Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 50mm 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
- Stroke50 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 MFCJ20X50-50S
Dial in exact extend lengths and tame high-speed end shocks with the AirTAC MFCJ20X50-50S. This double-acting JIS-standard round-body mini cylinder features a 50mm adjustable stroke window and variable needle air cushions at both ends. Built with a SUS304 stainless barrel and riveted aluminium covers, the compact riveted body is notably shorter than a comparable ISO 6432 unit, saving valuable mounting length while resisting mild washdown corrosion.
Driven by a 1/8" port and an Ø8 mm piston rod with an M8x1.25 male thread, it delivers 157 N of push force at 0.5 MPa. Because this SKU includes the -S magnet, it is fully ready for CMSG, DMSG, or EMSG position switches. For sizing, it yields a safe working load of roughly 94 N, meaning it can vertically lift about 8 kg with a 2:1 safety margin. Note that the cushion only decelerates the load near stroke end; use an external rod lock or pilot check valve if you need to hold position on air loss.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 50 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 MFCJ20X50-50S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MFCJ20X50-50S Is Used
Light-Part Trial Fits
Perfect for dialing in a 0-50 mm extend during prototype changeovers, using the adjuster to find the exact push depth for small component seating without swapping cylinders.
High-Speed Diverter
Handles rapid package diverting on conveyors where the variable air cushion soaks up end-of-stroke shock, protecting the 8 kg load capacity from harsh impacts.
Lab Automation Jig
Ideal for compact lab testing jigs needing precise position confirmation via CMSG sensors, with the SUS304 barrel resisting mild chemical washdowns.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X50-50S the Right Cylinder?
When choosing between the available bores, weigh the 157 N push force of this 20 mm unit against the 245.3 N output of the MFCJ25 at 0.5 MPa. This smaller bore is ideal for lighter, high-speed changeovers where minimizing footprint matters. The external adjuster lets you shorten the extend stroke on-site by up to 50 mm—perfect for trial fits where the exact end position is unknown—while the needle cushions absorb the resulting impact.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover code exists for this adjustable build). Since this model carries the -S suffix, you can directly mount CMSG, DMSG, or EMSG sensors for end-position confirmation. Remember that the adjuster sets the end position and the cushion sets the deceleration rate; neither acts as a mid-stroke lock or brake.
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 MFCJ20X50-50S FAQ
This 20 mm bore cylinder uses a 1/8" port. 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.
The external adjuster shortens the extend stroke by up to 50 mm on-site, while the variable air cushion at both ends uses a needle valve to decelerate the piston for smooth stops. The cushion is not a brake; for holding a load on air loss, install an external rod lock or pilot check valve. The -S magnet allows use of CMSG, DMSG, or EMSG switches.
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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