Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U is a genuine double-acting aluminum-barrel mini round cylinder with a Ø20mm bore and 400mm stroke, G1/8 air ports and a fixed rubber bumper. Its compact riveted body suits push, hold and clamp motion in tight machine spaces.
- BoreØ20 mm
- Stroke400 mm
- Port sizeG1/8
- Acting typeDouble acting
- Rod threadM8×1.25
- CushionRubber bumper (MBLC variant: adjustable air cushion)
About the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U
The AirTAC MBLC20X400U is a compact double-acting aluminum mini cylinder featuring a 20mm bore and 400mm stroke, delivering 157N of push force at 0.5MPa. Because this SKU lacks the -S suffix, it has no built-in magnet and cannot support CMSG, DMSG, or EMSG position sensors. The defining feature over the base MBL is the screw-adjustable pneumatic cushion at both ends, which decelerates the piston smoothly near stroke extremes rather than slamming into a fixed rubber bumper.
This tunable end-of-stroke control is critical for a 400mm travel distance, where impact velocity builds significantly. The riveted rolling-packed aluminum barrel keeps the body light and compact for tight spaces, while the 20um hard-chrome plating on the carbon-steel rod defends against wear. Note that the cushion only decelerates the load; it does not lock position if air pressure drops.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø20 mm |
| Stroke | 400 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 | Rubber bumper (MBLC variant: adjustable air cushion) |
| Max stroke | Up to 500 mm |
Specifications follow the official AirTAC MBL series datasheet. Confirm against the product label before installation. Standard stroke to 500 mm (special order to 800 mm). 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 safety margin.
Model Code: Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 20 | Bore size in mm. |
| ×400 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related variants: MBLC (adjustable cushion), MBLD (double rod), MBLJ (adjustable stroke), MSBL/MTBL (single acting).
Where the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U Is Used
PCB Shuttle Routing
Moves populated PCB trays along a 400mm path, using the adjustable air cushion to halt the 157N thrust smoothly without jarring delicate solder joints.
Thin Carton Indexing
Pushes lightweight packaging blanks down a feed lane, where the 20mm bore provides just enough force without crushing the board.
Sensor Probe Extend
Extends a testing probe across a 400mm gap to contact microchips, relying on the tunable cushion to prevent harsh end-cover impacts on fast cycles.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U the Right Cylinder?
Step down to the 12mm bore class for lighter duties, or step up to the 25mm bore (245N push at 0.5MPa) if your load exceeds the 157N capacity of this 20mm cylinder. Choose the MBLC over the standard MBL when cycle speeds are high enough that the fixed rubber bumper would degrade prematurely. This MBLC20X400U configuration uses a PT port thread, an M8x1.25 rod-end thread, and a U flat-end back cover for rigid mounting.
At 400mm of stroke, the Ø8mm piston rod is highly susceptible to bending under side loads. To prevent rod damage, use an external guide rail, select a CA or SDB pivot bracket to absorb angular misalignment, or switch to an MBLD double-rod cylinder. Remember that a plain double-acting cylinder drifts when air is lost; add an external rod lock if the load must be held mechanically.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (LB / FA / SDB) and back cover (CA pivot / U flat-end).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X400U FAQ
At 0.5MPa it pushes 157N and pulls 132N. At 0.7MPa it pushes 220N and pulls 185N. The theoretical maximum is 32kgf at 1.0MPa. It uses a G1/8 port with PT threading, an Ø8mm rod, and an M8x1.25 rod-end thread.
The screw-tunable needle lets you dial in the exact exhaust restriction to decelerate the piston before it hits the end cover. This is essential for a 400mm stroke where speeds are higher, reducing noise, vibration, and impact wear compared to a fixed rubber bumper.
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