Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-75
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-75 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 75mm for a usable window of 225–300mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke300 mm
- Adjustable225–300 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 MBLCJ20X300-75
The AirTAC MBLCJ20X300-75 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and tunable air cushions at both ends. It delivers 157 N push and 132 N pull at 0.5 MPa via a G1/8 port and Ø8 rod. The 75 mm rear adjuster creates a usable 225-300 mm travel window, ideal for varying end positions on long-stroke compact assemblies.
Unlike the base MBLJ with its fixed rubber bumper, this model uses screw-tunable deceleration to absorb kinetic energy at high speeds, protecting the end covers. The riveted rolling-packed barrel and grease-retaining piston seal maintain consistent friction. Note that this SKU lacks a built-in magnet, so it cannot accept CMSG, DMSG, or EMSG position sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-75 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-75 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 225–300 mm (trim 75 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 MBLCJ20X300-75
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ20X300-75 Is Used
PCB Router Z-Axis
Drives the vertical plunge of a printed circuit board mechanical router, using the 225-300 mm window to dial in depth while the air cushion absorbs rapid tool retraction.
Textile Yarn Guide
Traverses a yarn guide across a 300 mm winding drum, relying on the adjustable cushion to soften direction reversals and prevent thread snap on the lightweight 157 N carriage.
Foam Cutting Fence
Positions an extended 300 mm traveling fence on a foam slicing machine, trimming the rear 75 mm to match varied block widths without repositioning the whole fixture.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X300-75 the Right Cylinder?
With a 300 mm stroke and 157 N force, step down to the 32 mm bore (402 N push @0.5 MPa) if moving heavier payloads, or step up to the 25 mm bore (245 N push @0.5 MPa) for moderate loads. Choose this MBLCJ over the MBLJ when your cycle speed requires adjustable cushioning rather than a fixed bumper, or over the MBLC if you need the 225-300 mm travel flexibility.
The rear stopper sets the travel end but does not hold the load; the cushion only decelerates. Mounting is limited to Basic, FA, or LB (no SDB or back cover). Because the stroke is 300 mm on an Ø8 rod, use an external guide to prevent rod bending and side-load damage. Replacement match: 20 mm bore, 300 mm stroke, 75 mm adjust, G1/8 port, PT thread, no 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 MBLCJ20X300-75 FAQ
At 0.5 MPa it provides 157 N push and 132 N pull. At 0.7 MPa the push force is 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
The 75 mm rear adjuster mechanically trims the travel window down to 225 mm, acting as a physical stop. The adjustable air cushion only tunes end-of-stroke deceleration; neither mechanism locks or holds 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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