Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30S 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 30mm for a usable window of 50–80mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke80 mm
- Adjustable50–80 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30S
The AirTAC MBLCJ20X80-30S is a compact double-acting aluminum mini cylinder featuring a rear adjustable stroke and an adjustable air cushion at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa. The integrated -S magnet enables position detection. With an 80 mm stroke and a 30 mm rear adjustment, the usable travel window spans 50 to 80 mm.
This model uses an 8 mm hard-chrome plated carbon-steel rod and a G1/8 port. The riveted rolling-packed barrel and grease-retaining piston seal ensure long service life. The adjustable air cushion allows you to screw-tune the end-of-stroke deceleration to protect the end covers during faster moves, distinguishing it from the fixed rubber bumper found on the MBLJ series.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 80 mm |
| Adjustable window | 50–80 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 MBLCJ20X80-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×80 | 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 MBLCJ20X80-30S Is Used
PCB Pick-and-Place
Provides 157 N of push force for placing surface-mount components on printed circuit boards, using the 50-80 mm travel window to precisely tune the descent height.
Dispenser Valve Actuation
Screw-tunes the dual air cushions to smoothly start and stop a 80 mm stroke for adhesive dispensing heads, preventing fluid splashing at the end of travel.
Small Parts Ejection
Uses the integrated magnet with a DMSG electronic sensor to confirm ejection of small molded plastic parts from a press before the mold closes.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X80-30S the Right Cylinder?
If you need less force, the neighboring 12 mm bore class is too small for this frame, but stepping up to a 25 mm bore provides 245 N of push force at 0.5 MPa. Choose this 20 mm bore when a compact footprint is required for lighter loads. The MBLCJ provides tunable end-cushioning, whereas the MBLJ relies on a fixed bumper, and the MBLC offers a fixed stroke. The rear adjuster sets the travel end, while the cushion decelerates the piston; neither component locks or holds the load in place without live air pressure. Mounting is limited to Basic, FA, or LB styles, as there is no back-cover or SDB pivot option. The exact replacement match is a 20 mm bore, 80 mm stroke, 30 mm adjust code, G1/8 PT thread, with a built-in 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 MBLCJ20X80-30S 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 is 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa. The speed range is 30-800 mm/s.
The adjustable stroke uses a rear stopper to mechanically trim the travel down from 80 mm to a 50 mm minimum window. The adjustable air cushion uses a needle screw to tune the end-of-stroke deceleration rate. Neither feature acts as a lock or brake to hold the load without 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 usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
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