Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-10
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-10 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 300mm 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
- Stroke300 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 MFCJ40X300-10
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ40X300-10, a JIS-standard round-body mini cylinder. It features a SUS304 stainless steel barrel and riveted aluminium covers, offering a shorter mounting length than a comparable ISO 6432 unit. The external adjuster shortens the 300 mm extend stroke by up to 10 mm on-site, while the needle-set variable air cushion at both ends ensures smooth deceleration.
Operating at 0.15-1.0 MPa with a 1/4" port and M14x1.5 male rod thread, this double-acting 40 mm bore generates 628.3 N of push force at 0.5 MPa. This yields a safe working load of roughly 377 N, or about 32 kg of vertical lift with a 2:1 margin. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-10 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-10 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MFCJ40X300-10
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MFCJ40X300-10 Is Used
High-Speed Diverters
Tune the 300 mm extend stroke within its 10 mm window to strike packages precisely, using the variable air cushion to absorb shock during rapid 628.3 N routing cycles.
Machining Clamps
Adjust the end position on-site for varying part tolerances and let the needle cushion soften the impact of heavy 40 mm bore clamping arms at high speed.
Vertical Lift Stops
Lift loads up to 32 kg safely, tweaking the extend end by up to 10 mm to align with conveyor heights while the air cushion minimizes end-of-stroke bounce.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-10 the Right Cylinder?
When sizing this series, compare the two available bores directly: the MFCJ40 delivers 628.3 N push at 0.5 MPa, whereas the smaller MFCJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier fixtures, relying on its 10 mm adjustable extend window and twin air cushions to manage high-speed changeovers and shock-sensitive trial fits.
Keep in mind the air cushion only decelerates the piston near stroke end—it is not 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. For mounting, select LB foot, FA flange, or TC trunnion brackets (SDB and back-cover mounts are unavailable). To add sensing, switch to the -S magnet variant.
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 MFCJ40X300-10 FAQ
This 40 mm bore cylinder uses a 1/4" port and generates 628.3 N push / 527.8 N pull at 0.5 MPa, and 879.6 N push / 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
No, this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. The external adjuster shortens the extend stroke by up to 10 mm on-site, and the variable air cushion decelerates the piston at both ends without acting as a lock.
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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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