Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-30S 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 30mm for a usable window of 45–75mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke75 mm
- Adjustable45–75 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-30S
The AirTAC MBLCJ20X75-30S 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 and 132 N of pull force at 0.5 MPa. The 30 mm rear stopper allows you to tune the usable travel window down from 75 mm to a 45-75 mm range, providing exact end-position flexibility for short-stroke assembly tasks.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air deceleration to smooth out end-of-stroke impacts, protecting the end covers during faster cycling. The built-in magnet (-S) enables position detection with CMSG reed or DMSG/EMSG electronic switches. The Ø8 mm hard-chrome plated carbon-steel rod and riveted rolling-packed barrel ensure durable, low-friction operation in tight machinery spaces.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 75 mm |
| Adjustable window | 45–75 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 MBLCJ20X75-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 MBLCJ20X75-30S Is Used
PCB Pick & Place
Drives a small vacuum gripper for electronic board component placement, using the 45-75 mm travel window to dial in exact insertion depth without reprogramming the PLC.
Dispenser Valve Actuation
Actuates a micro-dispense valve for adhesive bead application, relying on the adjustable air cushion to prevent fluid splashing at the stroke end.
Light Part Ejection
Pushes small plastic clips from a molding fixture, using the 157 N push force and the -S magnet to confirm ejection via a DMSG electronic sensor.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-30S the Right Cylinder?
Choose this 20 mm bore when you need 157 N push at 0.5 MPa with fine travel tuning. If your payload is lighter, stepping down is not an option as this is the smallest available size. If you need more force, the 25 mm bore offers 245 N push. Select the MBLCJ over the MBLJ when your cycle speeds require tunable pneumatic deceleration rather than a fixed bumper, or over the MBLC when you need that rear travel stopper.
Remember the rear adjuster sets the travel end but does not hold the load, and the cushion only decelerates; neither acts as a lock. Mounting is limited to Basic, FA flange, or LB foot styles, with no back-cover or SDB pivot options available. The exact replacement match requires a 20 mm bore, 75 mm stroke, 30 mm adjust code, G1/8 port, PT thread, and the -S magnet. For this 75 mm stroke, ensure external guides support side loads to prevent bending the 8 mm rod.
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 MBLCJ20X75-30S FAQ
At 0.5 MPa it provides 157 N push and 132 N pull. At 0.7 MPa the push force is 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa, with a speed range of 30-800 mm/s.
The rear adjuster lets you trim the stroke from 75 mm down to a 45 mm minimum, creating a 45-75 mm usable window. This adjuster acts strictly as a mechanical travel stop, not a lock. The adjustable air cushion only controls end-of-stroke deceleration, so the cylinder cannot hold a load without live air pressure.
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1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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