Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-30S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-30S is a genuine double acting, adjustable stroke + cushion JIS-standard round-body mini air cylinder with a Ø20mm bore and 125mm 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
- Stroke125 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 MFCJ20X125-30S
Tune extend travel on-site with the AirTAC MFCJ20X125-30S, a JIS-standard round-body mini cylinder offering a 30 mm adjustment window (usable extend 95-125 mm) alongside needle-set variable air cushions at both ends. The riveted SUS304 stainless barrel and aluminium covers yield a body that is physically shorter than an ISO 6432 cylinder for the same 20 mm bore and 125 mm stroke, saving mounting length while resisting mild washdown.
Delivering 157 N push and 131.9 N pull at 0.5 MPa on a 1/8" port, this double-acting actuator provides a safe working load of roughly 94 N and lifts about 8 kg vertically with a 2:1 margin. The -S suffix denotes a built-in piston magnet for CMSG, DMSG or EMSG switches, and the cushion purely decelerates the piston near stroke end without acting as a lock.
Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-30S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-30S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MFCJ20X125-30S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MFCJ20X125-30S Is Used
Lightweight Trial Fits
Dial in the exact 95-125 mm extend position during automated assembly changeovers, letting the variable cushion absorb high-speed impacts without jarring delicate 8 kg workpieces.
Carton Flap Tucking
Adjust the extend stroke on the fly to match varying box depths, using the 157 N push force to cleanly fold flaps while the needle cushion guarantees smooth end-of-stroke deceleration.
Lab Dispense Positioning
Fine-tune the extend end-point within the 30 mm window for precise fluid dispensing heads, relying on the SUS304 barrel for mild corrosion resistance in wet test environments.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ20X125-30S the Right Cylinder?
When sizing this adjustable family, compare both directions: this 20 mm bore yields 157 N push at 0.5 MPa, whereas stepping up to the MFCJ25 provides 245.3 N. Choose the 20 mm bore for lighter, high-speed changeovers where exact end-position tuning and shock absorption are critical. The external adjuster only shortens the extend stroke; it does not lock the piston mid-travel.
For position holding on air loss, fit an external rod lock or pilot-operated check valve, as the piston will drift. Mount via LB foot, FA flange or TC trunnion (no SDB or back-cover here), and leverage the -S magnet for CMSG/DMSG/EMSG sensor integration.
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 MFCJ20X125-30S FAQ
This 20 mm bore cylinder uses a 1/8" port and delivers 157 N push / 131.9 N pull at 0.5 MPa, 219.8 N push / 184.7 N pull at 0.7 MPa, with a theoretical maximum of 32 kgf at 1.0 MPa.
An external adjuster shortens the extend stroke by up to 30 mm (usable 95-125 mm), while the variable air cushion at both ends decelerates the piston near stroke end. It does not lock or hold the load on air loss; use an external rod lock for that. The -S suffix enables 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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