Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-50
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-50 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 80mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke80 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-50
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ40X80-50, a JIS-standard round-body mini cylinder. It features a 50 mm external adjuster that shortens the 80 mm extend stroke on site, paired with a variable air cushion at both ends. The SUS304 stainless barrel and riveted aluminium covers resist mild corrosion and washdowns, while the body is noticeably shorter than an ISO 6432 unit of the same bore and stroke, saving valuable mounting length.
Built for robust actuation, this 40 mm bore double-acting cylinder uses a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. For practical sizing, expect a safe working load around 377 N, which means it lifts about 32 kg vertically with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-50 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-50 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 80 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MFCJ40X80-50
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | 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 MFCJ40X80-50 Is Used
High-Speed Clamping
Tune the 50 mm extend window to clamp varying part widths securely while the variable air cushion prevents end-of-stroke impact on rapid 628.3 N strokes.
Transfer Diverting
Adjust the pusher length on the fly for different carton sizes on a packaging line, relying on the 377 N safe working load to deflect goods smoothly.
Pallet Positioning
Fine-tune the stop position for pallets during loading, using the JIS-standard compact body to fit tight conveyor frames without sacrificing lift capacity.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-50 the Right Cylinder?
Choose between the two available bores based on your force requirements: the MFCJ32 provides 402.2 N of push force at 0.5 MPa, whereas this MFCJ40 steps up to 628.3 N. Select the 40 mm bore when moving heavier fixtures or overcoming high friction at high speeds, and use the 50 mm adjustable window to perfect the extend position during trial fits or machine changeovers without machining new spacers.
Remember the needle air cushion only decelerates the piston near the stroke end to reduce shock; it is not a brake. If gravity or air loss could cause the load to drift, install an external rod lock or pilot check valve. For mounting, use LB foot, FA flange or TC trunnion brackets (no SDB or back-cover option exists). Because this specific SKU has no magnet, add the -S variant if you need 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 MFCJ40X80-50 FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod. At 0.5 MPa it delivers 628.3 N push and 527.8 N pull. At 0.7 MPa it delivers 879.6 N push and 738.9 N pull. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors. The external adjuster shortens the extend stroke by up to 50 mm on site, and the variable air cushion at both ends decelerates the piston to reduce shock, but it does not lock the load.
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