Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-20 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 20mm for a usable window of 60–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable60–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-20
The AirTAC MBLCJ20X80-20 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 (220 N at 0.7 MPa) via a G1/8 port and an Ø8 mm hard-chrome plated rod. The 20 mm rear trimmer creates a usable end-position window of 60 to 80 mm, allowing precise mechanical timing without reprogramming the PLC.
Unlike the standard MBLJ bumper version, the screw-tunable air cushion on this unit decelerates heavier loads at high cycle rates to protect the end covers. This specific SKU lacks a built-in magnet, meaning it cannot accept CMSG, DMSG, or EMSG position sensors. The riveted rolling-packed barrel and grease-retaining piston seal ensure consistent low-friction operation between 30 and 800 mm/s.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 60–80 mm (trim 20 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 MBLCJ20X80-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MBLCJ20X80-20 Is Used
PCB Depaneling Saw Feed
Uses the 60-80 mm adjustable stroke window to set the exact cutting depth for routing printed circuit boards, while the air cushion prevents snap-back shock at the end of the 80 mm traverse.
Micro-Dispenser Nozzle Height
Trims the dispensing head position in adhesive bonding lines, relying on the 157 N push force to hold the nozzle standoff precisely without needing a sensor.
Small Parts Ejector Gate
Cycles at high speeds to push tiny molded plastic parts out of a machining center, using the tunable cushion to decelerate the 8 mm rod smoothly before cover impact.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-20 the Right Cylinder?
For applications needing less reach, the 20 mm bore family caps at a 300 mm standard stroke, but stepping down to a 40 mm stroke offers a shorter footprint. If your payload requires more force, the next size up is the 32 mm bore, which provides 402 N of push force at 0.5 MPa compared to this unit's 157 N. If you need a fixed end position without rear adjustment, the MBLC series offers the same cushioning, while the MBLJ provides a fixed rubber bumper for lighter impacts.
When replacing this cylinder, match the 20 mm bore, 80 mm stroke, 20 mm adjust code, G1/8 PT thread, and Basic mounting style. Note that the rear adjuster acts only as a mechanical travel stop and does not lock the load in place; external guides must carry any side loading. Mounting is limited to Basic, FA, or LB styles, as no back-cover or SDB pivot options exist for this body type.
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 MBLCJ20X80-20 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. Because this specific model code lacks the 'S' suffix, it does not have a built-in magnet and cannot trigger AirTAC CMSG, DMSG, or EMSG switches. You must select an MBLCJ20X80-20S variant if you require electronic or reed position sensing.
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