Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X30-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X30-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 30mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 10–30mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke30 mm
- Adjustable10–30 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X30-20S
The AirTAC MBLCJ40X30-20S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The rear stopper trims up to 20 mm of travel, providing a usable stroke window of 10-30 mm for precise short-distance positioning. The built-in magnet (-S) supports CMSG reed and DMSG/EMSG electronic sensors for exact rod tracking.
Unlike the base 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 fast moves. The riveted rolling-packed barrel and 20 µm hard-chrome plated carbon-steel rod withstand harsh environments, while the grease-retaining piston seal ensures long lubrication. Remember the rear stopper sets the travel end; it does not lock the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X30-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X30-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 30 mm |
| Adjustable window | 10–30 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 500 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 MBLCJ40X30-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×30 | Nominal stroke length in mm. |
| -20 | 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 MBLCJ40X30-20S Is Used
PCB Router Z-Axis
Drives the spindle plunge on a desktop PCB routing machine, using the 10-30 mm usable window to dial in the exact cutting depth while the air cushion prevents bounce at the board surface.
Dispenser Nozzle Height
Positions a syringe nozzle for conformal coating application, leveraging the 628 N push force to overcome spring-loaded fluid valves and the tunable cushion for drip-free stops.
Leather Stamp Press
Actuates a heated brass stamp in an artisan leather shop, applying 880 N at 0.7 MPa to emboss thick hides while the rear adjuster dials the exact impression depth.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X30-20S the Right Cylinder?
If 628 N at 0.5 MPa is excessive, step down to the 32 mm bore which yields 402 N of push force. For heavier lifting, the 50 mm bore provides 981 N. Choose this MBLCJ over the MBLJ when your application requires tunable deceleration rather than a hard bumper impact, or over the MBLC if you need to fine-tune the end position within that 10-30 mm window. The PT tapered port threads mate with standard G1/4 fittings.
When ordering a replacement, verify the 40 mm bore, 30 mm nominal stroke, 20 mm adjuster code, G1/4 port, PT thread form, and the -S magnet. Mounting is limited to Basic, FA flange, or LB foot styles; no SDB pivot or back-cover options exist. Because the cushion and adjuster only manage travel and deceleration, use an external locking device if the load must be held securely 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 MBLCJ40X30-20S FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The adjustable stroke is a rear mechanical stopper that limits travel within a 10-30 mm window. The adjustable air cushion uses needle screws to tune end-of-stroke deceleration. Neither holds a load; the stopper sets the end position and the cushion absorbs kinetic energy.
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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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