Airtac MFJ Adjustable Mini Cylinder MFJ40X175-20
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X175-20 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 MFJ40X175-20
Tune your extend end position on site with the AirTAC MFJ40X175-20, a JIS-standard round-body mini cylinder built from a SUS304 stainless barrel and riveted aluminium covers. An external adjuster lets you shorten the extend stroke by up to 20 mm, giving a usable 155 to 175 mm window without buying a new unit or adding external stops. The 1/4 inch port and 16 mm rod deliver a robust 628.3 N push force at 0.5 MPa.
This 40 mm bore design is shorter than a comparable ISO 6432 cylinder, saving valuable mounting length while the stainless body resists mild washdown. It relies on fixed TPU bumper pads to decelerate the stroke end. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors. For a safe working load, expect around 377 N, lifting about 32 kg vertically with a 2:1 margin.
Airtac MFJ Adjustable Mini Cylinder MFJ40X175-20 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X175-20 |
|---|---|
| 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 MFJ40X175-20
| 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 MFJ40X175-20 Is Used
Changeover Stations
Dial in the 155 to 175 mm extend position during product format changes, using the 628.3 N force to push heavy tooling blocks into exact alignment.
Prototype Set-up Rigs
Use the 20 mm on-site adjuster to test multiple extend endpoints on a new assembly fixture before machining final hard stops.
Variable-Position Stops
Provide adjustable mechanical end limits for a 40 mm bore actuator pushing parts into a staging area, fine-tuning the travel without swapping cylinders.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X175-20 the Right Cylinder?
When sizing between the two bores, the MFJ40 provides 628.3 N of push force at 0.5 MPa compared to 402.2 N on the MFJ32, making this 40 mm bore the better choice for heavier moving masses. The 20 mm adjustable window is highly useful for trial fits and line changeovers where the exact end position is not yet final. Mounting options include LB foot, FA flange, and TC trunnion, with no SDB or back-cover available.
Keep in mind the adjuster only sets the extend end point; it is not a mid-stroke lock. Because a standard cylinder does not hold position on air loss, the piston will drift, so add an external rod lock or pilot check valve if you need to suspend a load safely.
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 MFJ40X175-20 FAQ
This 40 mm bore cylinder has a 1/4 inch port and a 16 mm rod. It generates 628.3 N push and 527.8 N pull at 0.5 MPa, or 879.6 N push and 738.9 N pull at 0.7 MPa. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 20 mm on site, but it only sets the end position; it is not a lock. Fixed TPU bumpers decelerate the stroke end. Also, this SKU lacks the -S magnet, so it cannot take 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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