Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-75
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-75 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 300mm nominal stroke and a rear adjustable-stroke stopper — trim up to 75mm for a usable window of 225–300mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke300 mm
- Adjustable225–300 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-75
The AirTAC MBLCJ25X300-75 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and a tunable air cushion at both ends. It delivers 245 N push and 206 N pull at 0.5 MPa. The rear stopper allows you to trim up to 75 mm of travel, creating a precise usable window of 225 to 300 mm for long-reach tasks. Unlike the fixed rubber bumper found on the base MBLJ, the screw-tunable cushion valves on this unit allow you to dial in end-of-stroke deceleration, protecting the aluminum end covers from impact during faster motions.
This SKU is built without a magnet (-S code omitted), meaning it cannot accept an AirTAC CMSG, DMSG, or EMSG position sensor. The Ø10 mm hard-chrome plated carbon-steel rod is driven by a heterogeneous two-way grease-retaining piston seal inside a riveted rolling-packed barrel. Because the stroke hits the 300 mm maximum standard limit for a 25 mm bore, the extended rod is highly susceptible to bending under lateral loads and requires an external guide to prevent premature seal wear.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-75 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-75 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 225–300 mm (trim 75 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 MBLCJ25X300-75
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ25X300-75 Is Used
PCB Edge Conveyor Routing
Drives a routing head across a 300 mm wide PCB conveyor. The 225-300 mm stroke window lets you dial in the exact cut path, while the air cushion prevents rod snap-back at the end of a fast traverse.
Dispenser Head Positioning
Positions an adhesive dispenser over varying carton widths. The 245 N push force securely moves the head, and the tunable cushion valves absorb the kinetic energy of the heavy aluminum bracket without jarring the fluid reservoir.
Thin-Film Web Guide
Actuates a guiding roller for packaging film. The 206 N pull force maintains tension, and the 75 mm rear adjustment lets operators fine-tune the roller's home position to correct web drift without re-mounting the cylinder.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-75 the Right Cylinder?
When sizing this actuator, consider stepping down to the 20 mm bore if your load requires less force—it yields 157 N push at 0.5 MPa and features a smaller Ø8 mm rod. If your application demands more thrust, the 32 mm bore provides 402 N push at 0.5 MPa via its larger G1/8 port. Choose this MBLCJ over the MBLJ when your moving mass or cycle speed requires active deceleration rather than a fixed bumper, or over the MBLC if your machine setup needs a variable end position rather than a fixed stroke.
For replacements, match the 25 mm bore, 300 mm stroke, 75 mm adjust code, G1/8 port, and default PT tapered thread. Mounting is limited to Basic, FA flange, or LB foot brackets—this series does not support SDB pivot or back-cover attachments. Remember that the rear adjuster is a travel stop and the cushion only decelerates; neither mechanism locks the load or holds position pneumatically, so external mechanical locking is required for static 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 MBLCJ25X300-75 FAQ
This 25 mm bore double-acting cylinder delivers 245 N push and 206 N pull at 0.5 MPa, 343 N push at 0.7 MPa, and a maximum theoretical force of 50 kgf at 1.0 MPa. The 300 mm stroke is the maximum standard length available for this bore size.
No. This specific model lacks the -S code, meaning no internal magnet is fitted. It cannot accept AirTAC CMSG reed or DMSG/EMSG electronic sensors. You must choose an MBLCJ model with the -S suffix for position detection.
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