Airtac MFJ Adjustable Mini Cylinder MFJ40X175-50S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X175-50S 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 MFJ40X175-50S
Dial in your extend end-point on the fly with the AirTAC MFJ40X175-50S, a JIS-standard round-body mini cylinder built for 40 mm bores. The external adjuster lets you shorten the extend stroke by up to 50 mm on-site, giving a usable forward range of 125 to 175 mm without buying a new unit. Retract remains full length. A 1/4" port and M14x1.5 male rod thread feed the 16 mm piston rod.
This double-acting actuator delivers 628.3 N of push force at 0.5 MPa, translating to a safe working load of roughly 377 N or about 32 kg of vertical lift with a 2:1 margin. The riveted aluminium covers and SUS304 stainless barrel resist mild washdowns, and the body is shorter than a comparable ISO 6432 cylinder. Because this SKU includes the -S magnet, it is ready for CMSG, DMSG, or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X175-50S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X175-50S |
|---|---|
| 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 MFJ40X175-50S
| 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 MFJ40X175-50S Is Used
Changeover Stations
Fine-tune the 125 to 175 mm extend position during product changeovers without swapping hardware, leveraging the 628.3 N push force to shift heavy guide rails.
Prototype Fit-Ups
Dial in the exact forward stop during trial assemblies. The SUS304 barrel handles workshop environments while you find the optimal stroke.
Variable Position Stops
Adjust the end-point on the fly for flexible machining fixtures. The -S magnet allows CMSG sensors to confirm the adjusted extended position.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X175-50S the Right Cylinder?
When sizing these mini cylinders, compare the two available bores directly: this MFJ40 pushes with 628.3 N at 0.5 MPa, whereas the smaller MFJ32 delivers 402.2 N. Choose the 40 mm bore when moving heavier jigs or defeating higher friction. The 50 mm adjustable window is ideal for trial fits and line changeovers where the exact end position is not finalised.
Mounting options include LB foot, FA flange, and TC trunnion (no SDB). Fixed TPU bumper pads decelerate the stroke ends across the 30-800 mm/s speed range. Remember that the bumper is not a brake; the piston will drift on air loss, so fit an external rod lock or pilot check valve for held loads.
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 MFJ40X175-50S 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, 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.
The external adjuster shortens the extend stroke by up to 50 mm on-site; it does not add stroke beyond the 175 mm base and is not a mid-stroke lock. The -S suffix means a piston magnet is built-in, allowing you to mount CMSG, DMSG, or EMSG switches for position sensing.
Authorized Export Seller
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.
Request a Quote for Airtac MFJ Adjustable Mini Cylinder MFJ40X175-50S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.