Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-30 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 30mm for a usable window of 270–300mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke300 mm
- Adjustable270–300 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 MBLCJ20X300-30
The AirTAC MBLCJ20X300-30 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and tunable air cushions at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. The 30 mm rear stopper creates a usable travel window of 270 to 300 mm, letting you fine-tune the end position without mechanical shims. Because this specific SKU lacks a built-in magnet, it cannot support CMSG, DMSG, or EMSG position sensors.
Equipped with a G1/8 port and an Ø8 mm hard-chrome plated carbon steel rod, this unit is designed for demanding deceleration. The screw-tunable end cushions absorb kinetic energy at the stroke limits, protecting the riveted aluminum end covers from impact damage—a significant upgrade over the fixed rubber bumpers found on the base MBLJ series. Note that the rear adjuster acts strictly as a travel stop and does not lock the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 270–300 mm (trim 30 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 MBLCJ20X300-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -30 | 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 MBLCJ20X300-30 Is Used
PCB Edge Routing Trimmer
Deploys the 270-300 mm stroke to reach deep into a routing bay, using the tunable air cushion to decelerate the 157 N push force before it stresses the lightweight aluminum frame.
Micro-Clamp Actuator
Uses the 30 mm rear stroke adjustment to dial in the exact clamping depth on delicate electronic connectors, preventing crush damage without needing custom spacers.
Thin Film Web Guide
Extends across a 300 mm span to shift a web guide roller, relying on the adjustable end cushions to prevent sudden jerks that would tear the tensioned polymer film.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-30 the Right Cylinder?
Choose this 20 mm bore when you need precise positioning within a 270 to 300 mm window and moderate force (157 N push at 0.5 MPa). If your application requires less travel or lower inertia, stepping down to the 12 mm bore series provides a smaller footprint. Conversely, if you need to move heavier payloads, stepping up to the 25 mm bore increases thrust to 245 N at 0.5 MPa.
Select the MBLCJ over the MBLJ when your moving mass demands active deceleration rather than a passive rubber bumper. Remember that neither the adjustable cushion nor the rear stopper functions as a mechanical lock; external guide rails must support side loads, especially at this 300 mm extended length. Mounting is limited to Basic, FA flange, or LB foot styles—SDB pivot or back-cover options are not available. For exact replacements, verify the 20 mm bore, 300 mm stroke, 30 mm adjust code, PT thread, and the absence of the S magnet code.
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 MBLCJ20X300-30 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, with a maximum theoretical output of 32 kgf at 1.0 MPa. The 30 mm rear adjuster allows you to set the actual travel anywhere within a 270 to 300 mm window.
This specific SKU does not have a built-in magnet, so it cannot accept CMSG, DMSG, or EMSG position switches. Additionally, the adjustable air cushion only regulates end-of-stroke deceleration and the rear adjuster acts as a travel stop; neither component functions as a lock to hold a load in place without continuous 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 are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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