Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50 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 MFCJ20X80-50
Dial in exact end positions on-site with the AirTAC MFCJ20X80-50, a JIS-standard round-body mini cylinder featuring a 50 mm adjustable extend window (yielding a 30-80 mm usable stroke). The riveted SUS304 stainless barrel and aluminium covers form a compact body that is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length while resisting mild washdown corrosion.
Driven by filtered air through a 1/8" port, this double-acting actuator generates 157 N of push force at 0.5 MPa. Needle-set variable air cushions at both ends absorb high-speed end-of-stroke shock for smooth deceleration. With a safe working load around 94 N, it lifts about 8 kg vertically with a 2:1 margin. Note this SKU lacks a magnet and cannot accept CMSG/DMSG/EMSG switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50 |
|---|---|
| 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 MFCJ20X80-50
| 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 MFCJ20X80-50 Is Used
Light Parts Ejection
Tunes the extend stroke by up to 50 mm during trial fits on an ejection station, while the variable air cushion prevents bounce when cycling at high speeds.
Diverter Arm Positioning
Provides exact 30-80 mm reach on a conveyor diverter for mixed product sizes, using the 157 N push force to deflect lightweight goods smoothly.
Film Feed Tensioning
Absorbs end-of-stroke shock on a packaging feed mechanism, allowing operators to fine-tune the extend endpoint on-site without changing hardware.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X80-50 the Right Cylinder?
When sizing this 20 mm bore against the MFCJ25, compare the actual thrust: this model pushes 157 N versus 245.3 N for the 25 mm variant at 0.5 MPa. Choose the 20 mm bore for lighter, high-speed changeovers where both the exact extend position and end-of-stroke shock need independent tuning via the external adjuster and needle cushion.
The adjuster only shortens the extend stroke and the cushion solely decelerates the piston; neither acts as a brake, so the rod will drift if air pressure drops. For suspended loads, install an external rod lock or pilot check valve. Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Because this specific SKU has no -S magnet, position sensing is unavailable.
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 MFCJ20X80-50 FAQ
This 20 mm bore cylinder uses a 1/8" air 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 maximum force of 32 kgf at 1.0 MPa.
No, this specific SKU lacks the -S magnet option, so it cannot accept CMSG, DMSG, or EMSG switches. The external adjuster shortens the extend stroke by up to 50 mm on-site, but the variable air cushion only decelerates the piston near the end of travel; it does not lock the load.
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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