Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40 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
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40
Tune both extend length and end-of-stroke shock on site with this 40 mm bore adjustable-stroke cylinder. A 40 mm external adjuster window lets you shorten the extend end from a 75 mm nominal down to 35 mm, while the needle variable air cushion at both ends soaks up high-speed impact for smooth deceleration.
Built as a JIS-standard round-body mini with a SUS304 stainless barrel and riveted aluminium covers, the body is deliberately shorter than an ISO 6432 cylinder of the same bore and stroke, saving mounting length. It delivers 628.3 N push force at 0.5 MPa (879.6 N at 0.7 MPa), giving a safe working load of about 377 N or a 2:1 vertical lift capacity of roughly 32 kg. The 1/4" port and M14x1.5 male rod thread handle the airflow for this force class.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40 |
|---|---|
| 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 MFCJ40X75-40
| 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 MFCJ40X75-40 Is Used
High-Speed Press Feed
Dial in the 35-75 mm extend stop and tune the needle air cushion to absorb shock when pushing 32 kg stock billets into a press at 800 mm/s.
Package Divert Arm
Adjust the stroke window on the fly during product changeovers, using the 628.3 N thrust to push heavy cartons smoothly onto a secondary line without end-of-stroke slam.
Workpiece Clamp
Secure large fixtures in trial-fit stations, relying on the 879.6 N push force at 0.7 MPa and fine-tuning the extend length to accommodate varying part widths.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X75-40 the Right Cylinder?
When sizing, compare this MFCJ40 at 628.3 N push @0.5 MPa against the smaller MFCJ32 at 402.2 N. Choose the 40 mm bore when your changeover or trial-fit fixture needs that extra thrust margin at speed. The adjustable stroke and dual variable air cushions are exactly what high-speed, shock-sensitive applications need, letting you dial in the exact extend stop and deceleration ramp on the floor.
Remember that the air cushion only decelerates the piston near the end of stroke; it is not a brake. If the machine loses air, the piston will drift, so fit an external rod lock or pilot check valve to hold a suspended load. Mount via LB foot, FA flange or TC trunnion (no SDB). Because this SKU lacks the -S magnet, it cannot take a CMSG/DMSG/EMSG switch; order the -S variant if you need 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 MFCJ40X75-40 FAQ
This 40 mm bore cylinder has a 1/4" port and an M14x1.5 male rod thread. 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.
The external adjuster shortens the extend stroke by up to 40 mm (usable range 35-75 mm), while the variable air cushion at both ends decelerates the piston at high speed. The cushion is not a lock or brake, so the piston drifts on air loss. Also, this SKU has no -S magnet and cannot take CMSG/DMSG/EMSG sensors.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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