Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X150-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X150-40S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 150mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 110–150mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke150 mm
- Adjustable110–150 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X150-40S
The AirTAC MBLCJ20X150-40S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. It delivers 157 N of push force at 0.5 MPa. The -40S code means you can trim up to 40 mm of rear travel, creating a usable stroke window of 110 to 150 mm. This makes it ideal for applications requiring exact end-position tuning without machining new mountings.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable end-of-stroke deceleration to absorb kinetic energy and protect the end covers during faster cycles. The riveted aluminum barrel and 20 µm hard-chrome plated Ø8 carbon-steel rod provide durable service. The built-in magnet (-S) allows position detection using CMSG reed or DMSG/EMSG electronic switches.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X150-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X150-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 150 mm |
| Adjustable window | 110–150 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 MBLCJ20X150-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×150 | 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 MBLCJ20X150-40S Is Used
PCB Router Z-Axis
Uses the 110-150 mm adjustable window to precisely set the plunge depth of a spindle on a desktop PCB milling machine, while the air cushion prevents bounce at stroke end.
Dispenser Snuff-Back
Governs the fast retraction of a fluid dispensing needle valve, tuning the 157 N pull force to snap the nozzle back instantly and prevent stringing on epoxy dots.
Textile Tension Guide
Feeds yarn into a loom beam winder, using the tunable end position to compensate for material thickness variations without reprogramming the PLC.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X150-40S the Right Cylinder?
With a 157 N push force at 0.5 MPa, stepping down to a Ø12 bore is not an option in this series, but you could drop to the smaller 20 mm base variants if less travel is needed. Conversely, stepping up to the Ø25 bore yields 245 N of push force for heavier loads. Choose the MBLCJ over the MBLJ when your cycle speeds demand adjustable deceleration rather than a fixed bumper, or over the MBLC when you need that rear travel-stop flexibility.
Remember that the rear adjuster is a travel stop, not a load lock; the cylinder cannot hold position without live air, and the cushion only decelerates. Mounting is limited to Basic, FA, or LB styles, as there is no back-cover or SDB pivot option. For a direct replacement, match the 20 mm bore, 150 mm stroke, 40 mm adjust code, G1/8 port, PT thread, and the -S magnet.
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 MBLCJ20X150-40S 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.
The rear stroke adjuster physically stops the piston early, giving you a usable travel window of 110 to 150 mm. The adjustable air cushion only tunes the deceleration rate at the end of that travel. Neither mechanism locks or holds the load in place.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Most inquiries answered within 7-8 hours.
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