Airtac MFJ Adjustable Mini Cylinder MFJ40X30-10S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X30-10S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 30mm stroke, 1/4" 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.
- BoreØ40 mm
- Stroke30 mm
- Port size1/4"
- Acting typeDouble acting, adjustable stroke
- Rod threadM14×1.5
- 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 MFJ40X30-10S
Trimming the extend stroke by up to 10 mm on site, the AirTAC MFJ40X30-10S lets you dial in the exact end position without buying a new cylinder or adding external stops. This JIS-standard round-body mini cylinder features a SUS304 stainless steel barrel and riveted aluminium covers, delivering a shorter mounting envelope than an ISO 6432 unit for the same 40 mm bore and 30 mm stroke.
Driven by a 16 mm rod and a 1/4" port, the 40 mm bore generates 628.3 N of push force at 0.5 MPa, yielding a safe working load of roughly 377 N or a 32 kg vertical lift with a 2:1 margin. The -S suffix equips the piston with a magnet for CMSG, DMSG or EMSG switches, while fixed TPU bumpers absorb the impact at stroke end.
Airtac MFJ Adjustable Mini Cylinder MFJ40X30-10S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X30-10S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 30 mm |
| Acting type | Double acting, adjustable stroke |
| Port size | 1/4" |
| Rod thread | M14×1.5 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | 739 N |
| Max (@1.0 MPa) | 128 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 MFJ40X30-10S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×30 | 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 MFJ40X30-10S Is Used
Changeover Stations
Fine-tune the extend endpoint within the 10 mm window during product line changeovers, using the 628.3 N push force to seat varying tooling lengths without swapping cylinders.
Trial Fit Rigs
Dial in the exact reach on prototype assembly rigs where the final stop position is unknown, leveraging the 377 N safe working load to test part placement.
Variable Position Stops
Adjust the extend stroke on the fly for delicate clamping tasks, preventing over-travel on fragile components while the SUS304 barrel resists mild washdown.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X30-10S the Right Cylinder?
Choose the MFJ40 over the smaller MFJ32 when you need more push: the 40 mm bore delivers 628.3 N at 0.5 MPa versus 402.2 N for the 32 mm bore. This adjustable model is ideal for changeover stations and trial fits where the exact extend position is not final, as the external adjuster shortens the stroke within the 10 mm window. Mount using LB foot, FA flange or TC trunnion brackets (SDB is not available). Remember that the bumper decelerates the stroke but does not lock the rod; for vertical loads that must hold position on air loss, add an external rod lock or pilot check valve.
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 MFJ40X30-10S FAQ
This 40 mm bore cylinder has a 1/4" port and a 16 mm rod. At 0.5 MPa it pushes with 628.3 N and pulls with 527.8 N. At 0.7 MPa the push is 879.6 N and pull is 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 10 mm on site, but it cannot extend the stroke beyond the 30 mm base or lock the load mid-stroke. The -S suffix means a piston magnet is built in, allowing you to mount CMSG, DMSG or EMSG sensors for position detection.
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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.
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Most inquiries answered within 7-8 hours.
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