Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50 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 MFCJ20X50-50
Trim the extend end by up to 50 mm on site with the external adjuster, while needle variable air cushions at both ends soak up high-speed shock. This AirTAC MFCJ20X50-50 is a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers, delivering 157 N of push force at 0.5 MPa.
Because the riveted round body is shorter than an ISO 6432 unit for the same 20 mm bore and 50 mm stroke, it saves valuable mounting length while resisting mild washdown. The 1/8" port and Ø8 mm rod keep the footprint compact, yielding a safe working load around 94 N or lifting about 8 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50 |
|---|---|
| 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 MFCJ20X50-50
| 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 MFCJ20X50-50 Is Used
Trial Fit Positioning
Dial in the exact 0-50 mm extend end point during prototype assembly or tooling changeovers, using the needle cushion to soften high-speed stops for delicate 8 kg fixtures.
Light Transfer Diverter
Redirect small packages on a conveyor by tuning the extend stroke on the fly, relying on the 157 N push force and variable air cushion to prevent end-of-stroke banging.
Lab Dispense Head
Adjust the downstroke of a dispense or press head within the 50 mm window, letting the washdown-resistant SUS304 barrel and adjustable cushion handle repetitive high-speed cycles.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50 the Right Cylinder?
When sizing these adjustable-stroke units, compare the real 0.5 MPa figures: this 20 mm bore pushes 157 N, whereas stepping up to the MFCJ25 provides 245.3 N. Choose the 20 mm bore for lighter, shock-sensitive trial fits where you need to tune both the extend end position and the end-of-stroke deceleration during high-speed changeovers.
The variable air cushion only decelerates the piston near the end of travel; it is not a lock or brake, and the piston will drift if air pressure drops. For suspended loads that must hold position, add an external rod lock or pilot-operated check valve. Mounting options include LB foot, FA flange, and TC trunnion (no SDB), and you must select an -S variant if you require position sensing.
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 MFCJ20X50-50 FAQ
This 20 mm bore double-acting cylinder uses a 1/8" port and an Ø8 mm rod with an M8x1.25 male 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 max of 32 kgf at 1.0 MPa. It features a variable air cushion at both ends and operates at 30-800 mm/s.
No, this specific SKU does not include the -S magnet, so it cannot accept CMSG, DMSG, or EMSG magnetic switches. You must select the -S variant of the MFCJ to enable sensing capabilities for confirming the adjusted extend position.
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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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Most inquiries answered within 7-8 hours.
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