Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20S 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 MFCJ20X250-20S
With a 20mm adjustable window on the extend stroke, this MFCJ20X250-20S lets you fine-tune the end position on-site from 230 to 250mm. The variable air cushion at both ends is needle-set to absorb high-speed shock, making it ideal for changeovers where both stroke length and impact need tuning.
This JIS-standard round-body mini cylinder is shorter than an ISO 6432 unit for the same bore and stroke, saving mounting length. The SUS304 stainless barrel resists mild corrosion and washdown. With the -S magnet, it accepts CMSG, DMSG, or EMSG sensors. At 0.5 MPa, it delivers 157N push and 131.9N pull, giving a safe working load of about 94N.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20S |
|---|---|
| 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 MFCJ20X250-20S
| 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 MFCJ20X250-20S Is Used
Trial Fit Adjustments
Quickly dial in the exact extend position from 230-250mm during machine setup, without swapping cylinders.
High-Speed Sorting
The variable cushion decelerates 157N pushes smoothly, preventing shock and noise in fast sorting mechanisms.
Compact Assembly Jigs
Its shorter JIS body fits tight assembly fixtures, while the adjustable stroke accommodates part variations.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20S the Right Cylinder?
Choose the MFCJ20X250-20S when you need a compact, adjustable-stroke cylinder for light-duty automation. Compare with the MFCJ25, which offers 245.3N push at 0.5 MPa, if you need more force in the same footprint. The adjustable stroke and cushion are ideal for high-speed changeovers or shock-sensitive trial fits.
Remember, this cylinder does not hold position on air loss-the piston drifts. Use an external rod lock or pilot check valve for held loads. Mounting options include LB foot, FA flange, or TC trunnion. The 1/8" port and M8x1.25 rod thread are standard.
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 MFCJ20X250-20S FAQ
At 0.5 MPa, push is 157N and pull is 131.9N. At 0.7 MPa, push is 219.8N and pull is 184.7N. The theoretical maximum force is 32 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20mm, setting the end position between 230-250mm. The -S magnet enables CMSG, DMSG, or EMSG sensors for position detection.
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.
Related AirTAC MFCJ Cylinders
Request a Quote for Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.