Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 300mm nominal stroke and a rear adjustable-stroke stopper — trim up to 100mm for a usable window of 200–300mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke300 mm
- Adjustable200–300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100
The AirTAC MBLCJ40X300-100 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. The rear stopper allows you to trim up to 100 mm of travel, creating a usable stroke window of 200-300 mm. Driven by a Ø16 mm carbon-steel rod with 20 um hard-chrome plating, it delivers 628 N push and 528 N pull force at 0.5 MPa, making it well-suited for moving heavier jigs or actuators over long distances.
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 fast 300 mm moves. The riveted rolling-packed barrel and heterogeneous two-way grease-retaining piston seal ensure consistent lubrication over the 30-800 mm/s speed range. Note that this specific SKU lacks a built-in magnet, so it cannot accept a CMSG, DMSG, or EMSG position sensor without modification. The rear travel stopper sets the end position but does not lock the load; external guidance is required for position holding.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 200–300 mm (trim 100 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 MBLCJ40X300-100
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -100 | 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 MBLCJ40X300-100 Is Used
Carton Erector Arms
Drives the vacuum pickup arm on continuous-motion carton erectors, using the 200-300 mm adjustable window to time the fold stroke precisely while the air cushion halts the 628 N force smoothly.
Pallet Transfer Pushers
Pushes heavy loaded pallets onto a perpendicular chain conveyor, relying on the tunable cushion to prevent end-cover damage during rapid 300 mm ejection strokes.
Textile Guiding Frames
Actuates heavy fabric guiding frames in textile machinery, where the 100 mm rear stroke trim accommodates varying fabric widths without repositioning the entire cylinder assembly.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-100 the Right Cylinder?
If 628 N of push force at 0.5 MPa is too much for your fixture, step down to the 32 mm bore, which provides 402 N push and 346 N pull. If you need more thrust, step up to the 50 mm bore for 981 N push and 881 N pull. Choose the MBLCJ over the MBLJ when your moving mass requires tunable pneumatic deceleration rather than a fixed rubber bumper, or over the MBLC when you need the 100 mm rear travel adjustment window rather than a fixed stroke.
At 300 mm of travel, the Ø16 mm rod is highly susceptible to side-loading and bending; always mount this cylinder with an external linear guide to prevent premature seal wear. The rear adjuster is a travel stop, not a mechanical lock, and the air cushion only decelerates the piston neither will hold a load in place without live air pressure. Mounting is limited to Basic, FA (flange), or LB (foot) brackets; this series does not support SDB pivot or back-cover configurations. For a direct replacement, match the 40 mm bore, 300 mm stroke, 100 mm adjust code, G1/4 port, PT thread, and confirm no magnet is fitted. The overall length equals A + 2 x stroke + adjust.
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 MBLCJ40X300-100 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N push force and 528 N 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 rear adjuster lets you trim the stroke from 300 mm down to 200 mm. This adjuster acts as a travel stop, not a lock; it cannot hold a load in place without continuous air pressure. The adjustable air cushion only tunes the end-of-stroke deceleration and is also not a locking mechanism.
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