Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 75mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 25–75mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke75 mm
- Adjustable25–75 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-50S
The AirTAC MBLCJ20X75-50S is a compact double-acting mini cylinder featuring a 20mm bore and a 75mm stroke. It integrates a rear stroke adjuster allowing you to trim up to 50mm of travel, creating a usable 25-75mm end-position window. Delivering 157N of push force at 0.5 MPa, it is built with a riveted aluminum barrel and a 20um hard-chrome plated carbon-steel rod. The included -S magnet enables position detection via CMSG, DMSG, or EMSG switches.
Unlike the base MBLJ which relies on a fixed rubber bumper, this MBLCJ variant features a screw-tunable adjustable air cushion at both ends to manage deceleration for faster moves. The rear stopper sets the travel end but does not lock or hold the load; external mechanics are required for position holding. With its G1/8 port and M8x1.25 rod thread, it suits tight spaces where precise stopping and smooth end-of-stroke damping are required.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 75 mm |
| Adjustable window | 25–75 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 MBLCJ20X75-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 MBLCJ20X75-50S Is Used
PCB Edge Belt Trimming
Dials in a 25-75mm travel window to trim conveyor belt edges on PCB routing machines, using the adjustable air cushion to prevent end-cover shock during rapid routing.
Small Parts Ejector
Deploys 157N of push force at 0.5 MPa to eject micro-switch housings from an injection mold, tuning the rear stopper to match varying part thicknesses.
Label Applicator Tamp
Applies tamper-evident seals on pharmaceutical vials, using the DMSG electronic sensor to confirm the 25mm retracted position and the cushion to protect the applicator head.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-50S the Right Cylinder?
For lower force needs, stepping down to the 12mm bore variant yields less thrust, while stepping up to the 25mm bore provides 245N push force at 0.5 MPa. Choose the MBLCJ over the MBLJ when your cycle speeds require tunable end-cover protection rather than a fixed bumper, or over the MBLC if you need to trim the 25-75mm travel window rather than using a fixed stroke. Remember the rear adjuster is a travel stop, not a lock, and the cushion only decelerates. Mounting is limited to Basic, FA, or LB; no SDB or back-cover options exist for this body. Replacement matches: 20mm bore, 75mm stroke, 50mm adjust code, G1/8 PT thread, and an 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 MBLCJ20X75-50S FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N push and 132N pull force. At 0.7 MPa, push increases to 220N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The rear stroke adjuster acts as a mechanical travel stop, allowing you to trim the usable stroke down to 25mm from the 75mm nominal. The adjustable air cushion uses a screw to tune end-of-stroke deceleration, protecting the end covers from impact. Neither mechanism locks or holds the load in place.
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Standard models usually ship in 3-4 days.
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