Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-100S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-100S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 300mm 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
- Stroke300 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 MFCJ20X300-100S
Dial in exact end positions on-site with the AirTAC MFCJ20X300-100S, a double-acting JIS-standard round-body mini cylinder featuring a 100 mm adjustable extend window (usable 200-300 mm) and needle-set variable air cushions at both ends. The riveted SUS304 stainless barrel with aluminium covers resists mild corrosion and washdown, while the compact body is shorter than an ISO 6432 unit for the same 20 mm bore and 300 mm stroke, saving valuable mounting length.
Driven by a 1/8" port and an Ø8 mm rod with an M8x1.25 male thread, this unit delivers 157 N push and 131.9 N pull at 0.5 MPa. The built-in magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing. Factoring a 2:1 safety margin, it lifts about 8 kg vertically, yielding a safe working load near 94 N. Note that the cushion only decelerates the piston near stroke end; it does not lock or hold the load on air loss.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-100S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-100S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 300 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 MFCJ20X300-100S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×300 | 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 MFCJ20X300-100S Is Used
Lightweight Trial Fits
Perfect for changeovers needing precise 200-300 mm extend tuning and smooth cushioning for 94 N loads.
High-Speed Diverters
Variable air cushions absorb end-of-stroke shock on fast 20 mm bore actuators shifting small packages.
Washdown Test Rigs
The SUS304 stainless barrel handles mild corrosion while the adjuster dials exact stroke for repetitive tests.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X300-100S the Right Cylinder?
When sizing this 20 mm bore unit against the MFCJ25 (245.3 N push at 0.5 MPa), the MFCJ20X300-100S is ideal for lighter high-speed changeovers where both the extend stroke and end-of-stroke shock require field tuning. The 100 mm adjustment window is perfect for trial fits, letting you fine-tune the extend end from 200 to 300 mm without swapping hardware. The variable air cushion soaks up kinetic energy at speeds up to 800 mm/s.
Because the piston drifts on air loss, suspend or hold loads with an external rod lock or pilot-operated check valve rather than relying on the cushion. Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover code). The -S magnet enables CMSG/DMSG/EMSG sensors; a non-S SKU cannot take a sensor.
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 MFCJ20X300-100S FAQ
This 20 mm bore cylinder uses a 1/8" port and delivers 157 N push / 131.9 N pull at 0.5 MPa, 219.8 N push / 184.7 N pull at 0.7 MPa, with a theoretical max of 32 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 100 mm (usable 200-300 mm), while the needle variable air cushion decelerates the piston at both ends. The -S suffix means it has a built-in 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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