Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30S is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 40mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 10–40mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke40 mm
- Adjustable10–40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30S
The AirTAC MBLCJ25X40-30S is a compact double-acting mini cylinder featuring a single Ø10 mm carbon-steel rod with 20 µm hard-chrome plating. It delivers 245 N push and 206 N pull force at 0.5 MPa. A rear travel stopper allows you to trim up to 30 mm of movement, creating a precise 10 to 40 mm usable stroke window for short-stroke clamping or ejecting tasks. The riveted aluminum barrel keeps the body lightweight for tight machine envelopes.
Unlike the fixed rubber bumper found on the base MBLJ, this model features twin screw-tunable air cushions that decelerate the piston near each end cover, absorbing kinetic energy for faster cycling without shock. The -S code indicates a built-in magnet for position detection. It pairs with AirTAC CMSG reed switches or DMSG and EMSG solid-state sensors. Note that the rear adjuster sets the travel end point but does not lock or hold the load; external guidance is required for lateral stability.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 10–40 mm (trim 30 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 MBLCJ25X40-30S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MBLCJ25X40-30S Is Used
PCB Router Clamping
Uses the 10 to 40 mm adjustable window to dial in the exact clamping depth on a printed circuit board routing machine, preventing board flex during high-speed spindle routing.
Sticker Dispenser Ejector
Leverages the twin adjustable air cushions to softly decelerate the 245 N push stroke, preventing label web tearing when flicking adhesive labels out of a high-speed dispensing head.
Small Part Press Fit
Relies on the built-in -S magnet and an AirTAC DMSG solid-state sensor to confirm the end of a 40 mm press stroke for seating small bearing sleeves into aluminum housings.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-30S the Right Cylinder?
If 245 N of thrust at 0.5 MPa is too much for your fixture, step down to the 20 mm bore, which yields 157 N push force. If you need to move heavier slides, the 32 mm bore provides 402 N. Choose this MBLCJ variant over the MBLJ when your cycle speeds demand tunable end-of-stroke cushioning rather than a fixed bumper, or over the MBLC if you require a variable 10 to 40 mm stroke window rather than a fixed length. The rear stroke adjuster and the air cushion needle are strictly motion-control devices; they do not hold position pneumatically against drifting loads. Mounting options are limited to Basic, FA flange, or LB foot brackets; this model does not accept SDB pivot or back-cover mounts. To match this exact replacement, specify bore 25, stroke 40, adjust 30, G1/8 port, PT thread, and the -S 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 MBLCJ25X40-30S FAQ
At 0.5 MPa, this 25 mm bore cylinder provides 245 N of push force and 206 N of pull force. At 0.7 MPa, the push force increases to 343 N. The absolute maximum theoretical force is 50 kgf at 1.0 MPa.
The rear adjuster physically stops the piston early, creating a 10 to 40 mm usable travel window. The adjustable air cushion only controls the deceleration speed near the end covers to prevent impact shock. Neither component locks the load in place; the rod will drift without live air pressure.
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Standard models usually ship in 3-4 days.
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