Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40 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 40mm for a usable window of 35–75mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke75 mm
- Adjustable35–75 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40
The AirTAC MBLCJ20X75-40 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a screw-tunable air cushion at both ends. With a 20mm bore, it delivers 157N push and 132N pull force at 0.5 MPa. The 40mm rear adjuster sets a usable travel window of 35-75mm, allowing you to fine-tune the end position without moving the physical mount.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this MBLCJ variant uses adjustable end-of-stroke cushioning to decelerate faster or heavier loads smoothly, protecting the end covers. The riveted rolling-packed aluminum barrel and 20μm hard-chrome plated carbon-steel rod handle speeds from 30 to 800 mm/s. Note this SKU lacks a built-in magnet, so it cannot accept CMSG or DMSG position sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 75 mm |
| Adjustable window | 35–75 mm (trim 40 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 MBLCJ20X75-40
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -40 | 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 MBLCJ20X75-40 Is Used
PCB Pick-and-Place
Tunes the 35-75mm travel to precisely seat SMD components on PCB panels, using the adjustable air cushion to halt the 157N thrust gently without cracking fragile boards.
Dispenser Valve Actuation
Trims the rear stopper to set exact micro-dosing strokes for adhesive applicators, while the tunable end-cushioning prevents fluid splashing from sudden rod stops.
Light-Duty Wire Feeder
Feeds fine-gauge wire in small electronic assembly machines; the 20mm bore's 132N pull force retracts the guide reliably, and the PT-threaded G1/8 port fits compact manifolds.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40 the Right Cylinder?
This 20mm bore generates 157N of push force at 0.5 MPa. If your application requires less force, there is no smaller bore in the MBL series, but if you need more power, stepping up to the 25mm bore yields 245N push at 0.5 MPa. Choose the MBLCJ over the MBLJ when your moving mass threatens to slam the end covers and requires tunable pneumatic damping rather than a static rubber stop.
When replacing this unit, match the 20mm bore, 75mm stroke, 40mm adjust code, G1/8 port, and PT thread. Mounting is limited to Basic, FA flange, or LB foot (no SDB or back-cover options). Remember the rear adjuster is a travel stop, and the air cushion only decelerates; neither mechanism will lock or hold a load in place without live air pressure.
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 MBLCJ20X75-40 FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N push and 132N pull. At 0.7 MPa, the push increases to 220N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The 40mm adjustable stroke is a mechanical rear stopper that sets your actual end-of-travel position (yielding a 35-75mm window), whereas the adjustable air cushion uses screw-tunable pneumatic damping to decelerate the piston near the end of the stroke. Neither feature locks or holds the load without continuous air pressure.
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