Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-100S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-100S 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 MFCJ40X300-100S
Dial in exact end positions and absorb high-speed impact with the AirTAC MFCJ40X300-100S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. The external adjuster shortens the 300 mm extend stroke by up to a 100 mm window on-site, while needle variable air cushions at both ends soak up end-of-stroke shock. A 1/4" port and M14x1.5 male rod thread equip the 40 mm bore for heavy-duty cycles.
Delivering 628.3 N push and 527.8 N pull at 0.5 MPa, this double-acting actuator handles robust loads. The compact riveted body is shorter than a comparable ISO 6432 unit, saving valuable machine space. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG or EMSG position switches. Note that the cushion only decelerates the piston; it does not hold the load on air loss.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-100S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-100S |
|---|---|
| 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 MFCJ40X300-100S
| 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 MFCJ40X300-100S Is Used
Press Fit Tuning
Fine-tune the 100 mm extend window on light assembly presses to perfect part seating, using the variable air cushion to prevent harsh impact at high speed.
Variable Stroke Diverters
Adjust the actuator endpoint on the fly for mixed-product conveyor lines, relying on the 628.3 N push force to push heavy cartons smoothly.
Pallet Changeovers
Dial in exact stops for different pallet sizes during format changes, letting the needle cushion absorb the kinetic energy of fast 40 mm bore motion.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X300-100S the Right Cylinder?
When sizing a variable-cushion adjustable cylinder, compare the two available bores. The 40 mm bore here yields 628.3 N push at 0.5 MPa, stepping up from the MFCJ32 which provides 402.2 N. For this 40 mm class, a practical safe working load is roughly 377 N, lifting about 32 kg vertically with a 2:1 safety margin. Choose the 40 mm bore when moving heavier jigs or overcoming high friction.
This 100 mm adjuster window excels in changeovers where the exact extend endpoint and end-of-stroke shock both need field tuning. Mount via LB foot, FA flange or TC trunnion (no SDB or back-cover option). If the application must hold position during air loss, add an external rod lock or pilot check valve, as the air cushion only decelerates and never locks the load.
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 MFCJ40X300-100S FAQ
This 40 mm bore double-acting cylinder uses a 1/4" port. 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 of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 100 mm, and the variable air cushion at both ends decelerates the piston near the end of travel. The cushion is not a brake; for load holding on air loss, install an external rod lock or pilot check valve. The -S suffix means it has a magnet for CMSG, DMSG or 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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