Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 80mm 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
- Stroke80 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 MFCJ20X80-50S
Trim the extend stroke by up to 50 mm on-site with the external adjuster, while needle air cushions at both ends absorb high-speed shock. This double-acting JIS-standard round-body mini cylinder features a SUS304 stainless barrel and riveted aluminium covers, offering a shorter mounting length than a comparable ISO 6432 unit.
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. The included -S piston magnet supports CMSG, DMSG or EMSG switches for position sensing.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 80 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 MFCJ20X80-50S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MFCJ20X80-50S Is Used
Light Parts Ejection
Tune the extend stroke on the fly to eject delicate plastic parts without smashing them, relying on the air cushion for gentle high-speed contact.
Package Diverter
Adjust the 50 mm window to match varying box sizes on a conveyor line, using the 94 N safe force to push lightweight cartons smoothly.
Lab Automation Fit
Leverage the SUS304 stainless barrel and compact JIS body for washdown-resistant sample handling, dialing in the exact stop point during trial runs.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50S the Right Cylinder?
Choose the 20 mm bore for lighter tasks requiring roughly 94 N of safe working force, or step up to the MFCJ25 (245.3 N at 0.5 MPa) for heavier loads. The 50 mm adjustable window is perfect for changeovers where the exact extend position and end-of-stroke deceleration both need tuning. Mount via LB foot, FA flange or TC trunnion (no SDB). Remember that the air cushion only decelerates the piston; it does not lock the load. For vertical holding 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 MFCJ20X80-50S 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. The variable air cushion only decelerates the piston near the end of stroke; it is not a brake or lock. The external adjuster sets the extend end position (up to 50 mm shortening), but the cylinder drifts on air loss. The -S magnet enables CMSG/DMSG/EMSG sensors for position feedback.
Authorized Export Seller
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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