Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-10S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-10S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 250mm 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
- Stroke250 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 MFCJ20X250-10S
Tune the extend travel on-site with the AirTAC MFCJ20X250-10S, a JIS-standard round-body mini cylinder that lets you shorten the extend stroke by up to 10 mm (usable range 240-250 mm) while retract stays full. The built-in magnet (-S) supports CMSG, DMSG and EMSG switches for position sensing.
Featuring a variable air cushion at both ends, it soaks up high-speed shock for quiet motion. The SUS304 stainless steel barrel and riveted aluminium covers resist mild washdown. Delivering 157 N push at 0.5 MPa via a 1/8" port, it yields a safe working load of about 94 N (roughly 8 kg vertical lift with a 2:1 margin). Its compact body is shorter than an ISO 6432 cylinder for the same stroke.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-10S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-10S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 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 MFCJ20X250-10S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×250 | 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 MFCJ20X250-10S Is Used
High-Speed Trial Fits
Dial in the 10 mm extend window and needle the air cushion to absorb shock when testing fragile 8 kg assemblies at speed.
Light Diverting
Use the 157 N push force to deflect small cartons on a line, adjusting the extend end on-site without swapping cylinders.
Lab Changeovers
The SUS304 barrel handles mild washdown; tune stroke and cushioning quickly for varying test jigs without re-plumbing the 1/8" port.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-10S the Right Cylinder?
Choose the MFCJ20 (157 N push @0.5 MPa) for lighter pick-and-place or trial fits where exact end-position and end-of-stroke shock both need tuning; step up to the MFCJ25 (245.3 N @0.5 MPa) if the load exceeds the 8 kg vertical margin. The external adjuster sets the extend end point, but it is not a mid-stroke lock.
This double-acting cylinder drifts on air loss—the cushion only decelerates near the end. For a held load, specify an external rod lock or pilot check valve. Mount via LB foot, FA flange or TC trunnion (no SDB or back-cover here). The -S magnet enables CMSG/DMSG/EMSG sensors.
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 MFCJ20X250-10S FAQ
This double-acting cylinder has a 20 mm bore, an 8 mm rod, and a 1/8" port. It delivers 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.
The external adjuster shortens the extend stroke by up to 10 mm (usable 240-250 mm); retract remains full. The variable air cushion at both ends only decelerates the piston near stroke end—it is not a lock or brake. The -S magnet enables CMSG, DMSG and EMSG sensors.
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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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