Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-40S is a genuine double-acting aluminum-barrel mini cylinder with a Ø50mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 0–40mm. Adjustable air cushion (both ends).
- BoreØ50 mm
- Stroke40 mm
- Adjustable0–40 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 MBLCJ50X40-40S
The AirTAC MBLCJ50X40-40S is a compact double-acting aluminum mini cylinder engineered for heavy-duty positioning in tight spaces. It features a rear stroke adjuster allowing you to trim up to 40 mm of travel, creating a usable window from 0 to 40 mm for precise end-position tuning. Equipped with an adjustable air cushion at both ends, it provides screw-tunable deceleration to protect the end covers during high-impact moves. Delivering 981 N of push force at 0.5 MPa, this 50 mm bore unit handles substantial loads within a short 40 mm stroke.
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 barrel and heterogeneous two-way grease-retaining piston seal maintain consistent lubrication, while the carbon-steel rod features 20 µm hard-chrome plating to resist corrosion and scoring. Unlike the base MBLJ which relies on a fixed rubber bumper, the MBLCJ series allows you to fine-tune the end-of-stroke deceleration to match your load's mass and velocity.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø50 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 0–40 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 MBLCJ50X40-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 50 | Bore size in mm. |
| ×40 | 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 MBLCJ50X40-40S Is Used
Injection Mold Ejection
Handles the 981 N push force required to eject dense plastic parts from tight mold cavities, using the 0-40 mm stroke adjustment to compensate for varying mold thicknesses without remounting.
Stainless Steel Trimming
Drives a heavy-duty cutting blade at high speed, relying on the adjustable air cushion to decelerate the 881 N pull load smoothly and prevent end-cover damage during rapid cycling.
PCB Conveyor Gating
Uses the built-in magnet with DMSG solid-state sensors to confirm gate closure on a high-speed SMT line, ensuring precise board routing under the 1374 N force available at 0.7 MPa.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ50X40-40S the Right Cylinder?
Select this 50 mm bore model when your application requires 981 N of push force at 0.5 MPa within a highly confined footprint. If you need less force, the 40 mm bore yields 628 N and offers a smaller body profile; if you require greater thrust, stepping up to the 63 mm bore provides 1558 N. The MBLCJ is preferred over the MBLJ when your moving mass demands tunable pneumatic cushioning rather than a fixed rubber bumper, and over the MBLC when you need the rear travel adjuster to dial in the exact end position.
Remember that the rear stopper sets the travel end and the cushion only decelerates; neither is a lock, so the rod will drift if air is removed. Mounting is limited to Basic, FA (flange), or LB (foot) as there is no back-cover or SDB pivot option. To match this exact replacement SKU, specify: 50 mm bore, 40 mm stroke, 40 mm adjust code, PT thread, G1/4 port, and the -S magnet. Given the short 40 mm stroke, side-load stress on the Ø16 rod is minimal, but external guides are always recommended for 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 MBLCJ Adjustable Mini Cylinder MBLCJ50X40-40S FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 981 N of push force and 881 N of pull force. At 0.7 MPa, the push force increases to 1374 N. The maximum theoretical force is 200 kgf (1961 N) at 1.0 MPa.
The adjustable stroke is a rear travel stopper that lets you trim the rod's end position within a 0 to 40 mm usable window. The adjustable air cushion is a screw-tunable valve that regulates air exhaust to decelerate the load near the stroke ends. Neither holds the load in place; the cylinder requires live air to maintain position.
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.
Related AirTAC Adjustable-Stroke Cylinders
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