Airtac MFJ Adjustable Mini Cylinder MFJ40X100-50
The AirTAC Airtac MFJ Adjustable Mini Cylinder MFJ40X100-50 is a genuine double acting, adjustable stroke JIS-standard round-body mini air cylinder with a Ø40mm bore and 100mm 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
- Stroke100 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 MFJ40X100-50
Trimming the extend end by up to 50 mm on site, the AirTAC MFJ40X100-50 lets you set a usable 50 to 100 mm forward stroke without buying a new cylinder or adding external stops. This JIS-standard round-body mini cylinder features a SUS304 stainless barrel and riveted aluminium covers, giving you a shorter mounting envelope than an ISO 6432 unit for the same 40 mm bore and 100 mm stroke.
The 40 mm bore delivers 628.3 N of push force at 0.5 MPa, yielding a safe working load of about 377 N or a 32 kg vertical lift with a 2:1 margin. Air connects via a 1/4" port, and the 16 mm rod uses an M14x1.5 male thread. Note this SKU lacks the -S magnet, so it cannot accept CMSG, DMSG or EMSG sensors.
Airtac MFJ Adjustable Mini Cylinder MFJ40X100-50 Technical Specifications
| Model | Airtac MFJ Adjustable Mini Cylinder MFJ40X100-50 |
|---|---|
| Series | MFJ JIS mini cylinder |
| Bore size | Ø40 mm |
| Stroke | 100 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 MFJ40X100-50
| MFJ | JIS-standard round-body mini cylinder (adjustable-stroke). |
|---|---|
| 40 | Bore size in mm. |
| ×100 | 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 MFJ40X100-50 Is Used
Changeover Stations
Fine-tune the 50 mm extend window during product line changeovers to set new end positions rapidly without swapping out the entire cylinder.
Trial Fit Rigs
Dial in the exact forward stroke on prototype assembly rigs where the final stopping position is unknown, using the 628.3 N push force to test fits.
Variable-Position Stops
Adjust the extend end on the fly for variable-position stops, taking advantage of the shorter JIS body length to save space in tight machinery.
Is the Airtac MFJ Adjustable Mini Cylinder MFJ40X100-50 the Right Cylinder?
When sizing these adjustable cylinders, compare the real thrust: the MFJ40 pushes 628.3 N at 0.5 MPa versus 402.2 N for the MFJ32. Choose the 40 mm bore if your trial fits or changeover stations need that extra force. The external adjuster is ideal for variable-position stops where the exact end point is unknown during commissioning.
Mounting options include LB foot, FA flange and TC trunnion (no SDB or back-cover). Remember that the fixed TPU bumper pads only decelerate the stroke end; they do not lock the piston. If you need to hold a load on air loss, fit an external rod lock or pilot check valve. Operating speed runs 30-800 mm/s.
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 MFJ40X100-50 FAQ
This 40 mm bore cylinder uses a 1/4" port and an M14x1.5 male rod thread. It pushes 628.3 N and pulls 527.8 N at 0.5 MPa. At 0.7 MPa it pushes 879.6 N and pulls 738.9 N. The theoretical maximum force is 128.1 kgf at 1.0 MPa.
The external adjuster shortens the extend stroke by up to 50 mm on site, giving a usable 50 to 100 mm forward travel, while retract remains full. It uses fixed TPU bumper pads to decelerate the stroke end, not an adjustable air cushion. Also, this SKU lacks the -S magnet, so it cannot accept magnetic 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.
Request a Quote for Airtac MFJ Adjustable Mini Cylinder MFJ40X100-50
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.