Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-10S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-10S is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 80mm nominal stroke and a rear adjustable-stroke stopper — trim up to 10mm for a usable window of 70–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable70–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-10S
The AirTAC MBLCJ20X80-10S is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. The rear stopper allows you to trim up to 10 mm of travel, creating a usable stroke window of 70-80 mm. Driven by an 8 mm rod through a G1/8 port, it delivers 157 N of push force and 132 N of pull force at 0.5 MPa. This 80 mm stroke length is well-suited for short indexing tasks on dense packaging machinery.
Unlike the base MBLJ which relies on a fixed rubber bumper, this MBLCJ variant uses screw-tunable air cushions to decelerate the piston near each end-cap, absorbing kinetic energy to prevent cover damage during faster cycles. The riveted rolling-packed aluminum barrel houses a heterogeneous two-way grease-retaining piston seal, maintaining lubrication over the 30-800 mm/s speed range. The 20 um hard-chrome plating on the carbon-steel rod provides wear resistance, while the built-in magnet enables position detection via CMSG reed or DMSG/EMSG solid-state switches. Remember that the rear adjuster is a travel stop, not a lock; it sets the end position but cannot hold a load under external force.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-10S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-10S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 70–80 mm (trim 10 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 MBLCJ20X80-10S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Nominal stroke length in mm. |
| -10 | 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 MBLCJ20X80-10S Is Used
Pouch Sealing Jaws
Drives the sealing jaws on a continuous vertical form-fill-seal machine, using the 70-80 mm stroke window to precisely time the crimp against the packaging film with 157 N of force.
PCB Shuttle Indexer
Positions a printed circuit board shuttle at 80 mm travel, relying on the adjustable air cushion to soften end-of-stroke impacts and protect delicate solder joints during high-speed transfer.
Micro-filter Cartridge Loader
Pushes a spun-filter cartridge into a housing on an automated assembly line, using the tunable rear stopper to dial in the exact 75 mm insertion depth without overstressing the filter media.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-10S the Right Cylinder?
If you need to step down for a lighter task, the 20 mm bore is the smallest available in this series, so you would look outside the family for a smaller body. To step up, the 25 mm bore offers 245 N of push force at 0.5 MPa, providing a noticeable jump in thrust for heavier friction loads. Choose the MBLCJ over the MBLJ when your cycle speeds demand tunable deceleration rather than a fixed bumper, or over the MBLC when you need that rear travel stopper to fine-tune the end position. Neither the cushion needle nor the rear stopper will mechanically lock the rod in place; live air is required to hold position, so use an external lock for safety. Mounting is limited to Basic, FA flange, or LB foot brackets, as there is no SDB pivot or back-cover option. The overall length extends by the 10 mm adjuster plus twice the stroke. For an exact replacement, match the 20 mm bore, 80 mm stroke, 10 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 MBLCJ20X80-10S 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 0.15-1.0 MPa.
The rear stroke adjuster is a mechanical travel stop that lets you trim up to 10 mm off the 80 mm stroke, creating a 70-80 mm usable window. The adjustable air cushion is a needle valve that tunes the exhaust flow to decelerate the piston near the end-caps. Neither holds the load in place; they only set travel limits and manage stopping speed.
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