Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-20 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 20mm for a usable window of 20–40mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke40 mm
- Adjustable20–40 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM10×1.25
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-20
The AirTAC MBLCJ25X40-20 is a compact double-acting mini cylinder featuring a riveted aluminum barrel and a single Ø10 mm hard-chrome plated rod. It integrates a rear travel stopper yielding a 20-40 mm usable stroke window from a 40 mm nominal length, alongside tunable air cushioning at both ends. Delivering 245 N push and 206 N pull at 0.5 MPa, it suits precise mid-range actuation.
The integrated adjustable air cushion differs from a fixed rubber bumper by allowing screw-tuned deceleration to absorb kinetic energy, protecting the end covers during faster cycles. Note this SKU omits the -S magnet, so it cannot accept CMSG or DMSG position sensors. Additionally, the rear stopper sets the travel end but does not lock the load; a separate external guide mechanism is required to handle side loads and prevent rod bending.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 40 mm |
| Adjustable window | 20–40 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 MBLCJ25X40-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×40 | 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 MBLCJ25X40-20 Is Used
PCB Router Z-Axis
Drives a spindle or routing head on a printed circuit board depaneling machine, using the 20-40 mm stroke window to fine-tune cutting depth while the cushion halts the rapid descent.
Dispenser Valve Snubbing
Actuates a shot dispenser in an adhesive bonding line, where the adjustable cushion decelerates the 245 N push force to prevent needle valve seat damage at the stroke end.
Wire Cutter Stop
Closes a pneumatic guillotine on a wire harness production line, using the 40 mm stroke to sever copper bundles while the cushion softens the impact to protect the blade mount.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X40-20 the Right Cylinder?
If you need less force, step down to the 20 mm bore (157 N push @0.5 MPa); if your payload requires more thrust, step up to the 32 mm bore (402 N push @0.5 MPa). Choose this MBLCJ over the MBLJ when your application's kinetic energy demands screw-tunable end-of-stroke deceleration rather than a fixed bumper, or over the MBLC if you need to trim the travel window.
Remember that neither the rear stroke adjuster nor the cushion acts as a load lock—rod drift occurs without live air, so external holding is needed for vertical loads. Mounting is limited to Basic, FA flange, or LB foot styles (no SDB or back-cover options). For exact replacement matching, verify bore 25 mm, 40 mm stroke, 20 mm adjust, 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 MBLCJ25X40-20 FAQ
At 0.5 MPa, this 25 mm bore cylinder provides 245 N push and 206 N pull. At 0.7 MPa, the push force is 343 N. The maximum theoretical force is 50 kgf at 1.0 MPa.
The 20 mm rear adjuster is a mechanical travel stop that limits the usable stroke window to 20-40 mm, but it does not lock the load. The adjustable air cushion is a separate screw-tuned deceleration feature that absorbs kinetic energy at the stroke ends; it also does not hold position.
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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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