Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X125-75S
The AirTAC Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X125-75S is a genuine double-acting aluminum-barrel mini cylinder with a Ø63mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 75mm for a usable window of 50–125mm. Fixed rubber bumper.
- BoreØ63 mm
- Stroke125 mm
- Adjustable50–125 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 MBLJ63X125-75S
The AirTAC MBLJ63X125-75S is a double-acting, single-rod aluminum mini cylinder engineered for high-force applications where end-position fine-tuning is critical. A rear screw stopper lets you trim the stroke by up to 75 mm, creating a usable travel window between 50 mm and 125 mm. This allows on-the-fly product changeovers without physically swapping the cylinder or adding external stops. At 0.5 MPa, it generates 1558 N of push force and 1457 N of pull force, peaking at a theoretical 318 kgf at 1.0 MPa.
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 keeps the body compact, while the carbon-steel rod features 20 µm hard-chrome plating to resist wear. The internal fixed rubber bumper softens end impacts, but it is strictly a travel stop, not a lock; the rod will drift if air pressure is removed. Overall length equals A + (2 x stroke) + adjust, and mounting is limited to Basic, FA, or LB styles.
Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X125-75S Technical Specifications
| Model | Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X125-75S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø63 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 50–125 mm (trim 75 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1458 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 MBLJ63X125-75S
| MBLJ | MBLJ aluminum-barrel adjustable-stroke mini cylinder. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -75 | 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 MBLJ63X125-75S Is Used
Injection Mold Ejection
Provides 1558 N of push force at 0.5 MPa to eject plastic parts, using the 50-125 mm adjustable window to accommodate varying mold depths without changing tooling.
Automotive Panel Pressing
Applies up to 318 kgf of clamping pressure to hold sheet metal during stamping, relying on the rear stopper to fine-tune the press depth for different panel geometries.
PCB Conveyor Routing
Uses the integrated -S magnet with DMSG electronic sensors to confirm rod extension at circuit board routing stations, adjusting stroke to handle varying board widths.
Is the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X125-75S the Right Cylinder?
Selecting this 63 mm bore model makes sense when your process requires substantial thrust within a compact footprint. If you need less force, stepping down to the 50 mm bore yields 981 N push at 0.5 MPa. Because 63 mm is the largest standard MBLJ size, there is no larger step-up option in this series. Compared to the fixed-stroke MBL or the adjustable-cushion MBLCJ, this MBLJ variant focuses solely on tailoring the travel distance. Remember that the rear adjuster only sets the end position; it does not hold the load without live air. When replacing this unit, match the 63 mm bore, 125 mm stroke, 75 mm adjust code, G1/4 port, 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 MBLJ63X125-75S FAQ
At 0.5 MPa, this 63 mm bore cylinder provides 1558 N of push force and 1457 N of pull force. At 0.7 MPa, push force reaches 2181 N. The theoretical maximum force is 318 kgf at 1.0 MPa.
The rear screw stopper allows you to trim the nominal 125 mm stroke back by up to 75 mm, giving a usable travel window of 50 to 125 mm. The adjuster acts only as a travel stop and does not lock or hold the load without continuous air pressure.
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.
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