Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40S 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
- 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 MFCJ20X100-40S
Trim the extend stroke by up to 40 mm on site and dial in a needle air cushion at each end with this AirTAC MFCJ20X100-40S double-acting mini cylinder. The riveted SUS304 stainless round body with aluminium covers is JIS-standard, packing a 100 mm stroke into a shorter envelope than an ISO 6432 unit to save mounting space while resisting mild washdown.
Driven by a 1/8" port and an Ø8 mm rod (M8x1.25 male thread), the 20 mm bore delivers 157 N push and 131.9 N pull at 0.5 MPa. That translates to a safe working load of about 94 N, lifting roughly 8 kg vertically with a 2:1 margin. The -S suffix adds a piston magnet for CMSG, DMSG or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40S |
|---|---|
| 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 MFCJ20X100-40S
| 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 MFCJ20X100-40S Is Used
High-Speed Sorter Diverter
Tune the 40 mm extend window and needle cushion to softly flick light packages at speed, using the 157 N push force without end-of-stroke slamming.
Trial-Fit Clamping Stop
Dial in the exact extend position during changeovers on a machining cell; the variable air cushion soaks up shock from the 8 kg vertical load at high cycle rates.
Lab Test Actuator
Set precise, repeatable end positions for delicate sensor testing; the SUS304 body handles mild washdown while the cushion ensures quiet, smooth deceleration.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40S the Right Cylinder?
Weigh the 20 mm bore against the MFCJ25, which steps up to 245.3 N push at 0.5 MPa. Choose this MFCJ20 when the 157 N output is sufficient and you need the lighter footprint. The 40 mm adjustable window and variable air cushion excel in high-speed changeovers where trial fits demand precise end-position tuning and shock absorption.
Mount via LB foot, FA flange or TC trunnion (no SDB or back-cover here). The cushion only decelerates near stroke end—it is not a lock; for a held load on air loss, specify an external rod lock or pilot check valve. The built-in -S magnet supports CMSG, DMSG and EMSG switches.
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 MFCJ20X100-40S FAQ
This 20 mm bore cylinder uses a 1/8" port and an Ø8 mm rod with an M8x1.25 male 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 max of 32 kgf at 1.0 MPa. Operating pressure is 0.15-1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm on site (usable extend 60-100 mm), while the variable needle air cushion at both ends decelerates the piston near stroke end for smooth high-speed motion. The cushion is not a brake or lock; the piston drifts on air loss, so use an external rod lock or pilot check valve to hold a load. The -S suffix enables CMSG, DMSG and 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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