Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30 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 MFJ40X175-30
Trim the extend end by up to 30 mm directly on the machine with the AirTAC MFJ40X175-30, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. This double-acting actuator delivers a robust 628.3 N push force at 0.5 MPa, making it a strong choice for mid-weight tooling. Because the body is shorter than a comparable ISO 6432 unit for the same 40 mm bore and 175 mm stroke, it saves valuable mounting length without conforming to that standard. The fixed TPU bumper pads decelerate the piston at the stroke ends.
The external adjuster allows you to fine-tune the usable extend stroke down from 175 mm to 145 mm on site, which is ideal for trial fits and line changeovers where the exact end position is not yet final. Based on the 0.5 MPa push force, you get a safe working load of roughly 377 N, or enough to lift about 32 kg vertically with a 2:1 safety margin. This SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG switches. Air connects via the 1/4" port, and the male rod thread is M14x1.5.
Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30 |
|---|---|
| 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 MFJ40X175-30
| 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 MFJ40X175-30 Is Used
Changeover Stations
Dial in the 145 to 175 mm extend position during product changeovers to set precise ejection distances without machining new hard stops.
Trial Fit Rigs
Leverage the 628.3 N push force to press components while adjusting the stroke end on the fly to find the optimal assembly depth.
Variable Position Stops
Use the 30 mm adjuster to alter the end-of-stroke stopping point for different part heights, avoiding the need for multiple dedicated cylinders.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30 the Right Cylinder?
When sizing this actuator, compare the real thrust figures: the MFJ40 bore provides 628.3 N push and 527.8 N pull at 0.5 MPa, whereas stepping down to the MFJ32 yields 402.2 N push and 345.6 N pull. Choose the 40 mm bore if your tooling exceeds the smaller capacity, and use the 30 mm adjustment window to dial in the exact 145 to 175 mm extend position without buying a new cylinder. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover code exists for this build). Remember that the bumper pads only decelerate the stroke end; a plain cylinder drifts on air loss, so add an external rod lock or pilot check valve if you need to hold a load vertically. If you require position sensing, select the -S magnet variant instead.
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 MFJ40X175-30 FAQ
This 40 mm bore cylinder uses a 1/4" air 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. Operating pressure is 0.15 to 1.0 MPa and speed ranges from 30 to 800 mm/s.
The external adjuster shortens the extend stroke by up to 30 mm on site, giving a usable extend range of 145 to 175 mm, while the retract stroke remains full. The fixed TPU bumper pads only decelerate the piston near the end of travel; they do not lock or hold the load. If air pressure drops, the piston will drift, so you need an external rod lock or pilot check valve for position holding. This SKU has no magnet and cannot take a sensor.
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 MFJ40X175-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.