Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X350-40S
The AirTAC Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X350-40S is a genuine double-acting aluminum-barrel mini cylinder with a Ø50mm bore, a 350mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 310–350mm. Fixed rubber bumper.
- BoreØ50 mm
- Stroke350 mm
- Adjustable310–350 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 MBLJ50X350-40S
The AirTAC MBLJ50X350-40S is a compact double-acting aluminum mini cylinder featuring a rear travel stopper that allows you to trim the stroke end position. This creates a usable adjustment window of 310-350 mm, letting you fine-tune the extend distance without adding external physical stops. Driven by a Ø16 mm hard-chrome plated rod, it delivers 981 N of push force and 881 N of pull force at 0.5 MPa.
This SKU includes a built-in magnet (-S) for rod position detection via CMSG reed or DMSG/EMSG electronic switches. It uses a fixed rubber bumper to soften end impacts and a grease-retaining piston seal within its riveted aluminum barrel. Because the overall length is calculated as A + 2 x stroke + adjust, this 350 mm travel unit is physically longer than a standard fixed-stroke variant.
Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X350-40S Technical Specifications
| Model | Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X350-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø50 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 310–350 mm (trim 40 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 MBLJ50X350-40S
| MBLJ | MBLJ aluminum-barrel adjustable-stroke mini cylinder. |
|---|---|
| 50 | Bore size in mm. |
| ×350 | Nominal stroke length in mm. |
| -40 | 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 MBLJ50X350-40S Is Used
Packaging Conveyor Diverter
Uses the 310-350 mm adjustable window to precisely set the pusher extension distance for varying carton widths on a packaging line without machining new stop blocks.
Textile Loom Tensioner
Leverages the 981 N push force at 0.5 MPa to shift a yarn guide carriage, fine-tuning the end-of-travel position to maintain exact material tension.
PCB Shuttle Positioning
Employs the -S magnet with a DMSG electronic sensor to confirm rod extension, adjusting the 350 mm stroke by up to 40 mm to accommodate different board sizes.
Is the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ50X350-40S the Right Cylinder?
If you need less thrust, stepping down to a 40 mm bore drops the 0.5 MPa push force to 628 N; stepping up to a 63 mm bore raises it significantly to 1558 N. Choose this MBLJ adjustable version over a fixed MBL when your machine requires product changeover flexibility, or select the MBLCJ variant if your inertia requires adjustable air cushions rather than a fixed rubber bumper. To match this exact SKU for replacement, verify the 50 mm bore, 350 mm stroke, 40 mm adjust code, G1/4 port, PT thread, and the -S magnet.
The rear stopper on this cylinder sets the travel limit but does not function as a lock, meaning the rod will drift if air pressure is lost. Mounting is restricted to Basic, FA flange, or LB foot styles, as no back-cover or SDB pivot options exist for the MBLJ series. With a 350 mm stroke, the small 16 mm rod is highly susceptible to side-loading; always use an external guide rail to prevent rod bending and premature seal wear.
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 MBLJ50X350-40S FAQ
At 0.5 MPa, it provides 981 N push and 881 N pull. At 0.7 MPa, the push force is 1374 N. The maximum theoretical force is 200 kgf at the 1.0 MPa operating pressure limit.
The rear screw stopper lets you trim the travel back by up to 40 mm, creating a usable stroke window from 310 mm to 350 mm. This stopper sets the end position and is not a lock; the cylinder cannot hold a load without live air pressure.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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