Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X50-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X50-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 50mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 30–50mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke50 mm
- Adjustable30–50 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- 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 MBLCJ40X50-20
The AirTAC MBLCJ40X50-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it highly effective for moderate-duty positioning. The rear stopper allows you to trim up to 20 mm of travel, creating a usable end-position window between 30 mm and 50 mm to dial in exact motions.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke cushioning to decelerate heavier loads smoothly and protect the end covers. The riveted rolling-packed barrel and grease-retaining piston seal ensure long service life, while the Ø16 carbon-steel rod features 20 µm hard-chrome plating for wear resistance. Note that this specific SKU lacks a built-in magnet, so it cannot host a CMSG, DMSG, or EMSG position sensor.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X50-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X50-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 30–50 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 | 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 MBLCJ40X50-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×50 | Nominal stroke length in mm. |
| -20 | 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 MBLCJ40X50-20 Is Used
PCB Router Z-Axis
Drives a spindle carriage on a printed circuit board routing machine, using the 30-50 mm window to set exact cutting depth while the air cushion softens the rapid 628 N descent.
Textile Calender Guide
Positions a fabric spreader bar inside a textile calendering line, where the adjustable stroke dials in the exact tensioning travel against continuous high-speed web movement.
Bottle Capper Press
Applies 528 N of pull force to secure aluminum caps on a beverage filling line, relying on the tunable cushion to prevent harsh snapping when releasing the cap torque head.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X50-20 the Right Cylinder?
If your application requires less force, stepping down to the 32 mm bore yields 402 N of push at 0.5 MPa, whereas stepping up to the 50 mm bore provides 981 N for heavier payloads. Choose this MBLCJ over the MBLJ when your moving mass demands adjustable deceleration rather than a fixed bumper impact, or over the MBLC if you need to fine-tune the end position. Remember the rear adjuster is strictly a travel stop, and the air cushion only decelerates; neither will mechanically hold a load in place without live air pressure.
Mounting is limited to Basic, FA flange, or LB foot styles, as this series omits SDB pivot and back-cover options. The overall length scales to A + 2 x stroke + adjust. For a direct replacement, match the 40 mm bore, 50 mm stroke, 20 mm adjust code, G1/4 PT threaded port, and M12x1.25 rod-end thread. Because this SKU lacks the -S suffix, no position sensing is possible without upgrading to a magnet-equipped model.
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 MBLCJ40X50-20 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa, with an operating pressure range of 0.15 to 1.0 MPa.
The rear adjustable stroke acts as a mechanical travel stop, allowing you to trim the 50 mm stroke down to a 30 mm minimum window. The adjustable air cushion is a screw-tunable valve that controls exhaust flow to decelerate the piston near the end covers. Neither feature locks or holds the load mechanically; live air pressure is required 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.
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