Airtac MF20-25 Stainless Steel Mini Cylinder MF20X105U
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X105U is a genuine double acting JIS-standard round-body mini air cylinder with a Ø20mm bore and 105mm 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
- Stroke105 mm
- Port size1/8"
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X105U
Delivering 157 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder features a SUS304 stainless-steel barrel with riveted aluminium covers. Because the MF body is physically shorter than a comparable ISO 6432 unit for the same 20 mm bore and 105 mm stroke, it saves valuable mounting length in tight fixtures. The 1/8" port and M8x1.25 male rod thread keep pneumatic connections compact.
The piston relies on a heterogeneous two-way seal that retains an oil film for long service life, while fixed TPU bumper pads and a front-cover anti-impact pad soften stroke-end impacts. Plan for roughly 94 N of actual work at 0.5 MPa, which translates to lifting about 8 kg vertically with a 2:1 safety margin. This specific SKU lacks a magnet, so it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X105U Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X105U |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 105 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 MF20X105U
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 20 | Bore size in mm. |
| ×105 | 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 MF20X105U Is Used
Small Part Ejection
Pushes lightweight plastic mouldings out of an injection press with 157 N at 0.5 MPa, safely under the 94 N working load guideline.
Package Diverting
Extends 105 mm to deflect small cartons on a packaging line, fitting neatly into compact conveyor frames thanks to the short JIS body.
Clamp Actuation
Secures thin sheet metal in a welding jig; the U flat-end cover mounts flush to the machine frame while the TPU bumpers absorb stroke impacts.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X105U the Right Cylinder?
When sizing this 20 mm bore, stepping up to the MF25 increases your 0.5 MPa push force to 245.3 N for heavier loads, while no smaller MF bore exists if you need less force. The included U flat-end back cover suits direct rear mounting, and you can pair the body with LB foot, FA flange, SDB pivot, or TC trunnion brackets. If your mechanism drops air pressure or the valve centres, this plain cylinder will drift and cannot hold a load; the bumpers only decelerate the stroke end, so add an external rod lock or pilot check valve for vertical holding. At 105 mm, watch rod bending under heavy side loads.
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 MF20X105U FAQ
At 0.5 MPa it pushes with 157 N and pulls with 131.9 N. At 0.7 MPa it pushes 219.8 N and pulls 184.7 N. The theoretical maximum force is 32 kgf at 1.0 MPa. This 20 mm bore cylinder uses a 1/8" air port and an M8x1.25 male rod thread.
No, this specific SKU does not have the -S magnet option, so it cannot accept CMSG, DMSG, or EMSG magnetic switches. You would need the -S variant for sensing. The body uses fixed TPU bumper pads for deceleration rather than an adjustable air cushion, and the U flat-end back cover allows direct mounting.
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