Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X30U
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X30U is a genuine double-acting aluminum-barrel mini round cylinder with a Ø20mm bore and 30mm 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
- Stroke30 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 MBLC20X30U
The AirTAC MBLC20X30U is a compact double-acting aluminum mini cylinder engineered for tight spaces, delivering 157 N of push force at 0.5 MPa. Its 30 mm stroke is ideal for short, rapid clamping or ejecting tasks. The defining feature is the screw-adjustable pneumatic cushion at both ends, which decelerates the piston smoothly near stroke extremes rather than slamming into the end cover. This protects the assembly on high-frequency cycles where a fixed rubber bumper would wear out.
Constructed with a riveted rolling-packed aluminum barrel for a lightweight yet rigid body, it is not a rebuildable tie-rod design. The Ø8 mm carbon-steel rod features 20 µm hard-chrome plating, and the heterogeneous two-way grease-retaining piston seal ensures consistent lubrication over the 30-800 mm/s speed range. The U flat-end back cover provides a rigid default rear mount, and because this specific SKU lacks the -S suffix, it cannot accept a CMSG, DMSG, or EMSG position sensor.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X30U Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X30U |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø20 mm |
| Stroke | 30 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 MBLC20X30U
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 20 | Bore size in mm. |
| ×30 | 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 MBLC20X30U Is Used
PCB Depaneling Ejector
Uses the 30 mm stroke and 157 N push force to swiftly eject singulated circuit boards from a routing fixture, relying on the air cushion to prevent end-cap shock during high-frequency cycling.
Thermoform Lid Separator
Snaps small plastic lids out of a multi-cavity thermoforming mold where the 132 N pull force retracts the ejector pin smoothly without cracking the thin-walled parts.
Connector Insertion Press
Drives delicate ribbon cable connectors into PCB headers with a short 30 mm stroke, using the tunable needle to slow the rod just before the seating point for impact-free assembly.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X30U the Right Cylinder?
With a 20 mm bore, this cylinder provides 157 N push and 132 N pull at 0.5 MPa. If your fixture requires less force, there is no smaller standard MBL size, so you would opt for a different actuator type. If you need more power, stepping up to the 25 mm bore yields 245 N push at 0.5 MPa. Choose this MBLC version over the base MBL when your cycle speed is high enough that the fixed bumper cannot adequately absorb the kinetic energy, requiring tunable end-of-stroke deceleration.
Keep in mind that the adjustable air cushion only slows the piston near the ends; it is not a brake or load lock. If the air supply is lost or the valve centers, the rod will drift or drop. For position holding without live air, an external rod lock or pilot-operated check valve is required. The replacement match for this unit is: 20 mm bore, 30 mm stroke, G1/8 port, PT thread, U back cover, no magnet.
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 MBLC20X30U FAQ
At 0.5 MPa, the push force is 157 N and the pull force is 132 N. At 0.7 MPa, the push increases to 220 N. The maximum theoretical force is 32 kgf at 1.0 MPa.
A screw-tunable needle at both ends traps a pocket of exhaust air to decelerate the piston smoothly near the stroke extremes. You adjust the needle to match your load and speed, which reduces end-cover impact, noise, and vibration. It is strictly a deceleration device and does not lock or hold the load.
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