Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 250mm stroke, 1/8" 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.
- BoreØ20 mm
- Stroke250 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- 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 MFCJ20X250-20
Dial in exact end positions on-site with the AirTAC MFCJ20X250-20, a JIS-standard round-body mini cylinder featuring a 20 mm adjustable extend window and variable air cushions at both ends. The external adjuster shortens the 250 mm extend stroke down to 230 mm, while the needle cushions soak up high-speed end-of-travel shock. An Ø8 mm rod and 1/8" port deliver 157 N of push force at 0.5 MPa.
Built with a SUS304 stainless steel barrel and riveted aluminium covers, this double-acting unit resists mild corrosion and washdown. Its riveted round-body construction is physically shorter than a comparable ISO 6432 cylinder, saving valuable mounting length. This non-magnet SKU cannot host a sensor; add the -S option for CMSG/DMSG/EMSG switches. With a safe working load around 94 N, it lifts about 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | 185 N |
| Max (@1.0 MPa) | 32 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 MFCJ20X250-20
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×250 | 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 MFCJ20X250-20 Is Used
Lightweight Parts Ejection
Tunes the extend stroke by up to 20 mm to strike small plastic parts cleanly at high speed, using the variable air cushion to prevent harsh impact on the 8 kg load limit.
Package Diverter Arm
Adjusts the push stroke on the fly during product changeovers, relying on the 157 N thrust to side-track light cartons smoothly without bouncing.
Lab Test Fixture
Provides a compact, washdown-resistant SUS304 body for trial fits, allowing operators to fine-tune the extend position and deceleration rate for delicate sensors.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20 the Right Cylinder?
Choose the 20 mm bore for lighter tasks requiring 157 N push at 0.5 MPa, or step up to the MFCJ25 for 245.3 N if the load demands more thrust. The 20 mm adjust window is ideal for high-speed changeovers where the exact extend position and end shock both need field tuning. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover). Note that the cushion only decelerates the piston and is not a lock; the cylinder drifts on air loss, so specify an external rod lock or pilot check valve for held loads. Since this specific SKU lacks the -S magnet, it cannot accept position sensors.
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 MFCJ20X250-20 FAQ
This 20 mm bore cylinder has a 1/8" port and an Ø8 mm rod. It generates 157 N push and 131.9 N pull at 0.5 MPa, 219.8 N push and 184.7 N pull at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet, so it cannot accept CMSG, DMSG, or EMSG switches. You must select the -S variant for sensing. The 20 mm external adjuster shortens the extend stroke, and the needle air cushion decelerates the piston but does not lock the load.
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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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