Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 200–250mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke250 mm
- Adjustable200–250 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S
The AirTAC MBLCJ40X250-50S is a compact double-acting mini cylinder featuring a rear adjustable stroke stopper and tunable air cushions at both ends. A 40mm bore yields 628N push and 528N pull force at 0.5MPa, making it well-suited for moving heavier jigs over its 250mm length. The rear adjuster trims up to 50mm of travel, providing a usable 200-250mm end-position window for exact tool alignment.
Unlike the base MBLJ with its fixed rubber bumper, this model uses screw-tunable deceleration to smooth out high-speed impacts and protect the end covers. The riveted aluminum barrel and 20um hard-chrome plated carbon-steel rod provide durability in tight spaces. Equipped with a built-in magnet (-S), it supports CMSG reed or DMSG/EMSG electronic sensors for position detection. It uses a G1/4 port and M12x1.25 rod thread.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 200–250 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 500 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -50 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S Is Used
CNC Lathe Bar Feeder
Pushes raw bar stock through a guide tube with 628N force; the 200-250mm stroke window allows fine-tuning the exact feed length without moving the cylinder mount.
Injection Mold Ejection
Tunable air cushions absorb the 250mm high-speed return impact of heavy mold plates, preventing end-cover damage on fast cycle times.
Packaging Carton Sealer
Drives a folding arm over a 250mm travel path to seal carton flaps, using the DMSG electronic sensor to confirm the arm is fully retracted before conveyor advance.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S the Right Cylinder?
Stepping down to the 32mm bore drops the output to 402N push at 0.5MPa, while moving up to the 50mm bore increases it to 981N. Choose this 40mm size when your payload requires around 64kgf of push force. The MBLCJ is preferred over the MBLJ when you need to tune end-of-stroke deceleration, and over the MBLC when you need that rear travel-trimming stopper. Remember the adjuster is a mechanical travel stop, not a lock; it cannot hold a load in place without live air pressure. Mounting is limited to Basic, FA flange, or LB foot options (no SDB pivot or back-cover). For an exact replacement, match the 40mm bore, 250mm stroke, 50mm adjust code, G1/4 port, PT thread, and -S magnet.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-50S FAQ
At 0.5MPa it provides 628N push and 528N pull force. At 0.7MPa the push increases to 880N. The maximum theoretical force is 128kgf at 1.0MPa.
The rear adjustable stroke is a mechanical travel stopper that trims your effective stroke window to 200-250mm; it does not lock or hold the load. The adjustable air cushion is a screw-tunable valve that controls end-of-stroke deceleration to protect the cylinder covers from high-speed impacts.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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