Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40S is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 175mm 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
- Stroke175 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 MFJ40X175-40S
Trimming the extend end by up to 40 mm on site, this double-acting JIS-standard round-body mini cylinder lets you set a usable forward stroke of 135 to 175 mm without buying a new unit. The riveted SUS304 stainless barrel and aluminium covers yield a body that is physically shorter than an ISO 6432 cylinder for the same 40 mm bore and 175 mm stroke, saving valuable mounting length while resisting mild washdown. A 1/4" port and M14x1.5 male rod thread feed the 16 mm piston rod.
In the 40 mm bore class, the piston generates 628.3 N of push force and 527.8 N of pull at 0.5 MPa. That translates to a safe working load of roughly 377 N, or the ability to lift about 32 kg vertically with a 2:1 safety margin. Because the -S suffix includes a built-in magnet, you can mount CMSG, DMSG or EMSG switches for position sensing.
Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40S |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 175 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 MFJ40X175-40S
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 MFJ40X175-40S Is Used
Changeover Stations
Dial in the exact 135 to 175 mm extend position during product format changes, using the 40 mm bore's 628.3 N push to shift heavy tooling plates without swapping cylinders.
Prototype Test Rigs
Safely apply up to 377 N of working force to new assemblies, relying on the external adjuster to iterate extend endpoints quickly during commissioning.
Variable Position Stops
Actuate clamps across mixed part heights, shortening the extend stroke on site by up to 40 mm to prevent over-travel while maintaining full retract.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40S the Right Cylinder?
When sizing these adjustable-stroke units, compare both bores directly: this MFJ40 delivers 628.3 N push at 0.5 MPa, whereas the smaller MFJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier fixtures or overcoming high friction. The external adjuster is ideal for trial fits and line changeovers where the exact end position is not final, as you can fine-tune the extend stroke on the fly without adding external stops.
Mount using LB foot, FA flange, or TC trunnion brackets (SDB and back-cover options are not available on this build). Remember that the fixed TPU bumper pads only decelerate the stroke end; they do not lock the rod. If gravity or air loss could cause the piston to drift, install an external rod lock or pilot check valve to hold the load.
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 MFJ40X175-40S FAQ
This 40 mm bore cylinder uses a 1/4" port and a 16 mm rod with an M14x1.5 male thread. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical max of 128.1 kgf at 1.0 MPa. Operating speed ranges from 30 to 800 mm/s.
The external adjuster shortens the extend stroke by up to 40 mm on site, giving a usable forward range of 135 to 175 mm; the retract stroke remains full. Fixed TPU bumper pads decelerate the end of travel but do not function as a brake. The -S magnet enables CMSG, DMSG, or EMSG sensors for position feedback.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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