed end-of-stroke shock. Note that this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG position switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-40 |
|---|---|
| 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 MFCJ20X225-40
| 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 MFCJ20X225-40 Is Used
Adjustable Tooling Stops
Dial in the extend position within the 40 mm window during machine changeovers, letting the 157 N push force seat delicate components without hard mechanical crashes.
High-Speed Diverter Arms
Use the needle air cushions to soften the impact of rapid 225 mm routing strokes on packaging lines, protecting the 8 mm rod from sudden shock loads.
Lab Test Actuators
Perfect for trial-fit rigs where the exact extend length must be tweaked by hand, leveraging the compact JIS body to fit tight test fixtures.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X225-40 the Right Cylinder?
When sizing a 20 mm bore, this MFCJ20X225-40 provides 157 N push and 131.9 N pull at 0.5 MPa. If your payload demands more, stepping up to an MFCJ25 raises the 0.5 MPa push force to 245.3 N. The 40 mm adjustable window is ideal for changeovers where the exact extend position and end-deceleration both need tuning.
Mount via LB foot, FA flange or TC trunnion (no SDB or back-cover option exists on this adjustable build). Remember that the air cushion only decelerates the piston near the stroke end—it is not a brake. Because air loss will cause the load to drift, install an external rod lock or pilot check valve for suspended loads.
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 MFCJ20X225-40 FAQ
This 20 mm bore cylinder has a 1/8" air port and an 8 mm rod. 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.
No, this specific SKU does not include the -S magnet, so it cannot host CMSG, DMSG or EMSG switches. You would need the -S variant for position sensing. The external adjuster shortens the extend stroke by up to 40 mm but does not lock the position mid-stroke.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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