Airtac MFCJ Adjustable Mini Cylinder MFCJ20X40-10
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X40-10 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 40mm 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
- Stroke40 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 MFCJ20X40-10
Dial in exact end positions and absorb high-speed shock with this double-acting, JIS-standard round-body mini cylinder. An external adjuster lets you shorten the extend stroke by up to 10 mm on site, while the needle-set variable air cushion at both ends soaks up end-of-stroke impact. The SUS304 stainless barrel and riveted aluminium covers resist mild corrosion and washdown.
Fitted with a 1/8" port and an Ø8 mm rod, it delivers 157 N of push force at 0.5 MPa. This yields a safe working load around 94 N, lifting about 8 kg vertically with a 2:1 margin. Note this SKU lacks a magnet, so it cannot take CMSG/DMSG/EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X40-10 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X40-10 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 40 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 MFCJ20X40-10
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×40 | 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 MFCJ20X40-10 Is Used
Light Parts Trial Fit
Use the 10 mm extend adjuster to trial-fit delicate components on automated lathes, relying on the 94 N safe working load for precise, non-destructive seating.
High-Speed Diverting
Tune the stroke end position on the fly for varying package sizes, letting the variable air cushion quietly absorb the impact of fast 30-800 mm/s routing movements.
Lab Test Positioning
Lift approximately 8 kg of test apparatus vertically and fine-tune the extension by up to 10 mm, ensuring repeatable contact without harsh end-of-stroke slamming.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X40-10 the Right Cylinder?
Choose between the compact MFCJ20 and the larger MFCJ25. The MFCJ20 provides 157 N of push force at 0.5 MPa, while the MFCJ25 steps up to 245.3 N. Pick the 20 mm bore for lighter, high-speed changeovers where exact stroke tuning and shock absorption matter. Both offer LB foot, FA flange, and TC trunnion mounts.
Remember that the air cushion only decelerates the piston near the end of travel; it is not a lock. If your application must hold a load on air loss, add an external rod lock or pilot check valve. For position sensing, select the -S magnet variant instead of this base model.
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 MFCJ20X40-10 FAQ
This cylinder uses a 1/8" port and an Ø8 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 maximum of 32 kgf at 1.0 MPa.
No, this specific SKU does not include a magnet and cannot accept CMSG, DMSG, or EMSG switches. You must select the -S variant for sensing. The 10 mm external adjuster only shortens the extend stroke and the air cushion only decelerates; neither acts as a mid-stroke lock.
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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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