Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50 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 50mm for a usable window of 250–300mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke300 mm
- Adjustable250–300 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50
The AirTAC MBLCJ25X300-50 is a compact double-acting aluminum mini cylinder engineered for demanding 300 mm travel applications. It integrates a rear travel stopper allowing you to trim up to 50 mm, yielding a usable stroke window of 250-300 mm. Delivering 245 N push and 206 N pull force at 0.5 MPa, it is paired with an adjustable air cushion at both ends to tune deceleration for heavier moving loads. This PT-threaded unit features a Ø10 mm carbon-steel rod with 20 µm hard-chrome plating and a grease-retaining two-way piston seal.
Because this specific SKU lacks the -S suffix, it has no internal magnet and cannot host CMSG, DMSG, or EMSG position sensors. The riveted rolling-packed barrel keeps the body compact for tight machine spaces, while the end cushions absorb kinetic energy to protect the covers. The rear adjuster sets the end position but does not lock the load; external guidance is required for this long stroke.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 300 mm |
| Adjustable window | 250–300 mm (trim 50 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 MBLCJ25X300-50
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×300 | Nominal stroke length in mm. |
| -50 | 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 MBLCJ25X300-50 Is Used
PCB Edge Conveyor Transfer
Drives the extend stage of a 300 mm transfer arm in PCB routing machines, using the 250-300 mm window to dial in exact handoff position while the air cushion halts the 245 N thrust smoothly.
Dispenser Head Positioning
Adjusts the shot pin height on an adhesive dispenser, relying on the 50 mm rear stopper to trim the 300 mm stroke down to 250 mm for varied syringe clearance without re-mounting.
Film Cutter Feed
Feeds a cutting blade on a packaging line where the tunable cushion absorbs the kinetic energy of the 300 mm traverse, protecting the end covers from impact at cycle end.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X300-50 the Right Cylinder?
For 300 mm travel, this 25 mm bore generates 245 N push at 0.5 MPa. If you need less force, stepping down to the 20 mm bore yields 157 N push, whereas stepping up to the 32 mm bore provides 402 N push. Choose this MBLCJ variant over the MBLJ when your moving mass demands tunable end-of-stroke deceleration rather than a fixed rubber bumper, or over the MBLC when you need the 50 mm rear stroke adjustment window.
Remember that the rear stopper only sets the travel end and the cushion only decelerates; neither holds the load pneumatically. Mounting is limited to Basic, FA flange, or LB foot styles, as no SDB pivot or back-cover options exist for this series. At 300 mm travel, the Ø10 mm rod is highly susceptible to side-load bending, so an external guide rail is mandatory. Replacement requires matching bore 25, stroke 300, adjust 50, G1/8 port, PT thread, and no 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 MBLCJ25X300-50 FAQ
This 25 mm bore cylinder provides 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 stroke for this bore size.
No, this specific SKU lacks the -S magnet suffix, so it cannot accept CMSG, DMSG, or EMSG sensors. The 50 mm rear adjustment is a travel stop that sets the end position within a 250-300 mm window, and the air cushion only decelerates the load; neither component pneumatically locks or holds the load in place.
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