Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125U
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125U 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 MBLC20X125U
The AirTAC MBLC20X125U is a compact double-acting aluminum mini cylinder engineered for tight spaces, delivering 157 N of push force and 132 N of pull force at 0.5 MPa. The 125 mm stroke suits mid-range indexing tasks on small assemblies. Unlike the base MBL, this MBLC variant features a screw-adjustable pneumatic cushion at both ends, decelerating the piston smoothly near stroke extremes to cut impact wear on faster cycles.
The riveted rolling-packed aluminum barrel keeps the body light and compact rather than relying on heavy tie-rods. Inside, a heterogeneous two-way grease-retaining piston seal maintains lubrication, while the Ø8 carbon-steel rod features 20 μm hard-chrome plating to resist scuffing. Because this specific SKU lacks the -S magnet code, it cannot accept a CMSG, DMSG, or EMSG position sensor switch.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125U Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125U |
|---|---|
| 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 MBLC20X125U
| 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 MBLC20X125U Is Used
PCB Depaneling Router
Provides 157 N of push force at 0.5 MPa to shuttle depaneling routers along a 125 mm track, utilizing the adjustable air cushion to soften rapid end-of-stroke impacts and protect fragile circuit board edges.
IC Test Handler Pusher
Cycles small electronic test trays with 132 N of pull force, where the compact riveted aluminum barrel fits neatly into dense semiconductor testing machinery without adding unnecessary mass.
Label Applicator Tamp
Drives a 125 mm stroke to tamp labels onto cartons at up to 800 mm/s, relying on the tunable pneumatic cushion to gently slow the piston and prevent label slippage during high-frequency packaging runs.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125U the Right Cylinder?
For lighter moves, the adjacent Ø16 bore is not offered in this series, making the 20 mm the smallest available size; stepping up to the next bore (25 mm) yields 245 N push at 0.5 MPa for heavier payloads. Choose this MBLC over the fixed-bumper MBL when cycling speeds are high enough that a rubber stop cannot adequately absorb the kinetic energy. Remember that the adjustable cushion only decelerates the load near the end caps—it is not a mechanical lock, so the rod will drift if air pressure is lost or the valve centers. Direct replacement requires matching the 20 mm bore, 125 mm stroke, G1/8 port, PT thread, U flat-end back cover, and 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 MBLC20X125U FAQ
At 0.5 MPa, it delivers 157 N push and 132 N pull. At 0.7 MPa, it provides 220 N push. The maximum theoretical force is 32 kgf at 1.0 MPa operating pressure.
A screw-tunable needle at both ends restricts exhaust flow to decelerate the piston smoothly near the stroke extremes. You tune it to match the load and speed, which reduces end-cover impact and vibration compared to a fixed rubber bumper, but it does not lock the rod in place.
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1-Year Warranty
Covers non-human-caused product damage.
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Standard models usually ship in 3-4 days.
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