Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X60-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X60-30S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 60mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 30–60mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke60 mm
- Adjustable30–60 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X60-30S
The AirTAC MBLCJ20X60-30S is a compact double-acting aluminum mini cylinder featuring a rear stroke 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 30 mm adjustment code lets you trim the rear travel, creating a usable stroke window of 30 to 60 mm for exact positioning. A built-in magnet (-S) enables position feedback via CMSG reed or DMSG and EMSG solid-state sensors.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air cushioning to decelerate the piston near the end caps, absorbing impact for faster cycling. The riveted aluminum barrel and 20 µm hard-chrome plated carbon-steel rod provide durability, while the heterogeneous two-way grease-retaining piston seal maintains lubrication. Remember, the rear stopper sets the travel end point; it does not lock the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X60-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X60-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 60 mm |
| Adjustable window | 30–60 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 MBLCJ20X60-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×60 | 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 MBLCJ20X60-30S Is Used
PCB Edge Routing
Drives a light routing head on a printed circuit board panelizer, using the 30 to 60 mm stroke window to dial in exact cut depth while the air cushion protects the aluminum end covers during fast retraction.
Dosing Valve Pin
Actuates a metering pin on a low-viscosity adhesive dispenser, where the 157 N push force at 0.5 MPa is sufficient to open the nozzle and the -S magnet confirms closure via a DMSG solid-state sensor.
Thin-Film Web Guide
Tensions a delicate film web roller in a packaging machine, using the rear adjuster to set a precise 45 mm travel stop, preventing material tear without needing a bulky ISO 15552 cylinder.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X60-30S the Right Cylinder?
With a 20 mm bore generating 157 N push at 0.5 MPa, this cylinder fits light-duty tasks. If your application needs less force, there is no smaller bore in this series, but stepping up to a 25 mm bore increases push force to 245 N. Choose the MBLCJ over the MBLJ when your cycle speed requires tunable end-cushioning rather than a fixed bumper, or over the MBLC if you need on-the-fly stroke trimming. The overall length equals A + 2 x 60 mm + 30 mm, meaning a longer footprint than fixed-stroke types.
Mounting is limited to Basic, FA flange, or LB foot styles; SDB pivot and back-cover options are not available for this series. Neither the adjustable stroke stopper nor the air cushion acts as a load-holding brake; external lock mechanisms are required to prevent rod drift under load. For an exact replacement, match the 20 mm bore, 60 mm stroke, 30 mm adjust code, G1/8 port, PT thread, and the -S magnet. The Ø8 mm rod is susceptible to side-loading, so use an external guide for this 60 mm stroke.
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 MBLCJ20X60-30S FAQ
At 0.5 MPa, the 20 mm bore provides 157 N of push force and 132 N of pull force. At 0.7 MPa, push force increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The rear adjustable stroke is a mechanical travel stop that lets you trim the usable stroke from 30 to 60 mm; it does not lock or hold the load. The adjustable air cushion is a screw-tunable valve that decelerates the piston near the end caps to absorb impact energy. Neither feature holds position without live air pressure.
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