Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 20–40mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke40 mm
- Adjustable20–40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-20
The AirTAC MBLCJ40X40-20 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 at 0.5 MPa. The rear stopper allows you to trim up to 20 mm of travel, creating a usable stroke window of 20-40 mm for precise mechanical spacing.
This model uses a Ø16 mm carbon-steel rod with 20 µm hard-chrome plating inside a riveted rolling-packed barrel. The tunable cushioning allows faster, heavier moves without slamming the end covers. Note that this specific SKU lacks a built-in magnet, so it cannot accept CMSG, DMSG, or EMSG position sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 20–40 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 MBLCJ40X40-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MBLCJ40X40-20 Is Used
Circuit Board Drill
Drives a 40 mm micro-stroke on a PCB drilling head, using the 20-40 mm window to set exact bit depth while the cushion protects the spindle bearings.
Label Applicator
Tamps labels at high speed; the screw-tunable air cushion decelerates the 628 N push force smoothly to prevent label slippage.
Wire Cutters
Actuates a precision wire-cutting die, trimming the stroke to 25 mm to match the blade travel exactly without bottoming out.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-20 the Right Cylinder?
If you need less force, the 32 mm bore offers 402 N push at 0.5 MPa; for heavier loads, the 50 mm bore provides 981 N. Choose this MBLCJ over the MBLJ when your application requires tunable end-deceleration rather than a fixed rubber bumper, or over the MBLC when you need that rear travel-stop mechanism.
The rear adjuster sets the travel end position and the cushion only decelerates the piston—neither holds the load, so use an external lock for position holding. Mounting is limited to Basic, FA, or LB (no SDB or back-cover options). Replacement requires a 40 mm bore, 40 mm stroke, 20 mm adjust, G1/4 port, PT thread, and no 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 MBLCJ40X40-20 FAQ
At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it pushes 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The rear adjuster is a travel stop that sets your end position within a 20-40 mm window, while the adjustable air cushion only tunes deceleration near the covers. Neither acts as a lock to hold the load.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Adjustable-Stroke Cylinders
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