Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 75mm 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
- Stroke75 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 MFCJ40X75-40S
Tune both the extend endpoint and end-of-stroke shock on-site with this AirTAC MFCJ40X75-40S double-acting mini cylinder. An external adjuster shortens the extend stroke by up to 40 mm (usable range 35-75 mm), while a needle-set variable air cushion at both ends soaks up high-speed kinetic energy for smooth, quiet operation. The 1/4" port and Ø16 mm rod deliver robust force, pushing 879.6 N at 0.7 MPa.
Built to JIS standards with a SUS304 stainless steel barrel and riveted aluminium covers, this round-body design is notably shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length while resisting mild washdown corrosion. The -S suffix denotes a built-in piston magnet for CMSG, DMSG, or EMSG switches. For sizing, a safe working load is roughly 377 N (about 60% of the 628.3 N push force at 0.5 MPa), lifting approximately 32 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 75 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 MFCJ40X75-40S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×75 | 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 MFCJ40X75-40S Is Used
High-Speed Component Pressing
Dial in the exact 35-75 mm extend endpoint and tune the needle air cushion to absorb the 879.6 N push force impact during rapid automated assembly press fits.
Variable-Length Diverting
Adjust the stroke on the fly to handle different package sizes on a conveyor line, relying on the 628.3 N thrust at 0.5 MPa to push heavy cartons smoothly.
Shock-Sensitive Sealing
Prevent product crushing during high-speed packaging cycles by fine-tuning the extend window and engaging the variable air cushion for a soft, controlled stop.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40S the Right Cylinder?
Choose the MFCJ40 over the MFCJ32 when your application demands higher mid-range thrust; the 40 mm bore pushes 628.3 N at 0.5 MPa compared to 402.2 N on the 32 mm bore. This adjustable-stroke, variable-cushion design is purpose-built for high-speed changeovers and shock-sensitive trial fits where you must dial in both the exact extend endpoint and the deceleration rate on the fly.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover). Because the -S magnet is present, you can directly fit CMSG, DMSG, or EMSG sensors for position feedback. Note that the air cushion only decelerates the piston near stroke end—it is not a lock. If the machine loses air, the piston will drift; to hold a load securely, install an external rod lock or pilot-operated check valve.
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 MFCJ40X75-40S FAQ
This 40 mm bore cylinder features a 1/4" air port and a Ø16 mm piston rod. At 0.5 MPa it pushes 628.3 N and pulls 527.8 N. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm on-site, giving a usable extend range of 35-75 mm, while the retract stroke remains full. The -S suffix means it has a built-in piston magnet for CMSG, DMSG, or EMSG switches. The variable air cushion only decelerates the piston near the end of stroke and does not lock or hold the load.
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