Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X20-20
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X20-20 is a genuine double-acting aluminum-barrel mini cylinder with a Ø25mm bore, a 20mm nominal stroke and a rear adjustable-stroke stopper — trim up to 20mm for a usable window of 0–20mm. Adjustable air cushion (both ends).
- BoreØ25 mm
- Stroke20 mm
- Adjustable0–20 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 MBLCJ25X20-20
The AirTAC MBLCJ25X20-20 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. With a 25mm bore, it delivers 245N push and 206N pull force at 0.5 MPa. The rear stopper allows you to trim up to 20mm of travel, creating a usable stroke window of 0-20mm. This makes it highly effective for applications requiring exact end-positioning rather than relying on the full 20mm stroke. The integrated adjustable air cushion lets you screw-tune the end-of-stroke deceleration, absorbing kinetic energy to protect the end covers and allowing faster cycle speeds without impact shock.
This SKU features a Ø10mm carbon-steel rod with 20µm hard-chrome plating and an M10x1.25 rod-end thread. It uses a G1/8 port with a default PT thread form. The riveted rolling-packed aluminum barrel and heterogeneous two-way grease-retaining piston seal maintain consistent lubrication for speeds of 30-800 mm/s. Note that this specific model lacks the -S magnet option, meaning it cannot support CMSG, DMSG, or EMSG position sensors. The rear travel stopper sets the movement endpoint, while the cushion governs deceleration; neither component mechanically locks or holds the load in place without continuous air pressure.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X20-20 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X20-20 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø25 mm |
| Nominal stroke | 20 mm |
| Adjustable window | 0–20 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 MBLCJ25X20-20
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 25 | Bore size in mm. |
| ×20 | 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 MBLCJ25X20-20 Is Used
PCB Drill Head Indexing
Provides 245N of push force to position a small routing head, using the 0-20mm stroke trim to dial in the exact Z-axis contact depth without adding mechanical spacers.
Micro-Clamp Tensioning
Regulates clamping force on delicate film webs, using the adjustable air cushion to softly decelerate the 206N pull load and prevent web tearing during high-speed retraction.
Sensor Probe Positioning
Sets a precise inspection gap for optical probes, utilizing the 0-20mm usable stroke window to fine-tune the standoff distance against a fixed physical stop.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ25X20-20 the Right Cylinder?
When sizing this 25mm bore cylinder, stepping down to the 20mm bore yields 157N push force at 0.5 MPa, which is better for lighter, faster pick-and-place tasks. Stepping up to the 32mm bore provides 402N push force, necessary for moving heavier jigs or overcoming higher friction. Choose this MBLCJ over the MBLJ variant when your moving mass requires tunable pneumatic deceleration rather than a fixed rubber bumper, or over the MBLC when you need to fine-tune the end-of-stroke position within that 0-20mm window. Remember that the rear adjuster is a travel stop, not a lock; the cylinder will drift if air pressure is removed, so external mechanical locks are required for fail-safe holding. Mounting is limited to Basic, FA (flange), or LB (foot) brackets; the MBLCJ series does not support SDB pivot mounts or back-cover configurations. For a direct replacement, match the 25mm bore, 20mm stroke, 20mm adjust code, G1/8 PT port, and lack of a 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 MBLCJ25X20-20 FAQ
At 0.5 MPa, this 25mm bore cylinder provides 245N push force and 206N pull force. At 0.7 MPa, the push force increases to 343N. The maximum theoretical force is 50 kgf at 1.0 MPa.
The rear stroke adjuster is a mechanical travel stop that lets you trim the end position within a 0-20mm usable window. The adjustable air cushion is a screw-tunable valve that controls deceleration at the stroke ends. Neither holds the load; the adjuster sets the endpoint, and the cushion absorbs kinetic energy.
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.
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