Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-30S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 75mm 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
- Stroke75 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 MFCJ20X75-30S
Trim the extend stroke by up to 30 mm on site and dial in a needle air cushion at each end to absorb high-speed shock. This double-acting JIS-standard round-body mini cylinder features a SUS304 stainless barrel and riveted aluminium covers, yielding a shorter mounting envelope than an ISO 6432 unit of the same bore.
Fitted with a piston magnet (-S) for CMSG, DMSG or EMSG switches, the Ø20 mm bore (1/8" port, M8x1.25 rod thread) delivers 157 N push and 131.9 N pull at 0.5 MPa. That translates to a safe working load of roughly 94 N, lifting about 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-30S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 75 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 MFCJ20X75-30S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 MFCJ20X75-30S Is Used
Light-Part Ejection
Tunes the 45-75 mm extend and end cushion to softly eject 8 kg assemblies at speed without slamming.
Divertor Gate
Dials in the exact divert stroke on-site while the needle cushion absorbs the repetitive shock of high-speed routing.
Carton Stopper
Adjusts the stop position for mixed carton sizes and uses the -S magnet with a DMSG sensor to confirm retraction.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X75-30S the Right Cylinder?
Weigh the MFCJ20 against the MFCJ25 by force: the Ø20 bore gives 157 N push at 0.5 MPa, while the Ø25 steps up to 245.3 N. Choose this adjustable-stroke, variable-cushion build for high-speed changeovers or shock-sensitive trial fits where both the 45-75 mm extend endpoint and end-of-stroke deceleration need field tuning.
Mount via LB foot, FA flange or TC trunnion (no SDB). Remember that the air cushion and adjuster only decelerate and set position—they do not lock. For a suspended load that must resist drifting on air loss, add an external rod lock or pilot 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 MFCJ20X75-30S FAQ
It has a 1/8" port and generates 157 N push / 131.9 N pull at 0.5 MPa, 219.8 N push / 184.7 N pull at 0.7 MPa, and a theoretical maximum of 32 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 30 mm (usable 45-75 mm), and the variable air cushion at both ends decelerates the piston near stroke end. It does not lock or hold position on air loss; use an external rod lock for that. The -S magnet supports CMSG, DMSG and 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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