Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-75S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-75S 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 MFCJ40X75-75S
Dial in your extend stroke by up to 75 mm on site with this adjustable-stroke mini cylinder, all while a needle-set variable air cushion at both ends soaks up high-speed shock. The MFCJ40X75-75S is a JIS-standard round-body actuator built with a SUS304 stainless barrel and riveted aluminium covers, making it shorter than an ISO 6432 cylinder of the same bore and stroke to save mounting length.
Featuring a 1/4" port and a 16 mm rod, this 40 mm bore double-acting design delivers 628.3 N of push force at 0.5 MPa. The built-in magnet (-S) enables CMSG, DMSG, or EMSG switches for position sensing. For sizing, it yields a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-75S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-75S |
|---|---|
| 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 MFCJ40X75-75S
| 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 MFCJ40X75-75S Is Used
High-Speed Forming Press
Handles the 628.3 N push force required to seat components, using the 75 mm adjuster to fine-tune the extend hit and the air cushion to absorb rapid deceleration.
Product Divertor Gate
Tunes the stroke window on-site for varying box sizes while the needle cushion prevents end-of-stroke slam during fast 30-800 mm/s cycling.
Pallet Stopper Arm
Lifts about 32 kg vertically with a 2:1 safety margin, relying on the SUS304 stainless barrel to resist washdown in damp dispatch zones.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-75S the Right Cylinder?
When choosing between the two available bores, the MFCJ40 provides 628.3 N of push force at 0.5 MPa compared to the 402.2 N of the MFCJ32, making this 40 mm option better for heavier moving masses. The adjustable stroke and dual air cushions shine during high-speed changeovers or shock-sensitive trial fits where you must tune both the extend end position and the deceleration ramp on the fly.
Remember that the air cushion only decelerates the piston near the stroke end; it is not a brake. If air loss occurs, the piston will drift, so fit an external rod lock or pilot check valve to hold a suspended load. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back cover), and the -S magnet allows seamless sensor integration.
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 MFCJ40X75-75S FAQ
This 40 mm bore double-acting cylinder features a 1/4" port and a 16 mm rod. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 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.
An external adjuster shortens the extend stroke by up to 75 mm, while the variable air cushion at both ends decelerates the piston near the end of travel. The cushion is not a lock or brake; the piston drifts on air loss. The -S magnet allows CMSG, DMSG, or EMSG sensors for position feedback.
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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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