Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-30 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 300mm 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
- Stroke300 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 MFCJ20X300-30
Dial in the extend end by up to 30 mm on site with this double-acting, adjustable-stroke mini cylinder. The external adjuster lets you trim the usable extend from 270 to 300 mm, while a needle variable air cushion at both ends soaks up high-speed shock for smooth stops. This JIS-standard round-body unit features a SUS304 stainless barrel and riveted aluminium covers, giving you a shorter mounting length than a comparable ISO 6432 build while resisting mild washdown.
In the 20 mm bore class it delivers 157 N of push force at 0.5 MPa through a 1/8" port, yielding a safe working load of about 94 N. That translates to lifting roughly 8 kg vertically with a 2:1 safety margin. Because this SKU lacks the -S magnet, it cannot accept CMSG, DMSG or EMSG position switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-30 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 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 MFCJ20X300-30
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×300 | 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 MFCJ20X300-30 Is Used
Lightweight Trial Fits
Use the 30 mm adjuster to fine-tune the extend position during short-run changeovers, letting the air cushion absorb the impact of high-speed 94 N test pushes.
Small Parts Diverting
Trim the stroke on site to dial in the exact push distance for delicate product routing, relying on the variable cushion to prevent harsh end-of-stroke slams.
Lab Automation Stops
Set precise 270 to 300 mm extend limits for lab equipment where the 8 kg vertical lift capacity handles sample trays quietly without jarring stops.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-30 the Right Cylinder?
When sizing this 20 mm bore against an MFCJ25, note the 25 mm version pushes 245.3 N at 0.5 MPa versus 157 N here; choose the 20 mm for lighter, high-speed changeovers where exact stroke and end-of-stroke shock both need tuning. The variable air cushion decelerates the piston near the ends but does not lock the load—if you need to hold position on air loss, add an external rod lock or pilot check valve.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover code exists on this adjustable build). If your application requires sensors, select the -S magnet variant to enable CMSG, DMSG or EMSG switches.
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 MFCJ20X300-30 FAQ
This 20 mm bore cylinder uses a 1/8" 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.
No, this specific SKU does not include a magnet, so it cannot accept CMSG, DMSG or EMSG switches. You would need the -S variant for sensing. The 30 mm external adjuster only shortens the extend stroke, and the variable air cushion decelerates the piston but does not act as a brake.
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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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