Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40 is a genuine double-acting aluminum-barrel mini cylinder with a Ø50mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 85–125mm. Adjustable air cushion (both ends).
- BoreØ50 mm
- Stroke125 mm
- Adjustable85–125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionAdjustable air cushion (both ends)
- 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 MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40
The AirTAC MBLCJ50X125-40 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and twin screw-tunable air cushions. A 50mm bore yields 981N push and 881N pull at 0.5MPa. The rear stopper trims up to 40mm of travel, creating a usable 85-125mm end-position window for precise machinery spacing. The adjustable air cushion decelerates heavy 125mm moves to protect the end covers, unlike the fixed rubber bumper on an MBLJ.
This riveted rolling-packed barrel uses a heterogeneous two-way grease-retaining piston seal and a Ø16 carbon-steel rod with 20μm hard-chrome plating. It operates at 30-800mm/s on filtered 40μm air. The overall length equals A + 2x125 + 40. This specific SKU lacks a built-in magnet, so it cannot accept CMSG, DMSG or EMSG position sensors. Mounting is limited to Basic, FA or LB; no SDB pivot or back-cover exists.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø50 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 85–125 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 | Adjustable air cushion (both ends) |
| 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 MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40 Is Used
Thermoforming Molds
Positions 50mm bore plastic sheet forming molds with 981N force, using the 85-125mm window to dial exact clamp heights and air cushions to halt heavy platens smoothly.
Pallet Diverters
Pushes heavy pallets off a transfer line; the 881N pull retracts the diverter arm while the twin cushions absorb kinetic energy at 125mm stroke ends.
Dough Sheeters
Actuates flour-dosing gates in bakery lines, relying on the 40mm rear stroke trim to fine-tune the metering gap without moving cylinder mounts.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40 the Right Cylinder?
If 981N is excessive, step down to the 40mm bore (628N push @0.5MPa). If your payload needs more thrust, step up to the 63mm bore (1558N push @0.5MPa). Choose the MBLCJ over the fixed-stroke MBLC when you need rear travel trimming; choose it over the MBLJ when you need tunable end-deceleration instead of a fixed bumper. The rear adjuster sets a travel stop and the cushion decelerates; neither holds a load statically, so use an external lock for position holding. For exact replacement, match bore 50, stroke 125, adjust 40, G1/4 port, PT thread, Basic/FA/LB mounting, and no 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 MBLCJ Adjustable Mini Cylinder MBLCJ50X125-40 FAQ
At 0.5MPa it yields 981N push and 881N pull; at 0.7MPa it yields 1374N push. The maximum theoretical force is 200kgf at 1.0MPa.
The rear adjuster trims 40mm of travel, setting a usable 85-125mm end-position window. The twin air cushions screw-tune end-of-stroke deceleration. The adjuster is a travel stop and the cushion only decelerates; neither locks the load.
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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