Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 50mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 0–50mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke50 mm
- Adjustable0–50 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50S
The AirTAC MBLCJ20X50-50S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. Equipped with a built-in magnet for position sensing, it delivers 157 N of push force at 0.5 MPa. The rear stopper allows you to trim up to 50 mm of travel, creating a highly versatile 0-50 mm usable stroke window for exact endpoint positioning.
Unlike the fixed rubber bumper found on the base MBLJ, the screw-tunable air cushion on this unit decelerates the piston near the end caps, absorbing impact for faster cycling and protecting the end covers. The riveted rolling-packed barrel and 20 um hard-chrome plated carbon-steel rod ensure durability. Remember that the rear adjuster acts strictly as a travel stop, not a mechanical lock; it sets the endpoint but does not hold the load against external forces.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 0–50 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 300 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 MBLCJ20X50-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50S Is Used
PCB Depaneling Saw Feed
Uses the 0-50 mm adjustable stroke window to precisely set the cutting depth of a circular saw on a PCB depaneling router, while the air cushion ensures smooth deceleration of the 157 N push force.
Micro-Dispenser Valve Actuation
Triggers a shot-dispenser valve for conductive epoxy, relying on the exact rear stopper position to meter adhesive volume without mechanical harshness.
Lightweight Product Diverter
Actuates a small flipper gate on a conveyor for small electronics packaging, using the -S magnet with a DMSG electronic sensor to confirm gate arrival at high cycle rates.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50S the Right Cylinder?
Step down to the smaller 12 mm bore if your application requires less than 60 N of push force, or step up to the 25 mm bore (245 N push at 0.5 MPa) if you need to drive heavier mechanisms. Choose the MBLCJ over the MBLJ when your cycle speeds demand tunable end-of-stroke deceleration rather than a simple fixed bumper, or select the MBLC if you need fixed standard stroke lengths without the rear adjuster.
When ordering a replacement, verify the 20 mm bore, 50 mm stroke, 50 mm adjust code, G1/8 port, PT thread, and the -S magnet. Mounting is limited to Basic, FA flange, or LB foot styles; no back-cover or SDB pivot options exist. Because the overall length equals A + 2 x stroke + adjust, ensure your envelope accommodates the extended rear housing. The 8 mm rod handles axial loads well, but external guidance is required to prevent side-load bending.
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 MBLCJ20X50-50S FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push force increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
No, the rear adjuster is a travel stop that sets the 0-50 mm end position, not a lock or brake; it cannot hold a load against external forces. The adjustable air cushion is a separate screw-tunable feature that regulates deceleration speed near the end caps to prevent impact damage.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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