Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-40 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 50mm 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
- Stroke50 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM14×1.5
- 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 MFCJ40X50-40
Trim the extend stroke by up to 40 mm on site with this double-acting, variable-cushion mini cylinder. The MFCJ40X50-40 uses a JIS-standard riveted round body with a SUS304 stainless barrel, yielding a shorter mounting envelope than an ISO 6432 unit of the same bore.
Featuring a 16 mm rod, M14x1.5 male thread, and a 1/4" port, the 40 mm bore pushes 628.3 N at 0.5 MPa. Needle air cushions at both ends absorb high-speed shock. This SKU lacks a magnet, so it cannot take a sensor; the -S variant enables CMSG/DMSG/EMSG switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-40 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 50 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 MFCJ40X50-40
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×50 | 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 MFCJ40X50-40 Is Used
High-Speed Forming Press
Dial in the 40 mm extend window and tune the needle cushions to absorb the 628.3 N push force impact during rapid metal stamping changeovers.
Package Divert Arm
Adjust the stroke on the fly for varying carton sizes while the variable air cushions quietly decelerate the 40 mm bore at 800 mm/s.
Pallet Stopper Gate
Set the exact 10 to 50 mm extend position to halt pallets. The SUS304 barrel resists washdown moisture in damp dispatch zones.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X50-40 the Right Cylinder?
When sizing, the 40 mm bore delivers 628.3 N push at 0.5 MPa, stepping up from the MFCJ32 at 402.2 N. With a 2:1 safety margin, this bore lifts about 32 kg vertically, giving a safe working load near 377 N. Choose this adjustable-cushion model for high-speed changeovers where both the end position and shock deceleration need tuning.
The external adjuster only shortens the extend stroke; it does not lock the piston mid-cycle. If air drops, the load drifts, so add an external rod lock or pilot check valve for holding. Mount via LB foot, FA flange, or TC trunnion (no SDB). Since this specific unit 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 MFCJ40X50-40 FAQ
This 40 mm bore cylinder features a 1/4" port and delivers a push of 628.3 N and pull of 527.8 N at 0.5 MPa. At 0.7 MPa, push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU lacks the -S magnet, so CMSG/DMSG/EMSG switches cannot be fitted. The external adjuster shortens the extend stroke by up to 40 mm on site, while the variable air cushions at both ends handle deceleration. The cushion is not a brake.
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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.
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Most inquiries answered within 7-8 hours.
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