Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X30-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X30-20S is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 30mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 10–30mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke30 mm
- Adjustable10–30 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X30-20S
The AirTAC MBLCJ25X30-20S is a compact double-acting mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. It delivers 245 N push and 206 N pull force at 0.5 MPa. The rear stopper allows you to trim up to 20 mm of travel, creating a precise usable stroke window of 10 to 30 mm. This makes it highly effective for applications requiring exact end-position tuning rather than a fixed length of travel.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air deceleration to protect the end covers and smooth out heavier, faster moves. The built-in magnet (-S) enables position detection using AirTAC CMSG reed or DMSG/EMSG electronic switches. The riveted aluminum barrel and 20 µm hard-chrome plated Ø10 mm carbon-steel rod ensure durability, while the grease-retaining two-way piston seal maintains lubrication over a 30-800 mm/s speed range.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X30-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X30-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 30 mm |
| Adjustable window | 10–30 mm (trim 20 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M10×1.25 |
| 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 (Ø25mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 245 N | 206 N |
| 0.7 MPa | 344 N | — |
| Max (@1.0 MPa) | 50 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 MBLCJ25X30-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×30 | 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 MBLCJ25X30-20S Is Used
PCB Depanelling Router
Provides exact 10-30 mm trim routing pressure for cutting individual circuit boards from a panel without cracking the substrate.
Label Applicator Tamp
Fine-tunes the tamp stroke down to 10 mm to press adhesive labels onto small pharmaceutical vials with precise, cushioned contact.
Small Part Ejector
Ejects machined plastic fittings from a mold cavity, using the adjustable air cushion to prevent the lightweight parts from launching.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X30-20S the Right Cylinder?
Choose this 25 mm bore when you need 245 N of push force at 0.5 MPa. If your task requires less force, stepping down to the 20 mm bore yields 157 N; if you need more power, stepping up to the 32 mm bore provides 402 N. Select the MBLCJ over the MBLJ when your cycle speeds demand tunable end-of-stroke deceleration rather than a fixed bumper, or choose the MBLC if you prefer a fixed stroke without the rear adjuster.
When replacing this unit, match the 25 mm bore, 30 mm stroke, 20 mm adjust code, G1/8 PT thread, and the -S magnet. Mounting is limited to Basic, FA flange, or LB foot options; there is no SDB pivot or back-cover configuration available. Remember that the rear adjuster is a travel stop, and the air cushion only decelerates; neither holds the load, so an external guide or lock is required for position holding.
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 MBLCJ25X30-20S FAQ
At 0.5 MPa, this 25 mm bore cylinder provides 245 N push and 206 N pull force. At 0.7 MPa, the push force is 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa. Operating pressure ranges from 0.15 to 1.0 MPa.
The adjustable stroke uses a rear stopper to mechanically limit the travel window to 10-30 mm; it acts as a hard stop, not a lock. The adjustable air cushion uses a screw to tune end-of-stroke deceleration, absorbing kinetic energy to protect the end covers. Neither feature holds the load in place without live air pressure.
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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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Most inquiries answered within 7-8 hours.
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