Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 30mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 0–30mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke30 mm
- Adjustable0–30 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 MBLCJ20X30-30
The AirTAC MBLCJ20X30-30 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It uses an 8mm rod and a G1/8 port, delivering 157N push and 132N pull at 0.5 MPa. The rear stopper trims up to 30mm of travel, yielding a usable stroke window of 0-30mm for exact endpoint positioning.
Unlike the fixed rubber bumper found on the base MBLJ, the screw-tunable air cushions on this unit allow you to regulate end-of-stroke deceleration, absorbing impact energy to protect the end covers during faster cycles. The riveted rolling-packed barrel and grease-retaining piston seal maintain integrity in tight spaces. Because this specific SKU lacks the -S magnet code, it cannot accept a CMSG, DMSG, or EMSG position sensor.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 30 mm |
| Adjustable window | 0–30 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 MBLCJ20X30-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×30 | 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 MBLCJ20X30-30 Is Used
Micro-clip insertion
Drives a 30mm insertion stroke for micro-clips in consumer electronics assembly, using the 0-30mm adjustable window to dial in exact depth without reprogramming the PLC.
PCB probe contact
Applies 157N of push force to lower a testing probe onto a printed circuit board, relying on the adjustable air cushion to prevent harsh impact on the delicate contacts.
Small-part reject gate
Pushes defective surface-mount components off a conveyor line, retracting into a compact riveted aluminum body that fits within tight machine guard clearances.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X30-30 the Right Cylinder?
Stepping down to the 12mm bore class would reduce your output significantly, while moving up to a 25mm bore increases push force to 245N at 0.5 MPa if your payload requires more thrust. Choose this MBLCJ over the MBLJ when your application demands tunable end-cushioning rather than a fixed bumper, or over the MBLC when you need that rear travel stopper to trim the 0-30mm window.
Remember that the rear adjuster acts only as a mechanical travel stop, and the cushion solely decelerates the load; neither function mechanically locks or holds the rod position without live air pressure. Mounting is limited to Basic, FA flange, or LB foot styles (no SDB or back-cover options), extending the overall length to A + 2 x stroke + adjust. For an exact replacement, match the 20mm bore, 30mm nominal stroke, 30mm adjust code, G1/8 port, PT thread form, 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 MBLCJ20X30-30 FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N of push force and 132N of pull force. At 0.7 MPa, the push force increases to 220N. The maximum theoretical force is 32 kgf when operated at the 1.0 MPa pressure limit.
The rear adjuster physically stops the piston to trim the travel window down to 0-30mm, acting as a mechanical end-stop. The adjustable air cushion only regulates the speed of deceleration near the stroke end to soften impact; neither component locks or holds the load in place without continuous air pressure.
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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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