Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-40 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 MFCJ40X80-40
Tune both travel and end-of-stroke shock on site with this 40 mm bore double-acting cylinder. A 40 mm external adjuster shortens the extend stroke from its 80 mm nominal maximum, while a needle variable air cushion at both ends soaks up high-speed impact for smooth deceleration. The JIS-standard riveted round-body construction uses a SUS304 stainless barrel that resists mild washdown corrosion, and it packs into a shorter mounting envelope than an ISO 6432 cylinder of the same size.
Delivering 628.3 N of push force at 0.5 MPa (879.6 N at 0.7 MPa) through a 1/4 inch port and M14x1.5 male rod thread, it fits robust mid-force machinery. With a safe working load around 377 N, 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 MFCJ40X80-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-40 |
|---|---|
| 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 MFCJ40X80-40
| 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 MFCJ40X80-40 Is Used
High-Speed Forming Press Feed
Dial in the 40 mm extend window to time the raw material push precisely, relying on the variable air cushion to absorb the 628.3 N high-speed impact without slamming the aluminium cover.
Package Divert Arm
Tune the actuator travel on site to match varying box sizes, letting the needle cushion quietly stop the 80 mm stroke at 800 mm/s without jarring the conveyor frame.
Pallet Stopper Gate
Set the exact stop position for different pallet depths using the external adjuster, while the SUS304 stainless barrel handles the mildly humid dock environment.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-40 the Right Cylinder?
When sizing this series, compare the two available bores directly: this 40 mm version yields 628.3 N push at 0.5 MPa, whereas the smaller MFCJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier jigs or overcoming high friction, and use the 40 mm adjustable window to dial in the exact extend position during changeovers without machining spacers. The variable cushion is essential for speeds up to 800 mm/s where fixed bumpers would bounce.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover). Because this is a non-magnet SKU, position sensing is impossible without switching to an -S variant. Remember the cushion only decelerates the piston near the stroke end; it does not hold the load. If air pressure drops, the rod drifts, so fit an external rod lock or pilot check valve for suspended loads.
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 MFCJ40X80-40 FAQ
This 40 mm bore double-acting cylinder uses a 1/4 inch port and an M14x1.5 male rod thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, increasing to 879.6 N push and 738.9 N pull at 0.7 MPa. 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 switches. The external adjuster shortens the extend stroke by up to 40 mm on site (usable range 40-80 mm) for trial fits, while the variable air cushion at both ends decelerates the load at high speed. It does not lock the position mid-stroke.
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Standard models usually ship in 3-4 days.
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