Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 250mm nominal stroke and a rear adjustable-stroke stopper — trim up to 75mm for a usable window of 175–250mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke250 mm
- Adjustable175–250 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75
The AirTAC MBLCJ40X250-75 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 push and 528 N pull force at 0.5 MPa. The 75 mm rear adjuster creates a usable stroke window of 175 to 250 mm, letting you fine-tune the end position without moving the cylinder mounts. The tunable air cushion uses screw-needle valves to decelerate heavy 250 mm moves, preventing end-cover impact that a fixed bumper cannot absorb. This cylinder lacks a built-in magnet, so it cannot accept CMSG, DMSG, or EMSG position sensors. Its riveted rolling-packed barrel and 20 µm hard-chrome plated carbon-steel rod provide durable service in tight spaces.
The rear adjuster sets the travel end but is a mechanical stop, not a lock; it will not hold a load without live air pressure. With a 250 mm stroke, the 16 mm rod is susceptible to side-load bending, so external guide rails should support the payload. Mounting is limited to Basic, FA flange, or LB foot brackets; no SDB pivot or back-cover options exist. The standard PT thread and G1/4 porting match common pneumatic infrastructure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 250 mm |
| Adjustable window | 175–250 mm (trim 75 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 MBLCJ40X250-75
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×250 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ40X250-75 Is Used
Textile Loom Beater
Tunes the 175-250 mm stroke window to time the reed motion precisely, while the adjustable air cushion absorbs the 628 N kinetic impact at the weave cycle end.
Pallet Diverter Gate
Handles heavy routing loads with 880 N at 0.7 MPa, using the rear stopper to set the exact gate open position without relying on a lock mechanism.
Industrial Dough Mixer
Extends 250 mm to actuate the tilting drum, relying on the riveted aluminum barrel and hard-chrome rod to withstand abrasive flour dust in tight machine frames.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X250-75 the Right Cylinder?
Choose the 40 mm bore for 628 N push force at 0.5 MPa. If your load is lighter, step down to the 32 mm bore (402 N push); for heavier loads, step up to the 50 mm bore (981 N push). The MBLCJ differs from the MBLJ by offering tunable air cushioning instead of a fixed rubber bumper, making it better for high kinetic energy. Unlike the MBLC (fixed stroke), this model lets you trim the rear position by up to 75 mm. Remember, the cushion only decelerates and the adjuster is a travel stop; neither holds position pneumatically. For a drop-in replacement, match the 40 mm bore, 250 mm stroke, 75 mm adjust code, G1/4 port, PT thread, and Basic mounting. Because this SKU lacks the -S magnet code, position sensing is unavailable without changing the cylinder.
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 MBLCJ40X250-75 FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At 0.7 MPa, the push force is 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa.
The 75 mm adjustable stroke is a rear mechanical stopper that sets the travel end within a 175 to 250 mm window; it does not lock or hold the load. The adjustable air cushion is a screw-tunable valve that decelerates the piston near the stroke ends to protect the end covers. Neither feature holds position without live air pressure.
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Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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