Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40 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 MFCJ20X100-40
Tune both travel and end-of-stroke shock on site with this double-acting mini cylinder, which lets you trim the extend stroke by up to 40 mm and dial in a needle air cushion at each end. The JIS-standard riveted round body uses a SUS304 stainless barrel with aluminium covers, giving you a shorter mounting envelope than an ISO 6432 unit while resisting mild washdown.
Fitted with an 8 mm rod, an M8x1.25 male thread and a 1/8" port, this 20 mm bore build delivers 157 N of push force at 0.5 MPa. That translates to a safe working load of about 94 N, or roughly 8 kg of vertical lift with a 2:1 margin. Note that this specific SKU lacks a magnet, so it cannot host CMSG, DMSG or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40 |
|---|---|
| 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 MFCJ20X100-40
| 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 MFCJ20X100-40 Is Used
Light Part Insertion
Dial in the exact 60-100 mm extend depth for delicate electronic inserts, using the 40 mm adjuster and air cushion to prevent impact damage at high speed.
Sorting Diverter
Trim the stroke on the fly during product changeovers; the 157 N push force handles light packages while the needle cushion absorbs end shock.
Film Feed Roll
Fine-tune the push length for packaging film feeds, relying on the variable air cushion to decelerate the 8 mm rod smoothly during rapid cycling.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X100-40 the Right Cylinder?
Weigh this 20 mm bore against the MFCJ25, which steps up to 245.3 N of push force at 0.5 MPa. Choose the MFCJ20X100-40 when your changeover requires precise 60 to 100 mm extend tuning combined with high-speed cushioning, and pick the 25 mm if you need extra thrust. Both share the 1/8" port and 30-800 mm/s speed range.
The external adjuster sets the extend end position but does not lock the piston mid-stroke; the cylinder will drift on air loss, so add an external rod lock or pilot check valve for suspended loads. Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover here). If you need position feedback, specify the -S magnet variant to enable 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 MFCJ20X100-40 FAQ
This 20 mm bore cylinder features a 1/8" port and an 8 mm rod. 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.
This specific SKU has no magnet and cannot take CMSG, DMSG or EMSG sensors; you need the -S variant for position feedback. The external adjuster shortens the extend stroke by up to 40 mm, and the variable air cushion at both ends only decelerates the piston near stroke end—it is not a lock.
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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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