Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125SCA
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125SCA is a genuine double-acting aluminum-barrel mini round cylinder with a Ø20mm bore and 125mm 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
- Stroke125 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 MBLC20X125SCA
The AirTAC MBLC20X125SCA is a compact double-acting aluminum mini cylinder featuring an adjustable air cushion at both ends. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa, making the 125 mm stroke well-suited for fast, repetitive small-part positioning. A screw-tunable needle decelerates the piston near each stroke end, minimizing impact and vibration on heavier or high-frequency moves without acting as a load lock.
This configuration includes a CA pivot clevis back cover that swings on a pin to accommodate arcing angular loads, alongside a built-in magnet (-S) for position sensing. The riveted rolling-packed aluminum barrel keeps the body light and compact for tight spaces, while the Ø8 carbon-steel rod features 20 µm hard-chrome plating paired with a heterogeneous two-way grease-retaining piston seal for lasting friction control.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125SCA Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125SCA |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø20 mm |
| Stroke | 125 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 MBLC20X125SCA
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 20 | Bore size in mm. |
| ×125 | 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 MBLC20X125SCA Is Used
PCB Depaneling Router
Drives a routing blade across 125 mm to singulate PCB panels, using the tunable cushion to brake the 8 mm rod smoothly and prevent impact spikes on the end covers.
Semiconductor Wafer Cassette
Indexes a wafer cassette out of a loadport port, where the CA pivot absorbs slight angular misalignment and the CMSG reed switch confirms the exact extended position.
Pouch Sealing Jaw
Actuates a heated sealing jaw for flexible packaging, relying on the 157 N push force at 0.5 MPa to close while the air cushion softens the high-frequency end-of-stroke strike.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125SCA the Right Cylinder?
For lower force needs, stepping down to the 20 mm bore is not an option here, but stepping up to the 25 mm bore yields 245 N of push force at 0.5 MPa if your payload exceeds the current 157 N rating. Choose this MBLC variant over the base MBL when your cycle speed or moving mass outpaces what a fixed rubber bumper can absorb. The CA pivot mount is essential for arcing loads, but note that a plain double-acting cylinder will drift if air is lost; an external rod lock is required for fail-safe holding. Replacement parts must match the 20 mm bore, 125 mm stroke, G1/8 port, PT thread, CA back cover, and -S 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 MBLC20X125SCA FAQ
At 0.5 MPa it provides 157 N push and 132 N pull. At 0.7 MPa it provides 220 N push and 185 N pull. The maximum theoretical force is 32 kgf at 1.0 MPa.
A screw needle at each end restricts exhaust flow to decelerate the piston smoothly near the stroke ends. Unlike the fixed rubber bumper on the base MBL, you tune this pneumatic cushion to match your load and speed, cutting end-cover impact and noise on fast moves without acting as a brake.
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Standard models usually ship in 3-4 days.
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