Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-75
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-75 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 80mm nominal stroke and a rear adjustable-stroke stopper — trim up to 75mm for a usable window of 5–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable5–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-75
The AirTAC MBLCJ20X80-75 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 rear stopper allows you to trim up to 75 mm of travel, creating a highly precise usable stroke window of 5 to 80 mm for short-stroke clamping or positioning tasks.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke deceleration to absorb kinetic energy, protecting the end covers during faster cycling. The riveted rolling-packed barrel and 20 um hard-chrome plated carbon-steel rod ensure durability, while the Ø8 mm piston rod requires an external guide to prevent side-load bending. Note that this specific SKU lacks a built-in magnet and cannot support a CMSG, DMSG, or EMSG position sensor.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-75 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-75 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 5–80 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 MBLCJ20X80-75
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MBLCJ20X80-75 Is Used
PCB Edge Routing Dampener
Uses the 5-80 mm travel window to precisely set the cutting depth on a PCB depaneling router, while the adjustable air cushion protects the end covers from the 800 mm/s high-speed impact.
Micro-Dispenser Stroke Trimmer
Adjusts the rear stopper to fine-tune the exact shot volume of a pneumatic adhesive dispenser, relying on the 157 N push force to actuate the fluid valve without overshooting.
Pick-and-Place Z-Axis Brake
Decelerates a small SMD pick-and-place head at the bottom of its 80 mm travel, using the screw-tunable cushion to prevent shock loads from damaging the 8 mm rod.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-75 the Right Cylinder?
Choose this 20 mm bore when you need exactly 157 N of push force at 0.5 MPa within a tight footprint. If your application requires less force, the neighbouring smaller bore is unavailable, making this the entry point for the series; if you need more power, stepping up to the 25 mm bore yields 245 N of push force. Select the MBLCJ over the MBLJ when your moving mass demands tunable end-deceleration rather than a fixed bumper, or over the MBLC when you require the 5 to 80 mm variable travel window.
Remember that the rear adjuster acts only as a travel stop, and the cushion solely decelerates the piston; neither component can hold a load in place, so external locking is required for static positioning. Mounting is restricted to Basic, FA (flange), or LB (foot) styles, as there is no back-cover or SDB pivot option. The overall length extends by the adjustment amount. To replace this unit, match the 20 mm bore, 80 mm stroke, 75 mm adjust code, G1/8 port, PT thread, and confirm no magnet is present.
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 MBLCJ20X80-75 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, and the maximum theoretical force is 32 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa at speeds of 30-800 mm/s.
This SKU does not have a built-in magnet, so it cannot support AirTAC CMSG, DMSG, or EMSG position sensors. Additionally, the 75 mm rear adjuster is strictly a travel stop that sets the 5-80 mm usable window, and the air cushion only decelerates the piston; neither feature locks or holds the load in place.
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