Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-30S 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 MFCJ20X250-30S
Dial in exact end positions on-site with the AirTAC MFCJ20X250-30S, a JIS-standard round-body mini cylinder featuring a 30mm adjustable extend window (usable 220-250mm) and variable air cushions at both ends. The riveted SUS304 stainless barrel with aluminium covers resists mild corrosion and washdown, while delivering a shorter overall mounting length than a comparable ISO 6432 unit.
Driven by filtered air at 0.15-1.0 MPa through a 1/8" port, this double-acting actuator generates 157N of push force at 0.5 MPa. The built-in piston magnet (-S) supports CMSG, DMSG, and EMSG switches for position sensing. It yields a safe working load of roughly 94N, lifting about 8kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-30S |
|---|---|
| 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 MFCJ20X250-30S
| 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 MFCJ20X250-30S Is Used
Light Package Diverter
Tunes the extend stroke by up to 30mm to hit varying lane widths precisely, while the air cushion absorbs high-speed shocks when redirecting lightweight boxes.
Micro-Clamp Actuator
Provides a 94N safe working load for delicate part holding, allowing operators to dial in the exact clamping reach without changing the physical cylinder mount.
Lab Dispense Head
Offers washdown-resistant SUS304 construction and adjustable end-positioning for trial fits, ensuring smooth deceleration of the 8kg vertical lift at cycle end.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X250-30S the Right Cylinder?
Weigh your force needs between the compact bores: this 20mm unit provides 157N push at 0.5 MPa, whereas stepping up to the MFCJ25 yields 245.3 N. Choose the 20mm bore when moving lighter payloads at high speeds, relying on the needle air cushion to soak up end-of-stroke shock during rapid changeovers. The external adjuster only shortens the extend stroke to fine-tune the end position; it does not lock the piston mid-stroke.
For mounting, select LB foot, FA flange, or TC trunnion brackets (SDB and back-cover options are absent on this adjustable build). Because the -S magnet is present, you can directly fit CMSG, DMSG, or EMSG sensors. Remember that air loss will cause the load to drift, as the cushion decelerates but does not brake or hold the rod, requiring an external pilot check valve for suspended loads.
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 MFCJ20X250-30S FAQ
This 20mm bore cylinder uses a 1/8" port and an M8x1.25 male rod thread. It generates 157N push and 131.9N pull at 0.5 MPa, 219.8N push and 184.7N pull at 0.7 MPa, with a theoretical maximum force of 32 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 30mm (usable range 220-250mm), while the needle variable air cushion at both ends decelerates the piston near stroke end. The -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG sensors; the cushion decelerates but does not lock or hold the load.
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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