Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20S 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 20mm for a usable window of 280–300mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke300 mm
- Adjustable280–300 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- 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 MBLCJ25X300-20S
The AirTAC MBLCJ25X300-20S is a compact double-acting aluminum mini cylinder featuring a rear stroke stopper and twin adjustable air cushions. It delivers 245 N push and 206 N pull at 0.5 MPa. The 20 mm rear adjuster creates a 280-300 mm usable travel window, ideal for fine-tuning the end position on long-travel packaging machinery.
Unlike the fixed rubber bumper on an MBLJ, the screw-tunable cushions decelerate the rod at both ends to absorb kinetic energy from fast 300 mm moves. The riveted aluminum barrel and 20 µm hard-chrome plated Ø10 mm carbon-steel rod withstand wear. The built-in -S magnet supports CMSG reed and DMSG/EMSG solid-state sensors for position feedback. Remember, the rear stopper sets travel length and the cushion governs deceleration; neither holds a load statically without live air.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 280–300 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 MBLCJ25X300-20S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×300 | 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 MBLCJ25X300-20S Is Used
Flow-Wrap Carton Sealing
Tunes the 280-300 mm push stroke to precisely drive the sealing jaw on continuous flow-wrap packaging lines, using the twin cushions to arrest the 245 N thrust smoothly.
Textile Beam Indexing
Shifts heavy fabric beams along a 300 mm track; the adjustable rear stopper dials in the exact cut-off point while the air cushion softens the high-speed rod impact.
PCB Conveyor Sorting
Uses the -S magnet with DMSG electronic switches to confirm actuator position when rejecting populated PCBs off a 300 mm transfer lane at 0.5 MPa.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-20S the Right Cylinder?
At 245 N push (0.5 MPa), this 25 mm bore suits medium-duty actuation. If you need less force, step down to the 20 mm bore (157 N push); for heavier loads, step up to the 32 mm bore (402 N push). Choose this MBLCJ over an MBLJ when you need tunable end-deceleration to protect end covers from high-impact cycling, or over an MBLC when your machine requires a variable 280-300 mm end-point.
Because the 300 mm stroke hits the maximum standard limit for a 25 mm bore, the small Ø10 mm rod is highly susceptible to side-load bending; an external guide rail is mandatory. Mounting is limited to Basic, FA flange, or LB foot (no SDB pivot or back-cover). For a drop-in replacement, match the 25 mm bore, 300 mm stroke, 20 mm adjust code, G1/8 PT port, and the -S magnet. The adjuster and cushions are not brakes—they will not hold position if air pressure drops.
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 MBLCJ25X300-20S FAQ
At 0.5 MPa it provides 245 N push and 206 N pull. At 0.7 MPa the push increases to 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa.
The 20 mm rear adjuster is a mechanical travel stop that sets your usable stroke window between 280-300 mm. The adjustable air cushion is a screw valve that regulates exhaust flow to decelerate the piston near the end covers. Neither component is a lock; they cannot hold a load statically without continuous 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 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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