Airtac MFJ Adjustable Mini Cylinder MFJ40X150-30S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X150-30S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 150mm 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
- Stroke150 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 MFJ40X150-30S
Trimming the extend stroke by up to 30 mm on site, this double-acting JIS-standard round-body mini cylinder removes the need for external stops during line changeovers. The riveted aluminium covers and SUS304 stainless barrel yield a shorter overall length than an equivalent ISO 6432 unit, resisting mild washdown while saving valuable machine space. A 1/4" port and M14x1.5 male rod thread equip the 40 mm bore, which delivers 628.3 N of push force at 0.5 MPa.
The built-in -S piston magnet enables CMSG, DMSG or EMSG switches for position sensing. Fixed TPU bumper pads absorb end-of-stroke impact across the 30-800 mm/s speed range. For sizing, the 628.3 N push force at 0.5 MPa translates to a safe working load of roughly 377 N, lifting about 32 kg vertically with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ40X150-30S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X150-30S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 150 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 MFJ40X150-30S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×150 | 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 MFJ40X150-30S Is Used
Changeover Dial-In
Fine-tune the extend position up to 30 mm during product family changeovers, using the 879.6 N push force at 0.7 MPa to seat heavy tooling without adding external stops.
Prototype Fit Rig
Safely test end positions on trial assemblies where the exact stroke is unknown, relying on the SUS304 barrel for mild corrosion resistance in experimental environments.
Variable Positioning Stop
Adjust the extend endpoint on the fly for flexible machining stops, taking advantage of the compact JIS body that saves mounting length over ISO 6432 equivalents.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X150-30S the Right Cylinder?
When deciding between the two available bores, the 40 mm option provides 628.3 N push at 0.5 MPa, whereas the MFJ32 delivers 402.2 N. Choose this 40 mm bore when moving heavier fixtures, and use the external adjuster to dial in the exact 120-150 mm extend position without buying a new cylinder. The adjuster fine-tunes the end point; it does not lock the rod mid-stroke. If the load must be held on air loss, add an external rod lock or pilot check valve, as the piston will drift. Mount via LB foot, FA flange or TC trunnion (no SDB), and leverage the -S magnet for electronic or reed sensors.
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 MFJ40X150-30S FAQ
This 40 mm bore cylinder uses a 1/4" port. 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.
An external adjuster shortens the extend stroke by up to 30 mm on site, allowing a usable extend range of 120-150 mm; retract remains full. The -S suffix means a piston magnet is built in for CMSG, DMSG or EMSG sensors. Fixed TPU bumpers decelerate the stroke end, but this is not a mid-stroke lock.
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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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