Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 20mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 0–20mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke20 mm
- Adjustable0–20 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- 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 MBLCJ40X20-20
The AirTAC MBLCJ40X20-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. With a 40mm bore, it delivers 628N push and 528N pull force at 0.5 MPa. The adjustment code allows you to trim up to 20mm of travel at the rear, providing a usable stroke window of 0 to 20mm for precise short-stroke positioning.
Unlike the fixed bumper on an MBLJ, the screw-tunable air cushion on this SKU allows you to regulate end-of-stroke deceleration, protecting the end covers during faster or heavier moves. The riveted rolling-packed barrel and 20um hard-chrome plated carbon-steel rod handle speeds up to 800mm/s. This specific configuration lacks the built-in magnet (-S), meaning it cannot accept a CMSG, DMSG, or EMSG position sensor.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 20 mm |
| Adjustable window | 0–20 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 MBLCJ40X20-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×20 | 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 MBLCJ40X20-20 Is Used
PCB Router Z-Axis
Drives a short 0-20mm plunge on a PCB depaneling router, using the tunable cushion to soften the 628N end-impact and prevent board fracture.
Bottle Capper Head
Applies precise downward capping force on a beverage line, trimming the rear stopper to perfectly time the cap seating without crushing the cap.
Pneumatic Press Pin
Acts as a compact pin-insertion press for small electronic connectors, relying on the 528N pull force to retract the tooling quickly.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X20-20 the Right Cylinder?
This 40mm bore generates 628N of push force at 0.5 MPa. If your application requires less force, the 32mm bore offers 402N; for heavier loads, stepping up to the 50mm bore provides 981N. Choose the MBLCJ over the MBLJ when you need tunable end-cushioning rather than a fixed rubber bumper, or over the MBLC when you require the 0-20mm rear travel adjustment. Remember that the rear stopper sets the travel end and the cushion only decelerates; neither holds the load, so an external lock is needed for position holding. Mounting is limited to Basic, FA (flange), or LB (foot) as there is no back-cover or SDB pivot option. To replace this exact unit, match the 40mm bore, 20mm stroke, 20mm adjust code, G1/4 port, PT thread, and confirm no magnet is fitted.
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 MBLCJ40X20-20 FAQ
At 0.5 MPa, this 40mm bore cylinder provides 628N of push force and 528N of pull force. At 0.7 MPa, the push force increases to 880N. The maximum theoretical force is 128 kgf at 1.0 MPa. The nominal stroke is 20mm, but the rear adjuster allows you to trim the effective travel down to 0mm.
No, this specific SKU lacks the -S magnet, so it cannot accept CMSG, DMSG, or EMSG position sensors. The rear adjuster is a travel stop that sets the end position, and the adjustable air cushion only controls deceleration speed; neither component mechanically locks or holds the load in place.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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