Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40 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 40mm for a usable window of 310–350mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke350 mm
- Adjustable310–350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40
The AirTAC MBLCJ40X350-40 is a compact double-acting mini cylinder featuring a rear stroke adjuster and screw-tunable air cushions at both ends. It delivers 628 N of push force at 0.5 MPa via a Ø16 mm carbon-steel rod. The rear stopper allows you to trim up to 40 mm of travel, creating a 310-350 mm usable stroke window for precise end-positioning. Unlike the fixed rubber bumper on an MBLJ, this adjustable cushion lets you tune end-of-stroke deceleration to protect the end covers during heavier, faster moves.
This 40 mm bore uses a G1/4 port and an M12x1.25 rod-end thread. The riveted aluminum barrel keeps the body light for tight spaces, while the two-way grease-retaining piston seal maintains lubrication over long cycles. Note that this specific SKU lacks a built-in magnet, so it cannot accept CMSG, DMSG, or EMSG position sensors. The rear adjuster is strictly a travel stop, not a load-holding lock, and the cushion only governs deceleration.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 310–350 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 MBLCJ40X350-40
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | 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 MBLCJ40X350-40 Is Used
Textile Loom Beater Motion
Uses the 310-350 mm stroke window to fine-tune the reed travel distance, while the adjustable cushion absorbs the 628 N impact at the end of each weaving cycle to prevent cover damage.
Pallet Transfer Diverter
Pushes heavy pallets onto a secondary conveyor line, relying on the 880 N push force at 0.7 MPa to overcome friction and the tunable air cushion to halt the 350 mm stroke smoothly.
CNC Lathe Bar Feed Stop
Acts as an adjustable stopper for raw bar stock, using the 40 mm rear adjustment to dial in the exact cut-off length without repositioning the entire cylinder mount.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-40 the Right Cylinder?
If 628 N at 0.5 MPa is too much force, step down to the 32 mm bore, which provides 402 N of push force. If you need more thrust, the 50 mm bore offers 981 N. Because this 350 mm stroke exceeds the 300 mm threshold, the small 16 mm rod is highly susceptible to bending under side loads—an external guide mechanism is mandatory to prevent premature seal failure.
When replacing this unit, match the 40 mm bore, 350 mm stroke, 40 mm adjust code, G1/4 port, PT thread, and Basic mounting style. This SKU has no magnet (-S omitted), meaning no sensor can be fitted. Remember that mounting is restricted to Basic, FA, or LB; there is no SDB pivot or back-cover option. The overall length equals A + 2 x stroke + adjust, and neither the cushion nor the rear stopper will hold a load in place without live air pressure.
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 MBLCJ40X350-40 FAQ
At 0.5 MPa, this double-acting 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa.
No, this specific SKU lacks the built-in magnet (denoted by an -S suffix in the order code), so it cannot accept AirTAC CMSG, DMSG, or EMSG position sensors. Additionally, the rear stroke adjuster is a travel stop, not a lock, and the adjustable air cushion only controls deceleration; neither will hold the load in place without continuous air pressure.
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