Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 350mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 330–350mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke350 mm
- Adjustable330–350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-20
The AirTAC MBLCJ40X350-20 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 and 528 N of pull force at 0.5 MPa, making it well-suited for driving heavier jigs over its 350 mm travel. The rear stopper allows you to trim up to 20 mm of travel, creating a precise usable stroke window of 330 to 350 mm.
Unlike the base MBLJ with its fixed rubber bumper, this model uses screw-tunable end-of-stroke deceleration to absorb kinetic energy from long, heavy moves and protect the end covers. The riveted rolling-packed barrel and 20 um hard-chrome plated carbon-steel rod provide durability. Because this SKU lacks the -S magnet code, it cannot accept a CMSG, DMSG, or EMSG position sensor. The rear adjuster is strictly a travel stop, not a mechanical lock, so external guides are recommended for this 350 mm stroke to prevent rod bending.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 330–350 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 MBLCJ40X350-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 MBLCJ40X350-20 Is Used
Textile Loom Beater Motion
Drives the heavy reed frame over a 330-350 mm adjustable path, using the tunable air cushions to soften the rapid end-of-stroke reversal without hammering the aluminum covers.
Packaging Carton Flap Folder
Folds large corrugated box flaps with 628 N of push force at 0.5 MPa, relying on the 20 mm rear stroke trim to synchronize the fold timing with the main conveyor.
CNC Lathe Bar Feeder Eject
Ejects metal bar stock through the spindle, using the 350 mm stroke to clear the chuck while the adjustable cushion prevents the rod from slamming back into the rear cover.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-20 the Right Cylinder?
When sizing this 40 mm bore, consider stepping down to the 32 mm version if your load requires only 402 N of push force at 0.5 MPa, or stepping up to the 50 mm bore for 981 N to handle much heavier payloads. Choose the MBLCJ over the MBLJ when your moving mass at 350 mm travel requires active deceleration rather than a fixed bumper, or over the MBLC if you need the 330-350 mm rear travel adjustment window rather than a fixed length. The adjustable air cushion manages end-of-stroke impact, and the rear adjuster sets the travel end, but neither feature acts as a load-holding brake; you must maintain live air or use an external locking device to hold position. Mounting is limited to Basic, FA flange, or LB foot styles (no SDB pivot or back-cover options). For an exact replacement, match the 40 mm bore, 350 mm stroke, 20 mm adjust code, G1/4 port, PT thread, and non-magnet configuration.
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 MBLCJ40X350-20 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N push and 528 N pull. At 0.7 MPa, the push increases to 880 N. The maximum operating pressure is 1.0 MPa, yielding a theoretical max of 128 kgf.
The rear adjuster mechanically trims the travel end from 330 to 350 mm, while the adjustable air cushion screw-tunes the end-of-stroke deceleration rate. Neither the cushion nor the stopper is a lock; the cylinder cannot hold position without live air pressure.
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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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