Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-30S 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 MFCJ40X75-30S
Tune both the extend end-point and the end-of-stroke shock directly on your machine with this 40 mm bore adjustable-stroke cylinder. An external adjuster lets you shorten the forward stroke by up to 30 mm on-site, while the needle variable air cushion at both ends soaks up high-speed impact for smooth, quiet motion. The -S suffix means a built-in piston magnet is included for position sensing.
Built as a JIS-standard round-body mini with a SUS304 stainless barrel and riveted aluminium covers, this unit is shorter than an ISO 6432 cylinder of the same bore and stroke, saving valuable mounting length. It pushes with 628.3 N at 0.5 MPa, yielding a safe working load of roughly 377 N or a vertical lift of about 32 kg with a 2:1 margin. The 1/4" port and M14x1.5 male rod thread handle the 879.6 N available at 0.7 MPa.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-30S |
|---|---|
| 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 MFCJ40X75-30S
| 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 MFCJ40X75-30S Is Used
High-Speed Forming Press
Dial in the 45 to 75 mm extend position on the fly and use the needle air cushion to absorb the 628.3 N high-speed impact during repetitive metal forming operations.
Heavy Package Divert
Shift heavier goods with the 879.6 N force available at 0.7 MPa, adjusting the stroke by up to 30 mm to accommodate varying carton sizes without repositioning the cylinder.
Pallet Lift Stopper
Halt pallets smoothly at the end of the line; the variable cushion decelerates the load gently, while the SUS304 stainless barrel withstands mild washdown environments.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-30S the Right Cylinder?
When sizing between the two available bores, compare the real thrust: this MFCJ40 delivers 628.3 N push at 0.5 MPa, whereas the MFCJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier fixtures, and rely on the 30 mm adjustable window to dial in the exact extend position during high-speed changeovers or trial fits without machining new stops.
The variable air cushion is strictly for decelerating the piston near the stroke end to reduce shock; it is not a lock or brake. If your application must hold a vertical load on air loss, add an external rod lock or pilot check valve. For mounting, select LB foot, FA flange, or TC trunnion brackets (no SDB), and use CMSG, DMSG, or EMSG switches with the included -S magnet.
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 MFCJ40X75-30S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum force of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 30 mm, giving a usable forward range of 45 to 75 mm; retract remains full. The variable air cushion at both ends only decelerates the piston near the ends to reduce shock and is not a brake. The -S magnet enables CMSG, DMSG, or EMSG sensors, but an external rod lock is required to hold a load on air loss.
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1-Year Warranty
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Standard models usually ship in 3-4 days.
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