Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-75S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-75S 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 75mm for a usable window of 0–75mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke75 mm
- Adjustable0–75 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-75S
The AirTAC MBLCJ20X75-75S is a compact, double-acting aluminum mini cylinder featuring a single rod and an G1/8 port. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. Equipped with a built-in magnet (-S), it supports CMSG reed and DMSG or EMSG solid-state sensor switches for precise end-position detection. The PT-threaded porting and M8x1.25 rod-end thread ensure straightforward integration into existing pneumatic setups.
This model uniquely pairs a rear travel stopper with a screw-tunable air cushion at both ends. The rear adjuster allows you to trim up to 75 mm of travel, creating a highly flexible 0-75 mm usable stroke window. Unlike the standard MBLJ which relies on a fixed rubber bumper, the adjustable air cushion here lets you dial in end-of-stroke deceleration for faster cycling while protecting the end covers. The riveted rolling-packed aluminum barrel and 20 um hard-chrome plated carbon-steel rod provide durable service in tight spaces.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-75S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-75S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 75 mm |
| Adjustable window | 0–75 mm (trim 75 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 MBLCJ20X75-75S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ20X75-75S Is Used
PCB Edge Routing
Deploys the 0-75 mm stroke window to precisely feed and trim depaneling router heads, using the tunable cushion to stop the 8 mm rod smoothly without shocking the lightweight aluminum fixture.
Label Applicator Tamp
Uses 157 N of push at 0.5 MPa to tamp labels onto small cartons, relying on the adjustable air cushion to decelerate the rapid 75 mm travel and prevent label slippage.
Small Part Ejector
Cycles at high speed to eject molded plastic parts from a press, where the DMSG solid-state sensor verifies full retraction and the cushion protects the rear cover from impact.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-75S the Right Cylinder?
With a 20 mm bore, this cylinder provides 157 N push force at 0.5 MPa. If your application requires less force, a smaller option is not available in this series, but if you need substantially more thrust, stepping up to the 25 mm bore yields 245 N push at 0.5 MPa. Choose the MBLCJ over the MBLJ when your cycle speeds demand tunable end-cover protection rather than a fixed bumper, or over the MBLC when you require the rear travel adjuster. The overall length is calculated as A + 2 x stroke + adjust, meaning this 75 mm adjuster extends the rear dimension significantly.
Remember that the rear adjuster is a travel stop, not a mechanical lock; it sets the end position but cannot hold a load in place without continuous air pressure. The cushion only decelerates the piston and also does not lock the rod. Mounting is limited to Basic, FA flange, or LB foot styles—this series explicitly omits the SDB pivot and back-cover options. For an exact replacement, match the 20 mm bore, 75 mm nominal stroke, 75 mm adjust code, PT port thread, and the -S magnet specification.
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 MBLCJ20X75-75S FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push force increases to 220 N. The maximum theoretical force is 32 kgf at the 1.0 MPa operating pressure limit.
The 75 mm adjustable stroke is a rear travel stopper that lets you trim the usable stroke window down to 0 mm. The adjustable air cushion is a separate screw mechanism that tunes the end-of-stroke deceleration speed. Neither mechanism locks or holds the load without live air pressure.
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