Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50 is a genuine double-acting aluminum-barrel mini cylinder with a Ø20mm bore, a 225mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 175–225mm. Adjustable air cushion (both ends).
- BoreØ20 mm
- Stroke225 mm
- Adjustable175–225 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- 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 MBLCJ20X225-50
The AirTAC MBLCJ20X225-50 is a compact double-acting aluminum mini cylinder featuring a rear travel stopper and an adjustable air cushion at both ends. It delivers 157 N push and 132 N pull force at 0.5 MPa from a 20 mm bore. The rear adjuster allows you to trim up to 50 mm of travel, creating a usable stroke window of 175 to 225 mm for precise end-position tuning.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable pneumatic cushioning to decelerate heavier or faster moves, protecting the end covers. The 8 mm carbon-steel rod features 20 µm hard-chrome plating for wear resistance. Note that this specific SKU lacks a built-in magnet, so it cannot accept CMSG, DMSG or EMSG position sensors without modification. The riveted rolling-packed barrel keeps the overall footprint tight for machine spacing constraints.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø20 mm |
| Nominal stroke | 225 mm |
| Adjustable window | 175–225 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/8 |
| Rod thread | M8×1.25 |
| 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 (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 157 N | 132 N |
| 0.7 MPa | 220 N | — |
| Max (@1.0 MPa) | 32 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 MBLCJ20X225-50
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 20 | Bore size in mm. |
| ×225 | 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 MBLCJ20X225-50 Is Used
PCB Edge Trimming
Drives a high-speed routing spindle for PCB edge trimming. The 175-225 mm stroke window sets the exact cut path, while the tunable air cushion prevents end-cover impact during rapid 157 N retraction.
Lab Dispenser Positioning
Actuates a multi-stage fluid dispenser carriage in analytical equipment. The rear travel stopper dials in the exact dispensing height without moving mechanical hard stops.
Textile Guide Arm
Pivots a fabric guide arm on textile machinery. The 132 N pull force maintains proper tension, and the adjustable cushion halts the 225 mm extension smoothly to avoid yarn snags.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ20X225-50 the Right Cylinder?
For lower force needs, stepping down to the 12 mm bore class reduces the push force to roughly 80 N, whereas stepping up to the 25 mm bore increases it to 245 N at 0.5 MPa. Choose this MBLCJ over the MBLJ when your cycle speeds require tunable end-of-stroke deceleration rather than a fixed rubber bumper, or over the MBLC if you need the 175-225 mm rear travel adjustment window rather than a fixed stroke.
Remember the rear stopper sets the travel end but does not hold the load, and the cushion only decelerates; neither acts as a lock. Mounting is limited to Basic, FA flange, or LB foot brackets (no SDB pivot or back-cover options). When replacing, match the 20 mm bore, 225 mm stroke, 50 mm adjust code, G1/8 port, PT thread, and confirm no magnet is fitted. At 225 mm, the slim 8 mm rod is highly susceptible to side-load bending; always use an external guide rail.
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 MBLCJ20X225-50 FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push force increases to 220 N. The absolute maximum theoretical force is 32 kgf at 1.0 MPa operating pressure.
The rear adjustment lets you mechanically trim the stroke by up to 50 mm (yielding a 175-225 mm usable window) to set the physical travel end. The adjustable air cushion only controls pneumatic deceleration near that end point. The adjuster is a travel stop, not a lock, and the cushion cannot hold a load in place.
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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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