Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 80mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 50–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable50–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30
The AirTAC MBLCJ20X80-30 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 157 N of push force at 0.5 MPa via an 8 mm carbon-steel rod. The 30 mm rear adjuster creates a usable travel window of 50 to 80 mm, ideal for fine-tuning the end position in tight assembly machinery.
This model uses a riveted rolling-packed barrel and a grease-retaining piston seal for long service life. The screw-tunable end cushions decelerate heavier loads faster than a fixed bumper, protecting the end covers. Note that this specific SKU lacks a built-in magnet, meaning it cannot support CMSG or DMSG position sensors. The rear stopper sets the travel limit but does not lock the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 50–80 mm (trim 30 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 MBLCJ20X80-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Nominal stroke length in mm. |
| -30 | 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 MBLCJ20X80-30 Is Used
PCB Depaneling Saw Feed
Uses the 50-80 mm adjustable window to set the exact cutting depth of a circular saw on a PCB depaneling router, while the air cushion prevents jarring stops.
Micro-Dispenser Valve Stroke
Trims the 30 mm rear stopper to precisely meter the stroke of a pneumatic adhesive dispenser, ensuring consistent dot sizes without end-cover impact.
Small Parts Ejector
Ejects small plastic molded parts from a pick-and-place fixture using 157 N of push force, relying on the tunable cushion to protect the 8 mm rod from snapping.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30 the Right Cylinder?
For lower force needs, stepping down to the 12 mm bore variant reduces the footprint significantly, while stepping up to the 25 mm bore increases push force to 245 N at 0.5 MPa for heavier payloads. Choose this MBLCJ over the MBLJ if your application requires tunable end-of-stroke deceleration rather than a fixed rubber bumper, or over the MBLC if you need to trim the rear travel window.
The 30 mm rear adjuster acts as a hard travel stop, not a lock; external guides or locking valves are required to hold a load stationary. Mounting is limited to Basic, FA, or LB styles, as the MBLCJ series omits back-cover and SDB pivot options. To replace this unit, match the 20 mm bore, 80 mm stroke, 30 mm adjust code, G1/8 PT port, and confirm no magnet is fitted.
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 MBLCJ20X80-30 FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N push and 132 N pull force. At 0.7 MPa, push increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa at speeds of 30-800 mm/s.
This specific SKU lacks the -S code, meaning it has no built-in magnet and cannot accept CMSG or DMSG position sensors. The 30 mm rear adjustment is a travel stop that sets the 50-80 mm end position, not a lock; it will not hold the load stationary without external air pressure.
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Standard models usually ship in 3-4 days.
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