Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-40S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-40S 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 40mm for a usable window of 260–300mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke300 mm
- Adjustable260–300 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-40S
The AirTAC MBLCJ40X300-40S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The 40 mm adjustable code lets you trim up to 40 mm of rear travel, creating a usable stroke window of 260 to 300 mm for precise end-position tuning.
This model includes a built-in magnet for CMSG, DMSG, or EMSG sensor switches. Unlike the fixed rubber bumper on an MBLJ, the screw-tunable cushion valves decelerate heavy 300 mm moves to protect the end covers. The riveted rolling-packed barrel and 20 µm hard-chrome carbon-steel rod resist wear, though the 16 mm rod requires an external guide to prevent bending at full extension.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-40S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-40S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 260–300 mm (trim 40 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 MBLCJ40X300-40S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -40 | 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 MBLCJ40X300-40S Is Used
PCB Conveyor Diverter
Shifts populated PCBs between reflow and inspection lanes. The 260-300 mm stroke window fine-tunes the gate position, while the 628 N push force handles board cassettes and the cushion prevents end-impact bounce.
Bottle Capping Head
Lowers a torque head onto plastic bottle threads. The rear adjuster sets the exact 260 mm downstop for consistent cap tightness, and the tunable cushion protects the thread mechanism from hard 300 mm drops.
Textile Fabric Guide
Positions a folding blade across a fabric web. The 528 N pull force retracts the 300 mm rod smoothly, and the DMSG solid-state sensor tracks the blade position for automated loom sequencing.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X300-40S the Right Cylinder?
Step down to the 32 mm bore if your load requires only 402 N of push force at 0.5 MPa, or step up to the 50 mm bore for 981 N if moving heavier jigs. Choose this MBLCJ over the MBLJ when you need active end-of-stroke deceleration rather than a fixed rubber bumper, or over the MBLC if your machine timing requires trimming the travel window rather than using a fixed stroke.
The rear adjuster acts as a mechanical travel stop, and the air cushion only decelerates; neither holds the load, so fit an external lock for position holding. Mounting is limited to Basic, FA, or LB since there is no back-cover or SDB option. To replace this unit, match the 40 mm bore, 300 mm stroke, 40 mm adjust code, G1/4 PT port, and the -S magnet. Given the 300 mm stroke, always support the load to prevent side-load rod bending.
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 MBLCJ40X300-40S FAQ
At 0.5 MPa it provides 628 N push and 528 N pull force. At 0.7 MPa the push increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The rear 40 mm adjuster sets the physical travel stop, giving a usable window of 260 to 300 mm. The adjustable air cushion valves at both ends screw-tune the end-of-stroke deceleration. The adjuster is a travel stop and the cushion only decelerates; neither holds the load, so you need an external locking device for position holding.
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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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