Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40S 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 MBLCJ20X75-40S
The AirTAC MBLCJ20X75-40S is a compact double-acting aluminum mini cylinder featuring a rear travel adjuster and tunable air cushions at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. The rear stopper lets you trim up to 40 mm of travel, creating a precise 35-75 mm usable stroke window for exact end-positioning. Equipped with a built-in magnet (-S), it supports CMSG reed and DMSG or EMSG electronic sensors for rod detection.
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 8 mm carbon-steel rod features 20 µm hard-chrome plating, and the riveted rolling-packed barrel uses a grease-retaining piston seal. Remember the rear adjuster is a travel stop, not a load lock; external guides are recommended to prevent side-load bending on the small rod.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40S |
|---|---|
| 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 MBLCJ20X75-40S
| 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 MBLCJ20X75-40S Is Used
PCB Pick & Place
Drives a small vacuum pick head for electronic component placement, using the 35-75 mm stroke window to dial in exact Z-axis drop height without mechanical spacers.
Dispenser Valve Actuation
Actuates a metering valve for adhesive application, relying on the tunable air cushion to prevent fluid splashing at the 75 mm stroke end.
Lightweight Part Ejection
Pushes small molded plastic parts out of a machining fixture, using the 157 N push force and the -S magnet to confirm ejection completion.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-40S the Right Cylinder?
Choose this 20 mm bore when an application requires exactly 157 N of push force at 0.5 MPa within a 35-75 mm travel window. If you need less force, step down is not possible as 20 mm is the smallest size. If your machine requires more power, step up to the 25 mm bore, which provides 245 N of push force at 0.5 MPa. The adjustable air cushion makes it superior to the MBLJ for heavier moving loads, while the MBLC offers the same cushioning but with a fixed stroke length.
When ordering a replacement, verify the 20 mm bore, 75 mm nominal stroke, 40 mm adjust code, G1/8 port, PT thread, and the -S magnet. Mounting is limited to Basic, FA flange, or LB foot styles; there is no back-cover or SDB pivot option. Because the overall length equals A + 2 x stroke + adjust, ensure your envelope accommodates the extended dimensions. Neither the rear stopper nor the air cushion will 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 MBLCJ20X75-40S FAQ
At 0.5 MPa, the push force is 157 N and the pull force is 132 N. At 0.7 MPa, the push force is 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa operating pressure.
The 40 mm adjustable stroke is a mechanical rear stopper that physically limits travel, creating a 35-75 mm usable window. The adjustable air cushion is a separate screw-tunable valve that regulates exhaust flow to decelerate the piston near the end covers. Neither feature locks the load in place.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Most inquiries answered within 7-8 hours.
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