Airtac MFCJ Adjustable Mini Cylinder MFCJ40X175-20S
The AirTAC Airtac MFCJ Adjustable Mini Cylinder MFCJ40X175-20S is a genuine double acting, adjustable stroke + cushion 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 + cushion
- Rod threadM14×1.5
- CushionVariable air cushion, both ends
- 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 MFCJ Adjustable Mini Cylinder MFCJ40X175-20S
Dial in exact end positions and absorb high-speed shock with the AirTAC MFCJ40X175-20S. This double-acting, JIS-standard round-body mini cylinder features an external adjuster that shortens the 175 mm extend stroke by up to 20 mm on-site, yielding a usable 155-175 mm window while retract remains full. A needle variable air cushion at both ends soaks up end-of-stroke impact, ensuring smooth deceleration rather than abrupt stops.
Built with a SUS304 stainless barrel and riveted aluminium covers, the body is physically shorter than a comparable ISO 6432 unit, saving valuable mounting length without claiming ISO compliance. The 40 mm bore uses a 1/4" port and a 16 mm rod with an M14x1.5 male thread. Generating 628.3 N push force at 0.5 MPa, it handles a safe working load of roughly 377 N or lifts about 32 kg vertically with a 2:1 margin. The -S suffix provides a built-in magnet for CMSG, DMSG, or EMSG sensors.
Airtac MFCJ Adjustable Mini Cylinder MFCJ40X175-20S Technical Specifications
| Model | Airtac MFCJ Adjustable Mini Cylinder MFCJ40X175-20S |
|---|---|
| Series | MFCJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 175 mm |
| Acting type | Double acting, adjustable stroke + cushion |
| 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 | Variable air cushion, both ends |
| 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 MFCJ Adjustable Mini Cylinder MFCJ40X175-20S
| MFCJ | JIS-standard round-body mini cylinder (adjustable-stroke, variable cushion). |
|---|---|
| 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 MFCJ Adjustable Mini Cylinder MFCJ40X175-20S Is Used
High-Speed Machining Clamps
Tune the 155-175 mm extend stroke precisely to fixture variations on a machining line, relying on the variable air cushion to prevent shock when clamping at high speed.
Package Diverters
Adjust the pusher stroke on-site for mixed carton sizes while the 628.3 N force handles heavier goods smoothly without end-cap slamming.
Vertical Lift Stops
Lifts about 32 kg vertically with a 2:1 safety margin; use the external adjuster to set the exact raise height and the needle cushion for gentle deceleration.
Is the Airtac MFCJ Adjustable Mini Cylinder MFCJ40X175-20S the Right Cylinder?
When sizing this series, compare the two available bores directly: this MFCJ40 delivers 628.3 N push at 0.5 MPa, whereas the smaller MFCJ32 provides 402.2 N. Choose the 40 mm bore when moving heavier fixtures or overcoming high friction at speed. The adjustable stroke and dual variable air cushions are ideal for trial fits and high-speed changeovers where both the exact end position and shock absorption need field tuning.
Remember that the air cushion only decelerates the piston near the stroke end; it does not function as a lock or brake. If your application must hold a load vertically during air loss, add an external rod lock or pilot-operated check valve. For mounting, select LB foot, FA flange, or TC trunnion brackets (SDB is not offered). The included -S magnet enables position sensing, whereas a SKU without S cannot accept a sensor.
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 MFCJ Adjustable Mini Cylinder MFCJ40X175-20S FAQ
This 40 mm bore cylinder features a 1/4" port and a 16 mm rod. 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 20 mm on-site. The variable air cushions at both ends only decelerate the piston near the ends; they do not lock or hold the load. The -S suffix means it has a built-in magnet for CMSG, DMSG, or EMSG sensors.
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.
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