Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ25X50-50S
The AirTAC Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ25X50-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 50mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 0–50mm. Fixed rubber bumper.
- BoreØ25 mm
- Stroke50 mm
- Adjustable0–50 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- 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 MBLJ25X50-50S
The AirTAC MBLJ25X50-50S is a double-acting, single-rod aluminum mini cylinder featuring a rear adjustable stroke. By turning the rear stopper screw, you can trim the extend end position by up to 50 mm, providing a usable working window of 0 to 50 mm for this 50 mm stroke model. It delivers 245 N push and 206 N pull force at 0.5 MPa, making it well-suited for medium-duty positioning and actuation tasks.
This SKU includes a built-in magnet (-S) for compatibility with AirTAC CMSG reed and DMSG/EMSG electronic sensor switches to track rod position. The riveted rolling-packed aluminum barrel uses a heterogeneous two-way grease-retaining piston seal, while the Ø10 mm carbon-steel rod features 20 µm hard-chrome plating for wear resistance. End-of-travel impact is absorbed by a fixed rubber bumper. The rear adjuster acts only as a travel stop to set your end position; it does not hold the load without live air pressure.
Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ25X50-50S Technical Specifications
| Model | Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ25X50-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 0–50 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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 | Fixed rubber bumper |
| Max standard stroke | Up to 300 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 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 MBLJ25X50-50S
| MBLJ | MBLJ aluminum-barrel adjustable-stroke mini cylinder. |
|---|---|
| 25 | Bore size in mm. |
| ×50 | 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: MBLCJ (adjustable stroke, adjustable cushion), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ25X50-50S Is Used
Packaging Print Head Alignment
Dial in the 0-50 mm extend position on the fly to match varying carton widths, using the 245 N push force at 0.5 MPa to positively seat folding flaps without crushing the board.
Textile Tensioning Guide
Fine-tune the yarn guide rod end-point during material changeovers, leveraging the 206 N pull force to maintain consistent tension across different thread densities.
PCB Test Probe Nesting
Utilize the -S magnet with a DMSG solid-state sensor to verify the extend position of the test head, trimming the stroke up to 50 mm to accommodate different PCB stack heights.
Is the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ25X50-50S the Right Cylinder?
When sizing this cylinder, consider stepping down to the MBLJ20 variant if your application requires less force (157 N push at 0.5 MPa), or stepping up to the MBLJ32 if you need greater thrust (402 N push at 0.5 MPa). The MBLJ25X50-50S is ideal when you need on-the-fly end-position tuning during product changeovers without swapping the cylinder or adding external physical stops.
For replacements, verify this exact configuration: 25 mm bore, 50 mm stroke, 50 mm adjustable code, G1/8 port, PT thread, and the -S magnet. Mounting is limited to Basic, FA (flange), or LB (foot) brackets; this series does not support SDB pivot or back-cover mounts. Note that the overall length is longer than a fixed MBL cylinder (A + 2 x stroke + 50 mm adjust). If your system requires adjustable end cushioning rather than a fixed rubber bumper, select the MBLCJ variant instead. Because the rear stopper and bumper only set and soften the travel end, an external locking device is required to hold a load without continuous air pressure.
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 MBLJ25X50-50S FAQ
At 0.5 MPa, this 25 mm bore double-acting cylinder provides 245 N push and 206 N pull force. At 0.7 MPa, the push force increases to 343 N. The theoretical maximum force is 50 kgf at 1.0 MPa.
The rear stopper screw lets you trim the extend end position by up to 50 mm, creating a usable stroke window from 0 to 50 mm. This 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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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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