Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20S 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 20mm for a usable window of 30–50mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke50 mm
- Adjustable30–50 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 MBLCJ20X50-20S
The AirTAC MBLCJ20X50-20S 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 built-in magnet (-S) supports CMSG reed and DMSG/EMSG electronic sensors for precise position detection. With a 50 mm nominal stroke, the rear adjuster trims up to 20 mm of travel, creating a usable end-position window of 30 to 50 mm.
Unlike the standard MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air cushions to decelerate loads smoothly at each end cover, preventing impact damage. The riveted rolling-packed aluminum barrel and 20 um hard-chrome plated carbon-steel rod ensure durability. Remember, the rear stopper sets the travel end and the cushion only decelerates; neither component mechanically locks or holds the load in place without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 50 mm |
| Adjustable window | 30–50 mm (trim 20 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 MBLCJ20X50-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×50 | Nominal stroke length in mm. |
| -20 | 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 MBLCJ20X50-20S Is Used
PCB Router Z-Axis
Provides 157 N of push at 0.5 MPa to plunge a lightweight spindle, using the 30-50 mm adjustable window to set exact cutting depth limits on custom PCB routing machines.
Micro-Clamp Deceleration
Tunes the end-of-stroke air cushion to softly stop a high-speed clamping jaw, preventing impact damage to delicate electronic components during assembly.
Sensor-Verified Ejection
Uses the built-in magnet with a DMSG solid-state switch to confirm retraction before a pick-and-place nozzle cycles, ensuring the 8 mm rod clears the work area.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X50-20S the Right Cylinder?
If your application requires less force, stepping down is not an option below 20 mm, making this the most compact choice. If you need more power, the next size up is the 25 mm bore, which provides 245 N of push force at 0.5 MPa. Choose the MBLCJ over the MBLJ when your cycle speeds or moving masses require tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC if you need on-the-fly stroke trimming. Mounting is limited to Basic, FA flange, or LB foot styles; no SDB pivot or back-cover options exist. For an exact replacement, match the 20 mm bore, 50 mm stroke, 20 mm adjust code, G1/8 port, PT thread, and the -S magnet.
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 MBLCJ20X50-20S 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 increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa, with an operating pressure range of 0.15 to 1.0 MPa.
The adjustable stroke uses a rear stopper to mechanically trim the travel end, giving you a usable stroke window of 30 to 50 mm. The adjustable air cushion uses a screw to tune pneumatic deceleration near the end covers to absorb kinetic energy. Neither the stopper nor the cushion acts as a lock to hold the load in place.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Adjustable-Stroke Cylinders
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