Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-40 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 50mm nominal stroke and a rear adjustable-stroke stopper — trim up to 40mm for a usable window of 10–50mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke50 mm
- Adjustable10–50 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-40
The AirTAC MBLCJ20X50-40 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. The 40 mm adjustment code lets you trim the rear travel, creating a usable stroke window of 10 to 50 mm for precise end-position tuning.
Unlike the fixed rubber bumper found on the base MBLJ, the screw-tunable cushion on this unit allows you to dial in end-of-stroke deceleration for faster, heavier moves while protecting the end covers. The riveted rolling-packed barrel and 20 um hard-chrome plated carbon-steel rod withstand demanding cycles. This specific SKU lacks the -S magnet, meaning it cannot accept a CMSG or DMSG position sensor.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-40 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 10–50 mm (trim 40 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 300 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 MBLCJ20X50-40
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | 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 MBLCJ20X50-40 Is Used
PCB Depaneling Saw Feed
Drives a small linear blade carriage on an electronics depaneling router, using the 10-50 mm stroke window to set exact cut depth while the air cushion prevents impact bounce.
Micro-Dispense Valve Actuation
Toggles a metering valve on a adhesive dispensing manifold, relying on the 157 N push force to open stiff seats and the tunable cushion to avoid liquid hammer.
Wire Cutter Anvil Stop
Acts as an adjustable anvil stopper on a fine wire cutting machine, trimming 40 mm off the 50 mm stroke to perfectly time the shear against the feed rollers.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-40 the Right Cylinder?
With a 157 N push force at 0.5 MPa, stepping down to a 12 mm bore reduces output significantly, while stepping up to a 25 mm bore yields 245 N of push force. Choose the MBLCJ over the MBLJ when your payload or cycle speed demands adjustable pneumatic deceleration rather than a fixed bumper. If your stroke length never changes, the MBLC variant offers fixed travel with the same cushioning.
Remember that the rear adjuster is a travel stop, not a mechanical lock, and the air cushion only decelerates; neither holds a load in place without live air pressure. Mounting is limited to Basic, FA flange, or LB foot styles, as the MBLCJ series does not support SDB pivots or back-cover options. To replace this exact unit, match the 20 mm bore, 50 mm stroke, 40 mm adjust code, G1/8 port, PT thread, and confirm no magnet is required.
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 MBLCJ20X50-40 FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push force reaches 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
No, this specific SKU lacks the -S code, meaning no built-in magnet is fitted. To use AirTAC CMSG reed or DMSG solid-state sensors, you must select an MBLCJ variant with the -S suffix. Also, note the rear adjuster sets the travel end position but does not hold the load mechanically.
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