Airtac MFCJ Adjustable Mini Cylinder MFCJ20X30-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X30-30S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 30mm 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
- Stroke30 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 MFCJ20X30-30S
Dial in exact extend positions on-site with the AirTAC MFCJ20X30-30S, a JIS-standard round-body mini cylinder featuring a 30 mm adjustable stroke window and needle-set variable air cushions at both ends. The SUS304 stainless steel barrel and riveted aluminium covers yield a shorter mounting envelope than an ISO 6432 unit of the same bore, while resisting mild washdown corrosion. Equipped with a 1/8" port and an M8x1.25 male rod thread, it delivers 157 N of push force at 0.5 MPa.
This double-acting actuator soaks up high-speed end-of-stroke shock, making it perfect for sensitive trial fits where both travel length and deceleration need tuning. The integrated -S piston magnet supports CMSG, DMSG, or EMSG reed and electronic switches for position sensing. Based on the 0.5 MPa thrust, it handles a safe working load of roughly 94 N, lifting about 8 kg vertically with a 2:1 margin.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X30-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X30-30S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 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 MFCJ20X30-30S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×30 | 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 MFCJ20X30-30S Is Used
Light-Part Trial Fits
Use the 30 mm adjuster to fine-tune the extend reach during changeovers, gently pressing sub-8 kg components while the needle cushion prevents impact damage at high speed.
High-Speed Diverting
Sort small items on a compact line using the 157 N push force, relying on the variable air cushion to absorb end-of-stroke shock without exceeding the 30 mm travel window.
Lab Dispense Positioning
Dial in precise nozzle drop distances on benchtop equipment; the SUS304 barrel handles mild splashing while the -S magnet tracks exact extension for electronic sensors.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X30-30S the Right Cylinder?
When sizing this series, compare the bores directly: this 20 mm bore provides 157 N push at 0.5 MPa, whereas stepping up to the MFCJ25 yields 245.3 N. Choose the 20 mm variant for lighter, high-speed changeovers where space is tight and shock deceleration is critical. Note that the external adjuster only shortens the extend stroke within its 30 mm window; it does not lock the piston mid-travel.
Because the variable air cushion only decelerates near the stroke end and the cylinder drifts on air loss, you must add an external rod lock or pilot-operated check valve for suspended loads. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover here). The -S magnet is already present, so you can directly fit CMSG, DMSG, or EMSG sensors without modifying the cylinder.
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 MFCJ20X30-30S FAQ
This 20 mm bore double-acting cylinder uses a 1/8" port and operates at 30-800 mm/s. 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 30 mm, and the variable air cushion at both ends decelerates the piston near stroke end for smooth high-speed stops. The cushion is not a brake; the cylinder drifts on air loss, so use an external rod lock to hold suspended loads. The -S magnet allows CMSG, DMSG, and EMSG sensors for position feedback.
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.
Related AirTAC MFCJ Cylinders
Request a Quote for Airtac MFCJ Adjustable Mini Cylinder MFCJ20X30-30S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.