Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40 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 MFJ40X175-40
Trimming the extend stroke by up to 40 mm on-site, the AirTAC MFJ40X175-40 lets you dial in the exact end position between 135 and 175 mm 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, making its overall body shorter than an ISO 6432 unit of the same bore and stroke to save mounting space while resisting mild corrosion and washdowns.
Driven by a 16 mm piston rod and a 1/4" port, this double-acting 40 mm bore generates 628.3 N of push force and 527.8 N of pull force at 0.5 MPa. For practical sizing, that translates to a safe working load of about 377 N, or lifting roughly 32 kg vertically with a 2:1 safety margin. It runs on filtered air at 30-800 mm/s with fixed TPU bumper pads decelerating the stroke ends, and because this specific SKU lacks the -S magnet, it cannot accept CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40 |
|---|---|
| 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 MFJ40X175-40
| 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 MFJ40X175-40 Is Used
Changeover Stations
Fine-tune the extend position up to 40 mm during product family changeovers, using the 628.3 N push force to shift heavy tooling plates without swapping cylinders.
Prototype Fit-Ups
Dial in the exact 135 to 175 mm extend length on trial assembly rigs, relying on the SUS304 barrel to withstand occasional coolant or washdown splashes.
Variable-Position Stops
Set precise end stops for clamping operations where the workpiece height varies, letting the fixed TPU bumpers absorb the impact at the end of travel.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X175-40 the Right Cylinder?
When sizing these adjustable cylinders, weigh the MFJ32 against the MFJ40. The 32 mm bore yields 402.2 N of push force at 0.5 MPa, whereas this MFJ40 delivers 628.3 N, making the larger bore the right pick when your trial-fit fixtures or changeover stations need to move heavier jigs. The 40 mm adjustable window is especially handy during line commissioning where the exact extend position is not yet finalized.
Mounting options include LB foot, FA flange, and TC trunnion (there is no SDB or back-cover option on this build). Remember that the external adjuster only shortens the extend stroke; it is not a mid-stroke lock. Because a standard cylinder drifts on air loss, install an external rod lock or pilot-operated check valve if the load must be held in place.
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 MFJ40X175-40 FAQ
This 40 mm bore double-acting 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, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 40 mm on-site, giving a usable extend range of 135-175 mm while retract remains full. This SKU has no magnet (-S), so it cannot take CMSG, DMSG, or EMSG switches; it uses fixed TPU bumper pads rather than 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.
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Most inquiries answered within 7-8 hours.
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