Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-50S 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 50mm for a usable window of 30–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable30–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-50S
The AirTAC MBLCJ20X80-50S is a compact double-acting mini round cylinder featuring a rear travel adjuster and a tunable air cushion at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. The integrated magnet (-S) supports CMSG reed and DMSG or EMSG solid-state sensor switches for precise position detection. With a nominal 80 mm stroke and a 50 mm rear adjuster, the usable travel window spans 30 to 80 mm.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable pneumatic cushioning to decelerate loads smoothly near each end cap, protecting the internal components during faster cycles. The riveted aluminum barrel and 20 µm hard-chrome plated carbon-steel rod provide durable service in tight spaces. The rear stroke adjuster acts strictly as a mechanical travel stop to set the end position; it does not lock or hold the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 30–80 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 MBLCJ20X80-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MBLCJ20X80-50S Is Used
PCB Pick-and-Place Ejection
Tunes the 30-80 mm travel window to eject populated circuit boards at the end of an SMT line, using the adjustable air cushion to prevent sudden stops that would dislodge delicate components under 157 N of force.
Lab Dispenser Valve Actuation
Drives a precision micro-dispensing valve for reagents, where the tunable end-of-stroke deceleration protects the glass syringe mechanism and the -S magnet confirms the exact dispense shot.
Small-Part Sorter Diverter
Actuates a diverter gate on a pharmaceutical tablet sorting chute, benefiting from the compact riveted aluminum body to fit within tight machine guarding while handling light 132 N pull loads.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-50S the Right Cylinder?
For lighter duty, stepping down to the 12 mm bore variant offers roughly 55 N of push force at 0.5 MPa, whereas stepping up to the 25 mm bore provides 245 N for heavier pushing. This 20 mm bore bridges that gap efficiently. Choose the MBLCJ over the MBLJ when your moving mass requires active deceleration to prevent end-cap impact, or over the MBLC when you need to fine-tune the end position within that 30-80 mm window.
Remember that neither the rear stopper nor the cushion needle acts as a load lock; the single rod will drift without live air pressure, so use an external guide or braking mechanism for position holding. Mounting is limited to Basic, FA flange, or LB foot brackets, as this series omits the SDB pivot and back-cover options. To match this exact replacement, specify: 20 mm bore, 80 mm stroke, 50 mm adjust code, G1/8 port, PT thread, and the -S magnet.
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 MBLCJ20X80-50S FAQ
At 0.5 MPa, the push force is 157 N and the pull force is 132 N. At 0.7 MPa, the push force increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa. The operating pressure range is 0.15 to 1.0 MPa.
The 50 mm rear adjuster allows you to mechanically trim the 80 mm nominal stroke down to a 30 mm minimum, creating a usable 30-80 mm travel window. This adjuster is a travel stop that sets the end position; it is not a lock and will not hold the load without continuous air pressure. The separate adjustable air cushion only controls the deceleration speed near that end point.
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