Airtac MFCJ Adjustable Mini Cylinder MFCJ40X35-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X35-20S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø40mm bore and 35mm 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
- Stroke35 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 MFCJ40X35-20S
Dial in exact end positions and tame high-speed shock with the AirTAC MFCJ40X35-20S. This double-acting JIS-standard round-body mini cylinder features a 20 mm external adjuster that shortens the nominal 35 mm extend stroke down to 15 mm on-site, while needle-set variable air cushions at both ends soak up end-of-stroke impact. Built with a SUS304 stainless barrel and riveted aluminium covers, it resists mild corrosion and washdowns while saving mounting length compared to an ISO 6432 unit of the same bore.
In the 40 mm bore class, this cylinder delivers a 628.3 N push force and 527.8 N pull force at 0.5 MPa, peaking at a theoretical 128.1 kgf at 1.0 MPa. The integrated -S piston magnet enables CMSG, DMSG, or EMSG switches for position sensing. For sizing, its safe working load is roughly 377 N, meaning it can vertically lift about 32 kg with a 2:1 safety margin. The 1/4" port and M14x1.5 male rod thread ensure robust pneumatic and mechanical connections for rapid changeovers.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X35-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X35-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 35 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 MFCJ40X35-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 40 | Bore size in mm. |
| ×35 | 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 MFCJ40X35-20S Is Used
High-Speed Component Pressing
Leverage the 628.3 N push force to seat bearings, then dial in the exact 15 to 35 mm extend depth via the adjuster while the dual air cushions absorb the 800 mm/s impact.
Dynamic Package Diverting
Trim the stroke on-site during product changeovers and rely on the needle cushions to silently stop the diverter arm, lifting boxes up to 32 kg safely.
Pallet Stopper Tuning
Use the 527.8 N pull force to retract the stopper blade, fine-tuning the extend position to match pallet thickness while the SUS304 barrel handles dusty washdown environments.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X35-20S the Right Cylinder?
Choose the MFCJ40 over the MFCJ32 when you need extra muscle: the 40 mm bore pushes 628.3 N at 0.5 MPa compared to 402.2 N for the 32 mm variant. This 40 mm model is ideal for high-speed changeovers or shock-sensitive trial fits where both the exact extend endpoint (trimmed within the 20 mm window) and the deceleration rate need field tuning. Mounting options include LB foot, FA flange, and TC trunnion (note: no SDB or back-cover mount is available on this adjustable build).
Remember that the variable air cushion only decelerates the piston near the stroke end; it is not a brake. If the machine loses air, the piston will drift, so fit an external rod lock or pilot-operated check valve for suspended loads. Because this SKU includes the -S magnet, you can directly mount CMSG, DMSG, or EMSG sensors without modifying the cylinder.
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 MFCJ40X35-20S 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, 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 20 mm (usable range 15-35 mm), while the needle-set variable air cushions at both ends decelerate the piston to absorb high-speed shock. Because it has the -S magnet, you can add CMSG, DMSG, or EMSG sensors for position confirmation.
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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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