Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SUTC
The AirTAC Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SUTC is a genuine double acting 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
- Rod threadM8×1.25
- CushionFixed TPU bumper pads
About the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SUTC
Generating 157 N of push force at 0.5 MPa, this double-acting JIS-standard round-body mini cylinder packs reliable actuation into a compact footprint. Because the SUS304 stainless steel barrel and riveted aluminium covers yield a body shorter than a comparable ISO 6432 unit, you save valuable mounting length in tight fixtures. The 1/8" port and 125 mm stroke make it highly versatile for standard automation tasks.
The internal piston relies on a two-way oil-retaining seal to maintain lubrication for long service life, while fixed TPU bumper pads and a front-cover anti-impact pad soften end-of-stroke impacts. Since this SKU includes the -S magnet, it directly supports CMSG, DMSG, and EMSG position switches. Plan for roughly 94 N of actual work at 0.5 MPa, which means it can safely lift about an 8 kg load vertically with a 2:1 safety margin.
Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SUTC Technical Specifications
| Model | Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SUTC |
|---|---|
| Series | MF JIS mini cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MF20X125SUTC
| MF | JIS-standard round-body mini cylinder (double-acting). |
|---|---|
| 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 MF20-25 Stainless Steel Mini Cylinder MF20X125SUTC Is Used
Small Part Ejection
Uses the 157 N push force to positively eject small moulded plastic parts from an assembly fixture without damaging the component surface.
Package Diverting
Actuates a lightweight sorting flap on a packaging line, where the shorter JIS body provides critical clearance in cramped conveyor tunnels.
Clamp Actuation
Drives a secondary clamping jaw on a PCB drilling station, safely holding approximately 8 kg of vertical load with a 2:1 margin.
Is the Airtac MF20-25 Stainless Steel Mini Cylinder MF20X125SUTC the Right Cylinder?
When sizing this 20 mm bore unit, stepping up to the MF25 increases your 0.5 MPa push force significantly to 245.3 N, whereas the 20 mm remains the smallest available option in the MF family. This specific configuration features a U flat-end back cover and a TC trunnion mount, providing a pivoting axis that accommodates slight misalignment. The built-in -S magnet allows seamless integration with CMSG, DMSG, or EMSG sensors for end-of-stroke confirmation.
Be aware that a plain double-acting cylinder naturally vents and drifts if air pressure drops or the valve is centred; the internal bumpers only decelerate the stroke end and do not function as a braking lock. To prevent a vertical load from falling, incorporate an external rod lock or a pilot-operated check valve into your pneumatic circuit. Additionally, at 125 mm, ensure your mounting structure fully supports the rod to avoid excessive side-loading and premature seal wear.
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 MF20X125SUTC FAQ
This 20 mm bore cylinder features a 1/8" port and an M8x1.25 male rod thread. 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 rather than an adjustable air cushion; for variable cushioning, look at the MFC variant. Furthermore, it will not hold a load if air is lost, as the piston drifts, so you must add an external rod lock or pilot check valve for position holding.
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