Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40 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 40mm for a usable window of 40–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable40–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40
The AirTAC MBLCJ20X80-40 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 push and 132 N pull force at 0.5 MPa. The rear stopper allows you to trim up to 40 mm of travel, creating a usable end-position window of 40 to 80 mm for precise machinery timing. A riveted rolling-packed barrel and a 20 um hard-chrome plated carbon-steel rod handle speeds up to 800 mm/s.
This SKU lacks the -S code, meaning no built-in magnet is fitted and it cannot host a CMSG or DMSG position sensor. The adjustable cushioning uses screw-tunable deceleration to protect the end covers from impact during high-frequency moves, unlike the fixed rubber bumper found on the base MBLJ series. Remember that the rear adjuster is a travel stop, not a mechanical lock; it sets the end point but cannot hold a load in place without live air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 40–80 mm (trim 40 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 MBLCJ20X80-40
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | Nominal stroke length in mm. |
| -40 | 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 MBLCJ20X80-40 Is Used
PCB Drill Press Feeder
Drives a small linear shuttle pushing raw FR4 boards into the drilling station, using the 40-80 mm stroke window to time the feed precisely against the drill cycle.
Micro-Dispense Valve Actuation
Actuates a metering valve for two-part epoxy, relying on the adjustable air cushion to prevent fluid splashing by decelerating the 8 mm rod before the end cover strike.
Textile Yarn Guide
Shifts a delicate yarn guide across a weaving head; the 157 N push force is sufficient for the low-friction movement, while the rear stopper dials in the exact crossover point.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40 the Right Cylinder?
For lighter or heavier tasks, size up or down: the MBLCJ25X80-40 provides 245 N push at 0.5 MPa, while the smaller MBLCJ16 bore offers lower force. Choose this MBLCJ variant over the MBLJ when your application requires tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC when you need to fine-tune the travel distance. The rear adjuster and the air cushion manage movement and impact, but neither acts as a locking mechanism; use an external guide or lock for position holding. Mounting is limited to Basic, FA flange, or LB foot styles; this series does not support SDB pivot or back-cover options. To replace this unit, match the 20 mm bore, 80 mm stroke, 40 mm adjust code, G1/8 port, PT thread, and confirm no magnet is required.
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 MBLCJ20X80-40 FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N push and 132 N pull force. At 0.7 MPa, the push increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
This specific SKU lacks the -S code, so it has no built-in magnet and cannot accept a CMSG or DMSG position sensor. The 40 mm adjustment is a rear travel stopper that sets the end position within a 40-80 mm window; it is not a lock. The separate adjustable air cushion tunes the end-of-stroke deceleration to protect the covers.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Adjustable-Stroke Cylinders
Request a Quote for Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-40
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.