Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-100
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-100 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 MFCJ20X250-100
Dial in exact extend distances on-site with this double-acting, adjustable-stroke mini cylinder. The external adjuster shortens the extend stroke by up to 100 mm, giving a usable 150-250 mm window, while the needle variable air cushion at both ends soaks up high-speed shock.
Built as a JIS-standard round-body unit with a SUS304 stainless barrel and riveted aluminium covers, it runs at 30-800 mm/s and pushes 157 N at 0.5 MPa through a 1/8" port. It is shorter than an ISO 6432 cylinder for the same bore and stroke, yielding a safe working load of about 94 N and lifting roughly 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-100 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-100 |
|---|---|
| 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 MFCJ20X250-100
| 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 MFCJ20X250-100 Is Used
Adjustable Pusher
Tune the extend position by up to 100 mm on a packaging line pusher to test different carton sizes without swapping hardware.
High-Speed Diverter
Use the needle air cushion to silently stop the 250 mm extend stroke when diverting light 8 kg products at high cycle rates.
Trial Fit Probe
Perfect for lab automation where the exact 150-250 mm extend reach and end-of-stroke shock both need iterative tuning.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-100 the Right Cylinder?
Compare the bores directly: this 20 mm bore yields 157 N push at 0.5 MPa, while the larger MFCJ25 provides 245.3 N. Choose the 20 mm when space is tight and the load is light, stepping up to 25 mm if you need extra thrust. Both offer the same on-site stroke tuning and cushion adjustment for high-speed changeovers.
The air cushion only decelerates the piston near the end of stroke; it does not lock or hold the load. If air pressure drops, the piston drifts, so fit an external rod lock or pilot check valve for suspended loads. Mount via LB foot, FA flange, or TC trunnion. Note this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG 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 MFCJ20X250-100 FAQ
This 20 mm bore cylinder features a 1/8" port and an M8x1.25 male rod thread. 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 force of 32 kgf at 1.0 MPa.
No, this specific SKU does not include the -S magnet option, so it cannot accept CMSG, DMSG, or EMSG switches. You must select an -S variant if magnetic sensing is required for your adjustable stroke application.
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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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