Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50 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 50mm for a usable window of 0–50mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke50 mm
- Adjustable0–50 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50
The AirTAC MBLCJ20X50-50 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a screw-tunable air cushion at both ends. With a 20mm bore, it delivers 157N push and 132N pull at 0.5 MPa. The 50mm adjustable code matches the 50mm nominal stroke, creating a usable 0-50mm travel window. This allows you to precisely dial in the end position anywhere within the full stroke without mechanical stops.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model's adjustable cushion lets you tune end-of-stroke deceleration for faster cycle speeds while protecting the end covers. The riveted rolling-packed barrel and heterogeneous grease-retaining piston seal maintain consistent lubrication. Note that this specific SKU lacks a built-in magnet, so it cannot support CMSG, DMSG, or EMSG position sensors. The Ø8mm hard-chrome plated carbon-steel rod resists corrosion but is slender, making it best suited for light loads without heavy side forces.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 0–50 mm (trim 50 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 MBLCJ20X50-50
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | Nominal stroke length in mm. |
| -50 | 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 MBLCJ20X50-50 Is Used
PCB Pick & Place
Dialing the stroke down to 15mm via the rear adjuster provides exact vertical travel for a pick-and-place head placing surface-mount components, while the tuned cushion prevents end-bounce at high speed.
Micro-Dispense Valve
The 157N push force securely strokes a precision adhesive dispensing valve; the adjustable air cushion catches the rod at the exact end position to avoid splashing viscous epoxy.
Thin Sheet Feeder
Operating within the 0-50mm window, this cylinder separates single sheets in a small packaging feeder, using the tunable cushion to protect the aluminum covers from repeated impact.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-50 the Right Cylinder?
At 157N push force (0.5 MPa), this 20mm bore is the smallest available. If you need less force, you must step outside the MBLCJ family, but if you need more, stepping up to the 25mm bore yields 245N. Choose the MBLCJ over the MBLJ when your moving mass or cycle speed requires tunable end-cushioning rather than a fixed bumper. Choose the MBLC instead if you need a fixed stroke without a rear adjuster. Remember the rear stopper sets travel length and the cushion only decelerates; neither holds the load. Drift occurs without live air, so use an external lock for position holding. Mounting is limited to Basic, FA, or LB; no SDB or back-cover options exist. To replace this cylinder, match the 20mm bore, 50mm stroke, 50mm adjust, G1/8 port, PT thread, and confirm no magnet is fitted.
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 MBLCJ20X50-50 FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N push and 132N pull. At 0.7 MPa, push increases to 220N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The 50mm adjuster lets you trim the rear travel stop down to a 0-50mm usable window. This sets the physical end position. It is distinct from the adjustable air cushion, which only controls deceleration speed. Neither the stopper nor the cushion acts as a lock to hold a load without air pressure.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Adjustable-Stroke Cylinders
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