Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30S
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30S 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 MFJ40X175-30S
Tune your extend end position on-site with the AirTAC MFJ40X175-30S, a JIS-standard round-body mini cylinder built with a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the extend stroke by up to 30 mm, giving a usable window of 145 to 175 mm without buying a new unit or adding external stops. The 40 mm bore delivers 628.3 N of push force at 0.5 MPa, making it a robust choice for moderate loads.
This double-acting actuator is shorter than an ISO 6432 cylinder for the same bore and stroke, saving valuable mounting length. The -S suffix means a piston magnet is installed for CMSG, DMSG, or EMSG switches. With a 1/4" port and fixed TPU bumper pads, it handles speeds of 30-800 mm/s. Based on the 0.5 MPa push force, expect a safe working load around 377 N, or vertical lifts of about 32 kg with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30S Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30S |
|---|---|
| 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 MFJ40X175-30S
| 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 MFJ40X175-30S Is Used
Changeover Stations
Dial in the 145 to 175 mm extend position during product format changes, using the 30 mm adjuster to set stops without swapping hardware.
Trial Fit Rigs
Perfect for prototype testing where the exact end point is unknown, letting you fine-tune the stroke while applying 628.3 N of push force.
Variable Position Stops
Adjust the extend end on the fly for multi-part machining, using the built-in magnet to confirm the modified position with a sensor.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X175-30S the Right Cylinder?
Choose the MFJ40 over the MFJ32 when you need extra muscle: the 40 mm bore pushes 628.3 N at 0.5 MPa compared to 402.2 N for the 32 mm bore. This 175 mm base stroke model is ideal for trial fits and line changeovers where the exact extend position is not final, letting you dial in the last 30 mm on the fly. Mounting options include LB foot, FA flange, and TC trunnion (no SDB or back-cover code exists for this build).
Remember that the external adjuster only sets the extend end position; it does not function as a mid-stroke lock. A plain cylinder drifts if air pressure drops, so for a held load you must add an external rod lock or pilot-operated check valve. The included -S magnet supports CMSG, DMSG, or EMSG sensors for position feedback.
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 MFJ40X175-30S FAQ
This 40 mm bore cylinder has 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 30 mm on-site; retract remains full. It uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable air cushion. The -S magnet enables CMSG, DMSG, or EMSG switches for position sensing.
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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.
Fast Reply
Most inquiries answered within 7-8 hours.
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