Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X175-50
The AirTAC Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X175-50 is a genuine double-acting aluminum-barrel mini cylinder with a Ø63mm bore, a 175mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 125–175mm. Fixed rubber bumper.
- BoreØ63 mm
- Stroke175 mm
- Adjustable125–175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionFixed rubber bumper
About the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X175-50
The AirTAC MBLJ63X175-50 is a double-acting aluminum mini cylinder featuring a rear travel stopper that trims the stroke end position. By turning the rear screw, you achieve a usable extension window of 125 to 175 mm without bolting on external stops or swapping the body. Driven by a Ø16 mm hard-chrome plated carbon steel rod, it generates 1558 N of push force and 1457 N of pull force at 0.5 MPa, making it well suited to heavy pressing or robust component seating tasks.
This SKU uses a fixed rubber bumper to soften end-of-travel impact, meaning the stroke is adjustable but the cushioning itself is not (upgrade to the MBLCJ variant for adjustable air cushioning). Because this specific model lacks the -S magnet suffix, it cannot accept an AirTAC CMSG, DMSG, or EMSG position sensor. The riveted rolling-packed barrel retains a heterogeneous two-way grease seal, and the overall length extends by the 50 mm adjustment range, requiring clear rear-space allocation during machine layout.
Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X175-50 Technical Specifications
| Model | Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X175-50 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø63 mm |
| Nominal stroke | 175 mm |
| Adjustable window | 125–175 mm (trim 50 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 MBLJ63X175-50
| MBLJ | MBLJ aluminum-barrel adjustable-stroke mini cylinder. |
|---|---|
| 63 | Bore size in mm. |
| ×175 | 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 MBLJ63X175-50 Is Used
Printed Circuit Board Press
Drives a heated platen to laminate multilayer PCBs, using the 125-175 mm stroke adjustment to dial in exact material thicknesses without changing tooling.
Automotive Bearing Seating
Applies up to 1558 N of push force at 0.5 MPa to press bearings into aluminum housings, with the rear stopper allowing precise depth control for different housing runs.
Packaging Carton Flap Folding
Extends 175 mm to fold heavy corrugated carton flaps prior to taping, relying on the fixed rubber bumper to absorb the high-speed end impact.
Is the Airtac MBLJ Adjustable Aluminum Alloy Mini Cylinder MBLJ63X175-50 the Right Cylinder?
Selecting this 63 mm bore provides massive thrust for a compact body, pushing 1558 N at 0.5 MPa. If your application needs less force and a tighter footprint, stepping down to the 50 mm bore drops the push force to 981 N. If you require even greater power, 63 mm is the largest available MBLJ size, so exceeding its 318 kgf maximum at 1.0 MPa would require migrating to a different cylinder family entirely. When replacing this unit, match the 63 mm bore, 175 mm stroke, 50 mm adjust code, G1/4 port, PT thread, and Basic mounting.
The rear screw functions purely as a mechanical travel stop to set the 125-175 mm window; it does not lock the load or hold position without continuous air pressure. Mounting is limited to Basic, FA flange, or LB foot styles, as MBLJ models do not support SDB pivots or back-cover attachments. Because the 175 mm stroke is relatively long for a 16 mm rod, external guiding is strongly recommended to prevent rod bending under heavy lateral loads.
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 MBLJ63X175-50 FAQ
At 0.5 MPa, this 63 mm bore cylinder outputs 1558 N of push force and 1457 N of pull force. At 0.7 MPa, the push force increases to 2181 N. The maximum theoretical force is 318 kgf when operated at the 1.0 MPa pressure limit.
The rear stopper allows you to trim the stroke back by up to 50 mm, creating a usable extension window of 125 to 175 mm. This adjuster is strictly a travel stop that sets the end position; it is not a lock. The cylinder cannot hold a load in place without live air pressure.
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