Airtac MFCJ Adjustable Mini Cylinder MFCJ20X25-20
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X25-20 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 25mm 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
- Stroke25 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 MFCJ20X25-20
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ20X25-20, a JIS-standard round-body mini cylinder. An external adjuster shortens the extend stroke by up to 20 mm, giving a usable 5-25 mm extend window, while needle valves set a variable air cushion at both ends. The riveted SUS304 stainless barrel and aluminium covers yield a body shorter than an ISO 6432 unit for the same 25 mm stroke, saving mounting length.
This double-acting 20 mm bore generates 157 N push and 131.9 N pull at 0.5 MPa, peaking at a theoretical 32 kgf. That translates to a safe working load around 94 N, or lifting about 8 kg vertically with a 2:1 margin. It uses a 1/8" port and an Ø8 mm rod. Note this SKU lacks a magnet, so it cannot take CMSG/DMSG/EMSG switches; order the -S variant for sensing.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X25-20 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X25-20 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 25 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 MFCJ20X25-20
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×25 | 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 MFCJ20X25-20 Is Used
Micro-Clamp Trial Fits
Dial in the exact 5-25 mm extend position on delicate workholding, using the variable air cushion to prevent impact damage on parts weighing under 8 kg.
Light Divertor Arms
Fine-tune the stroke length on site for small package routing, absorbing the end-of-travel shock to keep the 157 N push motion quiet at high cycle rates.
Lab Pick-and-Place
Ideal for compact 1/8" ported setups needing a shorter body than ISO 6432, where the 20 mm adjuster window handles varying sample sizes without swapping cylinders.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X25-20 the Right Cylinder?
Choose between the 20 mm and 25 mm bores based on your force needs. This MFCJ20X25-20 provides 157 N push at 0.5 MPa, while the larger MFCJ25 delivers 245.3 N. If your changeover requires precise trial fits and smooth high-speed deceleration, the 20 mm bore with its 20 mm adjustable window and dual variable air cushions excels. Mount via LB foot, FA flange, or TC trunnion (no SDB). Remember the cushion only decelerates near stroke end; for load holding on air loss, fit an external rod lock or pilot check valve.
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 MFCJ20X25-20 FAQ
This 20 mm bore cylinder uses a 1/8" port. At 0.5 MPa it provides 157 N push and 131.9 N pull. At 0.7 MPa it provides 219.8 N push and 184.7 N pull. The theoretical maximum force is 32 kgf at 1.0 MPa.
This specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. The external adjuster only shortens the extend end position (by up to 20 mm); it is not a mid-stroke lock. The variable air cushion strictly decelerates the piston near the ends.
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 MFCJ20X25-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.