Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-20S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 100mm 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
- Stroke100 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke + cushion
- Rod threadM8×1.25
- CushionVariable air cushion, both ends
About the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-20S
Dial in your extend end-point within an 80 to 100 mm window using the external adjuster, which can shorten the forward stroke by up to 20 mm. This double-acting JIS-standard round-body mini cylinder pairs that on-site stroke flexibility with a variable needle air cushion at both ends to absorb high-speed shocks.
The SUS304 stainless steel barrel and riveted aluminium covers yield a footprint shorter than an ISO 6432 unit for the same bore and stroke, resisting mild washdown corrosion. With a 20 mm bore, 1/8" port, and M8x1.25 male rod thread, it delivers 157 N of push force at 0.5 MPa. The integrated -S magnet supports CMSG, DMSG, or EMSG position switches for automated feedback.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 100 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 MFCJ20X100-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×100 | 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 MFCJ20X100-20S Is Used
Light-Part Ejection
Tune the 20 mm extend window to dial in the exact push distance for small plastic parts, letting the variable air cushion silently absorb the 157 N impact at high cycle rates.
Package Diverting
Adjust the stroke on the fly for varying carton sizes while the double-acting force and end cushions ensure smooth, non-jarring contact across the conveyor belt.
Lab Test Positioning
The SUS304 stainless body withstands wipe-downs in lab settings, and the fine 20 mm stroke adjustment lets operators find the perfect travel for delicate sensor probes.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-20S the Right Cylinder?
Weigh this 20 mm bore option pushing 157 N at 0.5 MPa against the larger MFCJ25, which pushes 245.3 N at the same pressure. This compact build is ideal for high-speed changeovers or trial fits where both the end-of-stroke shock and the exact 80 to 100 mm extend position need on-site tuning. The needle cushion only decelerates the piston near the ends; it does not lock the load. If you need to hold a vertical load during air loss, install an external rod lock or pilot check valve. Mount via LB foot, FA flange, or TC trunnion (no SDB), and use the built-in magnet for your 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 MFCJ20X100-20S FAQ
This 20 mm bore cylinder features a 1/8" port and generates a push force of 157 N and a pull force of 131.9 N at 0.5 MPa. At 0.7 MPa, push is 219.8 N and pull is 184.7 N. The theoretical maximum force is 32 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm (usable range 80-100 mm), and the variable air cushion at both ends decelerates the piston at high speeds. The cushion is not a brake; the piston will drift on air loss. The -S suffix means it includes a magnet for CMSG, DMSG, or EMSG sensors.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
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