Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 75mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 55–75mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke75 mm
- Adjustable55–75 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-20
The AirTAC MBLCJ20X75-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a screw-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 adjuster allows you to trim up to 20 mm of travel, creating a usable stroke window of 55 to 75 mm. This specific SKU lacks a built-in magnet, meaning it cannot support CMSG, DMSG, or EMSG position sensors.
Distinguish the adjustable stroke from the cushion: the rear stopper sets the end position, while the cushion screws tune end-of-stroke deceleration to protect the covers. Neither mechanism locks the load. The riveted rolling-packed barrel and grease-retaining two-way piston seal manage friction well, while the Ø8 mm carbon-steel rod features 20 µm hard-chrome plating for wear resistance.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 75 mm |
| Adjustable window | 55–75 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 MBLCJ20X75-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 MBLCJ20X75-20 Is Used
PCB Depaneling Router
Provides 157 N of push force to plunge a router bit into assembled PCB panels, using the 55-75 mm stroke window to dial in the exact cutting depth.
Micro-Clamp Actuator
Tunes the end-of-stroke air cushion to softly decelerate a delicate electronic component clamp, preventing impact damage during the 75 mm travel.
Label Applicator Arm
Extends and retracts a label wipe-down brush across a packaging line, relying on the hard-chrome plated 8 mm rod for smooth, low-friction cycling.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X75-20 the Right Cylinder?
Stepping down to the 20 mm bore is appropriate when your payload requires less than the 132 N pull force this model provides; conversely, moving up to the 25 mm bore yields 206 N of pull force for heavier payloads. Choose this MBLCJ over the MBLJ for tunable deceleration instead of a fixed rubber bumper, or over the MBLC when you need that rear travel stopper. The adjuster and cushion only manage motion, so use an external locking device for static load holding.
Mounting is limited to Basic, FA (flange), or LB (foot); there is no SDB pivot or back-cover option. The G1/8 port uses a PT (tapered) thread. For exact replacements, match the 20 mm bore, 75 mm stroke, 20 mm adjust code, PT thread, and confirm no magnet (-S) is required. With a 75 mm stroke, the 8 mm rod is manageable, but always guide side loads externally to prevent rod bending.
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 MBLCJ20X75-20 FAQ
This 20 mm bore cylinder delivers 157 N push and 132 N pull at 0.5 MPa, 220 N push at 0.7 MPa, and a maximum theoretical output of 32 kgf at 1.0 MPa.
The rear adjuster is a travel stop that trims the stroke window to 55-75 mm, while the air cushion screw tunes end-of-stroke deceleration. Neither holds the load; use an external lock for static positioning.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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Related AirTAC Adjustable-Stroke Cylinders
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