Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-75
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-75 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 MFCJ40X80-75
Dial in the exact extend position on-site with the AirTAC MFCJ40X80-75, a JIS-standard round-body mini cylinder built from a SUS304 stainless barrel and riveted aluminium covers. An external adjuster shortens the extend stroke by up to 75 mm, while a needle variable air cushion at both ends soaks up high-speed end-of-stroke shock for smooth, quiet motion. This 40 mm bore delivers 628.3 N push force at 0.5 MPa and uses a 1/4" port with an M14x1.5 male rod thread.
The riveted construction is shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting length while resisting mild corrosion and washdown. This SKU ships without a magnet, so it cannot take a CMSG, DMSG or EMSG sensor. For sizing, a safe working load is about 377 N (60% of the 0.5 MPa push force), which lifts roughly 32 kg vertically with a 2:1 safety margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-75 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-75 |
|---|---|
| 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 MFCJ40X80-75
| 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 MFCJ40X80-75 Is Used
Press Fit Tuning
Micro-adjust the 75 mm extend window during light-duty press fits, using the variable air cushion to prevent impact shock on delicate 628.3 N assemblies.
Dynamic Diverting
Fine-tune the diverting stroke length on the fly for mixed product sizes, relying on the 40 mm bore to push heavier loads smoothly at speed.
Carton Forming
Dial in the exact folding flap position during high-speed packaging changeovers, letting the needle cushion absorb end-of-stroke kinetic energy.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X80-75 the Right Cylinder?
Choose the MFCJ40 over the smaller MFCJ32 when you need extra thrust: the 40 mm bore pushes 628.3 N at 0.5 MPa compared to 402.2 N for the 32 mm. This makes the 40 mm ideal for heavier high-speed changeovers or shock-sensitive trial fits where both the end position and deceleration need tuning. Remember the air cushion only decelerates near the stroke end and does not lock the load; the piston drifts on air loss, so fit an external rod lock or pilot check valve for held loads.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover). Because this specific code lacks the -S suffix, it cannot accept magnetic switches; add the -S variant if your fixture requires CMSG, DMSG or EMSG 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 MFCJ40X80-75 FAQ
This 40 mm bore double-acting cylinder pushes 628.3 N and pulls 527.8 N at 0.5 MPa. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N, with a theoretical max of 128.1 kgf at 1.0 MPa. It operates at 30-800 mm/s, uses a 1/4" port, and the base 80 mm stroke is non-standard only if it exceeds 500 mm.
No. This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG switches. The variable air cushion only decelerates the piston near the end of stroke; it is not a brake or lock. The piston drifts on air loss, so use an external rod lock or pilot check valve to hold a load.
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