Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-75
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-75 is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 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 MFCJ20X125-75
Dial in the exact extend position on-site with the AirTAC MFCJ20X125-75, a JIS-standard round-body mini cylinder featuring a 75 mm adjustable stroke window (usable extend 50-125 mm) and needle-set variable air cushions at both ends. The SUS304 stainless steel barrel and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit of the same bore and stroke, resisting mild washdown while saving space.
Driven by a 20 mm bore and a 1/8" port, this double-acting actuator delivers 157 N of push force at 0.5 MPa, making its safe working load roughly 94 N or about 8 kg of vertical lift with a 2:1 margin. The cushions soak up end-of-stroke shock at high speed but do not lock the load; this specific SKU lacks the -S magnet, so it cannot host CMSG, DMSG or EMSG switches.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-75 Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-75 |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MFCJ20X125-75
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MFCJ20X125-75 Is Used
Lightweight Trial Fitting
Perfect for dialing in a 50-125 mm extend during prototype assembly, using the 75 mm adjuster to find the exact contact distance without swapping cylinders.
High-Speed Diverting
Pushes small packages at speed; the variable air cushion silently decelerates the 157 N thrust at the extend end to prevent harsh impacts on the diverter arm.
Adjustable Stop Gates
Sets a precise physical stop for incoming parts on a line, allowing operators to shorten the extend stroke on the fly as product sizes change.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-75 the Right Cylinder?
When sizing these adjustable-stroke units, compare the real thrust: this 20 mm bore provides 157 N push at 0.5 MPa, whereas stepping up to the MFCJ25 yields 245.3 N. Choose the 20 mm bore for lighter, high-speed changeovers where exact end-position tuning and shock absorption matter more than raw power. If you need position feedback, select the -S magnet variant instead, as this base model cannot accept a sensor.
Mounting options include LB foot, FA flange and TC trunnion (with no SDB or back-cover option available on this adjustable build). Remember that the air cushion only decelerates the piston near the stroke end—it is not a brake. To prevent drifting on air loss, install an external rod lock or pilot-operated check valve.
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 MFCJ20X125-75 FAQ
This 20 mm bore cylinder uses a 1/8" port and an M8x1.25 male rod 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 maximum of 32 kgf at 1.0 MPa.
No, this specific SKU does not include the -S magnet, so it cannot host CMSG, DMSG or EMSG switches. The external adjuster shortens the extend stroke by up to 75 mm, and the variable air cushion decelerates the piston, but neither feature acts as a mid-stroke lock.
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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