Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-30
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-30 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 MFCJ40X300-30
Dial in your extend stroke on-site with the AirTAC MFCJ40X300-30, a JIS-standard round-body mini cylinder built from a SUS304 stainless barrel and riveted aluminium covers. An external adjuster shortens the extend end by up to 30 mm (usable range 270-300 mm), while a needle variable air cushion at both ends soaks up high-speed shock for smooth, quiet motion.
Delivering 628.3 N push and 527.8 N pull at 0.5 MPa, this 40 mm bore unit handles heavier loads with a safe working capacity around 377 N. It runs on a 1/4" port with a 16 mm rod (M14x1.5 thread). Note this SKU lacks the -S magnet, so it cannot accept CMSG/DMSG/EMSG switches. The compact MF body is shorter than an ISO 6432 cylinder for the same stroke, saving valuable mounting length.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-30 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-30 |
|---|---|
| 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 MFCJ40X300-30
| 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 MFCJ40X300-30 Is Used
High-Speed Diverters
Tune the 30 mm extend window and dial in the needle air cushion to softly stop heavy 40 mm bore diverting arms moving at high speed without end-cap shock.
Press Trial Fits
Leverage the 628.3 N push force and adjustable end position for light pressing or clamping setups where the exact 270-300 mm reach must be set during commissioning.
Pallet Stop Arms
Absorb the kinetic energy of incoming goods using the variable air cushion, while trimming the stroke on-site to match varying pallet dimensions on the line.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-30 the Right Cylinder?
Choose between the two available bores based on your force needs: the MFCJ32 provides 402.2 N push at 0.5 MPa, whereas this MFCJ40 delivers 628.3 N. Select the 40 mm bore when moving heavier platens at speed, as the adjustable 30 mm window and variable air cushion let you tune both the end position and the deceleration ramp during high-speed changeovers or shock-sensitive trial fits.
Mount via LB foot, FA flange, or TC trunnion (no SDB or back-cover option exists on this build). Because this specific SKU has no -S magnet, position sensing is unavailable. Remember that the air cushion only decelerates the piston near stroke end—it is not a lock. If your application must hold a vertical load on air loss, install an external rod lock or pilot-operated check valve.
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 MFCJ40X300-30 FAQ
This 40 mm bore double-acting cylinder uses a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It delivers 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 300 mm base stroke has a 30 mm adjustable window (usable extend 270-300 mm).
No, this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. The external adjuster only shortens the extend end position within the 30 mm window; it does not lock the piston mid-stroke. The variable air cushion solely decelerates the piston near the end of travel. For load holding on air loss, use an external rod lock or pilot check valve.
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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.
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Most inquiries answered within 7-8 hours.
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