Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-30 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 MFCJ20X50-30
Dial in exact extend lengths on the fly with the AirTAC MFCJ20X50-30, a JIS-standard round-body mini cylinder built for high-speed precision. The external adjuster shortens the extend stroke by up to 30 mm, yielding a usable 20-50 mm window, while needle variable air cushions at both ends soak up end-of-stroke shock. Its SUS304 stainless barrel and riveted aluminium covers form a compact body that is physically shorter than a comparable ISO 6432 unit, saving valuable mounting space.
Operating at 0.15-1.0 MPa with a 1/8" port and an Ø8 mm rod, this double-acting actuator delivers 157 N of push force at 0.5 MPa. That translates to a safe working load of roughly 94 N, or vertically lifting about 8 kg with a 2:1 margin. Note this specific SKU lacks the -S magnet, so it cannot host CMSG, DMSG or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-30 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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 MFCJ20X50-30
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MFCJ20X50-30 Is Used
Light Part Ejection
Tune the extend endpoint within the 30 mm window to reliably push small plastic components out of a machining fixture without damaging the part surface.
High-Speed Diverting
Sort lightweight cartons on a packaging line; the variable air cushion brings the 8 mm rod to a gentle stop at high cycling speeds to prevent mechanical shock.
Lab Automation Trial Fits
Perfect for prototype assemblies where the exact extend position of a 157 N push force needs iterative on-site adjustment before finalising the stroke length.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-30 the Right Cylinder?
Weigh the MFCJ20X50-30 against the larger MFCJ25 when sizing your drive. The 20 mm bore yields 157 N push and 131.9 N pull at 0.5 MPa, whereas the MFCJ25 pushes 245.3 N. Choose the 20 mm bore for lighter, faster changeovers where exact positioning and end-deceleration matter more than raw thrust. The 30 mm adjustable window is perfect for trial fits where the exact extend endpoint varies.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover mount is available). Because this is a non-magnet SKU, position sensing is impossible without switching to an -S variant. Remember that the air cushion only decelerates the piston near stroke end; it does not lock or hold the load. If you need to prevent drift on air loss, install an external rod lock or pilot 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 MFCJ20X50-30 FAQ
This 20 mm bore double-acting cylinder features a 1/8" port and an Ø8 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 lacks the -S magnet, so CMSG, DMSG or EMSG switches cannot be mounted. The external adjuster shortens the extend stroke by up to 30 mm (usable range 20-50 mm), while the variable air cushions at both ends decelerate the piston near the endpoints; the cushion is not a brake.
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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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