Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø25mm bore and 50mm 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.
- BoreØ25 mm
- Stroke50 mm
- Port size1/8"
- Acting typeDouble acting, adjustable stroke
- Rod threadM10×1.25
- 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 MFJ Adjustable Mini Cylinder MFJ25X50-50S
Fine-tune your extend end position on-site with the AirTAC MFJ25X50-50S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the extend stroke by up to 50 mm, making it highly effective for trial fits and line changeovers where the exact end position is not yet final. The retract stroke remains full length.
Delivering 245.3 N of push force at 0.5 MPa, this double-acting actuator provides a safe working load of about 147 N and lifts roughly 12.5 kg vertically with a 2:1 margin. Because the -S suffix denotes a built-in piston magnet, you can mount CMSG, DMSG, or EMSG sensors directly for position detection. The body is purposefully shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting length without conforming to that standard.
Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø25 mm |
| Stroke | 50 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/8" |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | 289 N |
| Max (@1.0 MPa) | 50 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 25 | Bore size in mm. |
| ×50 | 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 MFJ Adjustable Mini Cylinder MFJ25X50-50S Is Used
Changeover Positioning
Dial in the extend stroke by up to 50 mm during product changeovers, allowing rapid line adjustments without physically replacing the cylinder.
Trial Fit Rigs
Perfect for prototype assembly rigs where the exact end position is unknown, safely moving a 12.5 kg vertical load within a 2:1 safety margin.
Variable Stop Mechanisms
Acts as an adjustable mechanical stop delivering 245.3 N of push force, letting operators fine-tune part ejection distances on the fly.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ25X50-50S the Right Cylinder?
When sizing these adjustable cylinders, compare the real thrust figures: the MFJ20 delivers 157 N of push force at 0.5 MPa, this MFJ25 provides 245.3 N, and the larger MFJ32 outputs 402.2 N. Choose the 25 mm bore when your application requires roughly 147 N of safe working load. The 50 mm adjustable window is ideal if your line changeovers demand variable positioning stops without swapping hardware.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover option exists for this build). Remember that the fixed TPU bumper pads only decelerate the stroke end; they do not lock the piston. If you need to hold a load vertically during air loss, add an external rod lock or pilot-operated check valve, as the cylinder will drift.
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 MFJ Adjustable Mini Cylinder MFJ25X50-50S FAQ
This 25 mm bore cylinder features a 1/8" air port and an M10x1.25 male rod thread. It delivers 245.3 N push and 206.1 N pull at 0.5 MPa, 343.4 N push and 288.5 N pull at 0.7 MPa, with a theoretical maximum of 50 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa.
The external adjuster shortens the extend stroke by up to 50 mm on-site without changing the cylinder itself; the retract stroke remains full. The -S suffix means it has a built-in piston magnet for CMSG, DMSG, or EMSG switches. It uses fixed TPU bumper pads for end deceleration, not an adjustable air cushion.
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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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