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)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
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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