Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S
The AirTAC Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø50mm bore, a 50mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 30–50mm. Fixed rubber bumper.
- BoreØ50 mm
- Stroke50 mm
- Adjustable30–50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionFixed rubber bumper
- 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 MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S
The AirTAC MBLJ50X50-20S is a compact double-acting mini cylinder featuring a riveted aluminum barrel and a single Ø16mm carbon-steel rod with 20µm hard-chrome plating. A rear stopper screw lets you trim the stroke end position by up to 20mm, providing a usable travel window of 30-50mm. This allows precise end-position tuning during commissioning without swapping the cylinder or adding external stops. Generating 981N push and 881N pull force at 0.5MPa, it is built for robust actuation in tight spaces.
This model includes a built-in magnet (-S) for compatibility with AirTAC CMSG (reed), DMSG, and EMSG (electronic solid-state) sensor switches to detect rod position. It uses a fixed rubber bumper to soften end impact and a heterogeneous two-way grease-retaining piston seal for stable lubrication. The standard PT port is G1/4, and the rod-end thread is M14x1.5. Overall length equals A + 2 x stroke + adjust, making it slightly longer than a fixed MBL cylinder.
Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S Technical Specifications
| Model | Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 30–50 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| 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 rubber bumper |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 881 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S
| MBLJ | MBLJ aluminum-barrel adjustable-stroke mini cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Nominal stroke length in mm. |
| -20 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLCJ (adjustable stroke, adjustable cushion), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S Is Used
Packaging End-Stops
Fine-tune the 30-50mm stroke window to hit exact carton folding positions on a packaging line, absorbing 981N of force without bolting on external physical stops.
Dispenser Height Changeover
Adjust the rear screw by up to 20mm to rapidly set fill nozzle heights for different bottle sizes, using the -S magnet to trigger DMSG electronic sensors.
PCB Conveyor Gating
Actuate flow diverter gates in electronics assembly, relying on the 881N pull force to retract the Ø16mm rod smoothly against conveyor vibration.
Is the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S the Right Cylinder?
When sizing this 50mm bore, stepping down to a 40mm bore yields 628N push at 0.5MPa, while stepping up to a 63mm bore provides 1558N push. Choose this MBLJ variant over a fixed-stroke MBL when you need on-the-fly end-position adjustment for product changeovers. If your application suffers from high kinetic energy at the end of stroke, consider the MBLCJ variant, which adds an adjustable air cushion instead of the MBLJ's fixed rubber bumper. Remember that the rear adjuster is a travel stop, not a lock; it sets the end position but does not hold the load without live air pressure. Mounting is limited to Basic, FA (flange), or LB (foot); there is no back-cover or SDB pivot option. To replace this exact unit, match the 50mm bore, 50mm stroke, 20mm adjust code, G1/4 PT thread, and the -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 MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X50-20S FAQ
At 0.5 MPa, the push force is 981N and the pull force is 881N. At 0.7 MPa, the push force is 1374N. The theoretical maximum force is 200 kgf at 1.0 MPa.
The rear stopper allows you to trim the stroke by up to 20mm, creating a usable travel window of 30-50mm. The adjuster is a travel stop that sets the end position; it does not lock or hold the load without live air pressure.
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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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