Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-50
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-50 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 MFCJ40X75-50
Tune both the extend length and the end-of-travel shock directly on the machine with this JIS-standard round-body mini cylinder. It features a 50 mm adjustable window, allowing you to shorten the extend stroke on-site from a 75 mm nominal length down to 25 mm, while the needle-set variable air cushion at both ends soaks up high-speed impact. As a double-acting actuator, it delivers a robust 628.3 N push force at 0.5 MPa.
The SUS304 stainless steel barrel and riveted aluminium covers resist mild corrosion and washdown environments, while the body is purposefully shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting space. This specific SKU lacks a magnet, so it cannot accept position switches; choose the -S variant if you need CMSG, DMSG, or EMSG sensors. Based on the 0.5 MPa push figure, it handles a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-50 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-50 |
|---|---|
| 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 MFCJ40X75-50
| 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 MFCJ40X75-50 Is Used
High-Speed Changeover
Dial in the exact extend position within the 50 mm window and set the needle cushion to handle 628.3 N of thrust smoothly during rapid product format changes.
Trial Fit Assembly
Ideal for robotic deburring stations where the 40 mm bore pushes a tool against a part, allowing on-site stroke shortening to prevent over-travel and marking.
Vertical Lift Gates
Lifts about 32 kg vertically using the 0.5 MPa push force, with the variable air cushion ensuring the gate decelerates softly at the upper end stop without slamming.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-50 the Right Cylinder?
When sizing between the two available bores, weigh the MFCJ40 against the MFCJ32. This 40 mm bore provides 628.3 N of push force at 0.5 MPa, whereas the 32 mm bore offers 402.2 N. Choose the 40 mm option when moving heavier fixtures or overcoming high friction at high speeds. The adjustable stroke and cushion combination is perfect for trial fits and high-speed changeovers where the exact end position and deceleration both require fine-tuning.
Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover option). Note that the air cushion only decelerates the piston near the stroke end; it does not function as a lock or brake. If your application must hold a load vertically during air loss, add an external rod lock or pilot-operated check valve. The 1/4" port and M14x1.5 male rod thread ensure solid pneumatic and mechanical connections.
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 MFCJ40X75-50 FAQ
This double-acting cylinder uses a 1/4" air port and an M14x1.5 male rod thread. It generates a push force of 628.3 N and a pull force of 527.8 N at 0.5 MPa. At 0.7 MPa, the push increases to 879.6 N and the pull to 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
This specific SKU does not have a magnet and cannot accept CMSG, DMSG, or EMSG switches; you need the -S variant for sensing. 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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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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