Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 300mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 280–300mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke300 mm
- Adjustable280–300 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 MBLCJ20X300-20
The AirTAC MBLCJ20X300-20 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 rear stopper allows you to trim up to 20 mm of travel, providing a usable stroke window of 280 to 300 mm. This specific configuration omits the built-in magnet, meaning it cannot accept CMSG, DMSG, or EMSG position sensors.
Distinguishing the two adjustment mechanisms is key: the rear screw acts as a mechanical travel stop to set the exact end position, while the needle valves tune end-of-stroke deceleration. The cushion absorbs kinetic energy to protect the end covers during high-speed moves, but neither feature mechanically locks or holds the load in place. The riveted rolling-packed barrel and 20 µm hard-chrome plated carbon-steel rod ensure durable service in tight spaces.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 280–300 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 MBLCJ20X300-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×300 | 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 MBLCJ20X300-20 Is Used
PCB Edge Belt Sanding
Drives a fine-grit sanding block along a 300 mm path to deburr printed circuit board edges. The tunable air cushion gently decelerates the 157 N push force, preventing impact marks on delicate fiberglass substrates.
Textile Loom Thread Guide
Positions a ceramic yarn guide across a 280 to 300 mm adjustable window. The rear stopper sets the exact crossing pitch, while the riveted aluminum barrel withstands the humid, lint-filled weaving environment.
Light-Duty Film Roll Tensioner
Tracks a dancer bar on a packaging film unwind stand. The 132 N pull force at 0.5 MPa maintains consistent web tension, and the needle valves allow precise speed tuning as the lightweight roll winds down.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-20 the Right Cylinder?
Stepping down from this 20 mm bore (157 N push at 0.5 MPa) to the smaller sibling is not an option as it is the smallest available frame; if your application requires less force, you must look outside the MBLCJ family. If you need greater thrust, the 25 mm bore provides 245 N of push force at 0.5 MPa. Compared to the MBLJ variant, this MBLCJ model uses adjustable air cushions instead of fixed rubber bumpers, making it vastly superior for damping heavy loads at high speeds.
When ordering a replacement, verify the 20 mm bore, 300 mm stroke, 20 mm adjust code, G1/8 port, PT thread form, and the absence of the -S magnet. Because this stroke reaches the 300 mm maximum limit for a 20 mm bore, the 8 mm rod is highly susceptible to side-load bending; an external guide rail is strongly recommended to prevent premature seal failure. Mounting is limited to Basic, FA flange, or LB foot brackets—SDB pivot and back-cover configurations are not available.
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 MBLCJ20X300-20 FAQ
This 20 mm bore cylinder delivers a push force of 157 N and a pull force of 132 N at 0.5 MPa. At 0.7 MPa, the push force is 220 N, with a theoretical maximum of 32 kgf at 1.0 MPa. The 300 mm stroke is the absolute maximum standard limit for this bore size.
No. The rear stroke adjuster is a travel stop that sets the end position within a 280 to 300 mm window, and the adjustable air cushion only decelerates the piston near the covers. Neither mechanism mechanically locks the rod; live air pressure or an external locking device is required to hold a load.
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.
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