Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120SU
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120SU is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 120mm 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
- Stroke120 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
- 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 MF20-25 Stainless Steel Mini Cylinder MF20X120SU
Delivering 157 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder is built for tight spaces. Its SUS304 stainless steel barrel and riveted aluminium covers shrug off mild washdown, while the internal two-way seal retains an oil film for long service life. Because the MF body is shorter than an ISO 6432 cylinder for the same 120 mm stroke, it trims valuable mounting length from your fixture. The integrated U flat-end back cover further streamlines the rear profile.
Equipped with a built-in piston magnet (-S), the unit supports CMSG, DMSG and EMSG reed or electronic switches for position sensing. Fixed TPU bumper pads and a front-cover anti-impact pad soften the stroke-end impact without the complexity of adjustable cushioning. For practical actuation at 0.5 MPa, plan for roughly 94 N of real work, which translates to lifting about 8 kg vertically with a 2:1 safety margin.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120SU Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120SU |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 120 mm |
| Acting type | Double acting |
| 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 | Fixed TPU bumper pads |
| 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 MF20-25 Stainless Steel Mini Cylinder MF20X120SU
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×120 | 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 MF20-25 Stainless Steel Mini Cylinder MF20X120SU Is Used
Electronic Component Sorting
Pushes PCBs or small connectors down a testing lane with 157 N at 0.5 MPa, using the U flat-end rear cover to sit flush against the machine frame.
Small Carton Flap Folding
Extends 120 mm to tuck lightweight cardboard flaps prior to sealing, where the compact JIS body length saves valuable packaging line real estate.
Parts Diverting Gate
Actuates a lightweight routing flap to divert small plastic parts, relying on the -S magnet and EMSG sensors to confirm gate position.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X120SU the Right Cylinder?
When sizing this 20 mm bore, the adjacent MF25 provides a heavier 245.3 N push at 0.5 MPa if your payload exceeds the 8 kg vertical lift threshold. If air pressure drops or the valve centres, a standard MF cylinder cannot hold the load and the piston will drift; the bumpers only decelerate the stroke end rather than locking it. For suspended loads, specify an external rod lock or a pilot-operated check valve. The 1/8" port and M8x1.25 male rod thread match standard mini-fixture plumbing, and you can mount via LB foot, FA flange, SDB pivot or TC trunnion. At a 120 mm stroke, keep the side-load minimal to avoid rod bending.
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 MF20-25 Stainless Steel Mini Cylinder MF20X120SU 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 force of 32 kgf at 1.0 MPa.
No, the base MF uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable cushion. For variable cushioning, look at the MFC variant. This model's SUS304 riveted round-body is also shorter than an ISO 6432 cylinder.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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