Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 10–40mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke40 mm
- Adjustable10–40 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-30
The AirTAC MBLCJ40X40-30 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. The 30 mm rear trimmer creates a usable travel window of 10 to 40 mm, allowing you to dial in the exact end position for a 40 mm cycle without machining hard stops.
Unlike the fixed rubber bumper found on the base MBLJ series, the screw-tunable air cushion on this SKU decelerates heavier loads before impact, protecting the end covers during fast cycling. The riveted rolling-packed barrel and 20 um hard-chrome plated carbon-steel rod handle pressures up to 1.0 MPa. Note that this specific model lacks a built-in magnet, meaning it cannot support CMSG, DMSG, or EMSG position sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 10–40 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 MBLCJ40X40-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 MBLCJ40X40-30 Is Used
PCB Drill Press Indexing
Provides 628 N of push force to position multi-spindle PCB drilling heads, using the 10-40 mm adjustable window to fine-tune the plunge depth without mechanical spacers.
Stator Winding Tensioner
Regulates wire tension on electric motor stator winding machines, where the adjustable air cushion prevents sudden snatching that would snap the copper wire at high speeds.
Bottled Beverage Palletizer
Handles the 528 N pull load required to lift and lower light beverage crate layers, relying on the tunable cushion to prevent shock loads when decelerating a full case.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X40-30 the Right Cylinder?
Choose this 40 mm bore when you need 628 N of thrust at 0.5 MPa. If your payload is lighter, step down to the 32 mm bore (402 N push). If you need more power, step up to the 50 mm bore (981 N push). Select the MBLCJ over the MBLJ when your moving mass requires tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC if you need to trim the travel limits. The exact replacement match requires a 40 mm bore, 40 mm stroke, 30 mm adjust code, G1/4 port, PT thread, and Basic/FA/LB mounting. Remember that the rear adjuster is a travel stop, not a lock; the cushion only decelerates. Neither holds position pneumatically without live air, so use an external locking device if the load must be secured.
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 MBLCJ40X40-30 FAQ
At 0.5 MPa, this 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.
This specific SKU does not have a built-in magnet, so it cannot accept CMSG, DMSG, or EMSG position sensors. Additionally, the 30 mm rear adjuster is a travel stop that sets the 10-40 mm stroke window, and the adjustable air cushion only decelerates the piston; neither feature acts as a mechanical lock to hold a load in place.
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