Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30S 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 30mm for a usable window of 320–350mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke350 mm
- Adjustable320–350 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30S
The AirTAC MBLCJ40X350-30S is a compact double-acting aluminum mini cylinder engineered for demanding mid-range motion tasks. It features a rear travel stopper that trims up to 30 mm, yielding a usable stroke window of 320-350 mm. Driven by a Ø16 mm carbon-steel rod through a G1/4 port, it delivers 628 N push and 528 N pull force at 0.5 MPa. The integrated -S magnet enables position feedback via CMSG reed or DMSG/EMSG solid-state sensors.
This unit distinguishes itself from the fixed-bumper MBLJ by utilizing a screw-tunable ADJUSTABLE AIR CUSHION at both ends to regulate end-of-stroke deceleration. The riveted rolling-packed barrel and grease-retaining piston seal ensure longevity, while the 20 um hard-chrome plating resists scuffing. The rear stopper sets the end position; it does not lock the load.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 350 mm |
| Adjustable window | 320–350 mm (trim 30 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 MBLCJ40X350-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×350 | Nominal stroke length in mm. |
| -30 | 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 MBLCJ40X350-30S Is Used
PCB Router Z-Axis
Lifts a spindle on a PCB depaneling router; the 880 N force at 0.7 MPa handles spindle weight, while the tunable cushion prevents shock at the 350 mm stroke apex.
Textile Beam Indexing
Shifts heavy fabric beams into a winding cradle; the 320-350 mm adjustable window fine-tunes the exact handoff position without re-engineering the frame.
Carton Flap Folding
Sweeps large corrugated carton flaps on a packaging line; the DMSG solid-state sensor tracks the 628 N push stroke for precise glue application timing.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X350-30S the Right Cylinder?
Stepping down to the 32 mm bore drops output to 402 N push at 0.5 MPa, while moving up to the 50 mm bore increases thrust to 981 N. Choose this 40 mm bore if your payload requires roughly 64 kgf of push force at 0.5 MPa. Compared to the MBLC (fixed stroke), this MBLCJ allows 30 mm of rear travel trimming, and unlike the MBLJ, its adjustable cushioning protects the end covers during fast 350 mm extensions.
For exact replacements, match the 40 mm bore, 350 mm nominal stroke, 30 mm adjust code, G1/4 port, PT thread, and the -S magnet. Mounting is restricted to Basic, FA flange, or LB foot (no SDB or back-cover options). Because the 350 mm stroke is long relative to the 16 mm rod, external guide rails are strongly recommended to prevent rod bending and premature seal wear. The cushion and stopper decelerate and set travel limits but do not hold position pneumatically.
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 MBLCJ40X350-30S FAQ
At 0.5 MPa, the 40 mm bore delivers 628 N push and 528 N pull force. Raising pressure to 0.7 MPa yields 880 N push. The maximum theoretical force is 128 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
The rear adjuster is a mechanical travel stop that limits the stroke window to 320-350 mm. The adjustable air cushion is a separate screw-tunable valve that controls end-of-stroke deceleration speed. Neither component locks or holds the load pneumatically.
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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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