Airtac MFCJ Adjustable Mini Cylinder MFCJ20X45-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X45-20S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 45mm 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
- Stroke45 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 MFCJ20X45-20S
Dial in exact end positions on-site with the AirTAC MFCJ20X45-20S, a JIS-standard round-body mini cylinder featuring a 20mm adjustable extend window and variable air cushioning at both ends. The external adjuster shortens the extend stroke down to 25mm from its 45mm maximum, while the needle cushions soak up high-speed shock for smooth, quiet operation.
Built with a SUS304 stainless steel barrel and riveted aluminium covers, this double-acting actuator provides 157N of push force at 0.5MPa via its 1/8" port, yielding a safe working load of roughly 94N. The riveted body is shorter than an equivalent ISO 6432 cylinder, saving valuable mounting length. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG position sensing.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X45-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X45-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 45 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 MFCJ20X45-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×45 | 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 MFCJ20X45-20S Is Used
Light Part Trial Fit
Use the 20mm adjustable window to micro-tune the extend position during prototype assembly, letting the needle cushion gently stop the 157N push force without slamming delicate components.
Variable Depth Sealing
Adjust the extend stroke on the fly for different carton depths, relying on the variable air cushion to absorb high-speed impact at the end of every motion cycle.
Compact Sensor Routing
Leverage the shorter JIS body and -S magnet to confirm end positions with DMSG switches in tight transfer modules where ISO 6432 lengths would not fit.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X45-20S the Right Cylinder?
When sizing this 20mm bore actuator against the MFCJ25, compare the real thrust: this model pushes 157N at 0.5MPa, while the MFCJ25 delivers 245.3N. Choose the 20mm bore for lighter, high-speed changeovers where shock-sensitive trial fits demand both a tuned stroke and end cushioning. For heavier loads, step up to the 25mm bore.
Remember that the air cushion only decelerates the piston near the end of stroke; it does not lock or hold the load. If air pressure drops, the piston will drift, so fit an external rod lock or pilot check valve for suspended loads. Mounting options include LB foot, FA flange and TC trunnion (no SDB), and the built-in 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 MFCJ20X45-20S FAQ
This 20mm bore cylinder features a 1/8" port and an 8mm rod. It generates 157N push and 131.9N pull at 0.5MPa, 219.8N push and 184.7N pull at 0.7MPa, with a theoretical maximum force of 32kgf at 1.0MPa.
The external adjuster shortens the extend stroke by up to 20mm from the 45mm maximum, while the needle variable air cushion at both ends decelerates the piston for smooth stops. The -S suffix means it includes a 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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