Airtac MFCJ Adjustable Mini Cylinder MFCJ25X20-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ25X20-20S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø25mm bore and 20mm 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.
- BoreØ25 mm
- Stroke20 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM10×1.25
- 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 MFCJ25X20-20S
Tune both the extend end-position and the end-of-stroke shock directly on the machine with this JIS-standard round-body mini cylinder. The MFCJ25X20-20S features a 20 mm adjustable stroke window and a needle-set variable air cushion at both ends, ensuring smooth deceleration for high-speed 30-800 mm/s motion. Its SUS304 stainless barrel and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit while resisting mild washdown corrosion.
Fitted with a 1/8" port and a 10 mm rod (M10x1.25 thread), this double-acting actuator delivers 245.3 N of push force at 0.5 MPa. The built-in piston magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing. For sizing, it provides a safe working load of roughly 147 N, lifting about 12.5 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ25X20-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ25X20-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 20 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 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 MFCJ25X20-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 25 | Bore size in mm. |
| ×20 | 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 MFCJ25X20-20S Is Used
Light Parts Ejection
Dial in the exact 0-20 mm extend position and cushion needle to quietly eject 12.5 kg assemblies off a conveyor without slamming.
High-Speed Trial Fits
Ideal for changeovers where the 245.3 N push force must seat delicate components precisely, letting operators shorten the stroke on-site to find zero.
Compact Clamping
Use the shorter JIS body to clamp small workpieces in tight cells, relying on the variable air cushion to absorb the 30-800 mm/s end impact.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ25X20-20S the Right Cylinder?
Choose this 25 mm bore when you need more force than an MFCJ20 (157 N push @0.5 MPa) but lack the space for an MFCJ32 (402.2 N push @0.5 MPa). The 20 mm adjustable window is perfect for trial fits and high-speed changeovers where the exact extend position and cushion needle both require field tuning. Mount via LB foot, FA flange or TC trunnion (no SDB or back-cover option exists on this adjustable build).
Because the -S magnet is present, you can directly mount CMSG, DMSG or EMSG sensors. Remember that the air cushion only decelerates the piston near the stroke end—it is not a brake. If the load must be held during air loss, install an external rod lock or pilot check valve, as the piston will drift.
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 MFCJ25X20-20S FAQ
This double-acting cylinder uses a 1/8" port and a 10 mm rod. It generates 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm on-site, while the needle variable air cushion at both ends decelerates the piston at high speed. The -S suffix means it has a built-in magnet for CMSG, DMSG or EMSG sensors; the cushion is for shock absorption only and does not lock the load.
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 MFCJ25X20-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.