Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125CA
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125CA 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 MBLC20X125CA
The AirTAC MBLC20X125CA is a compact double-acting aluminum mini cylinder featuring a 20mm bore and 125mm stroke. It delivers 157N of push force and 132N of pull force at 0.5 MPa. The riveted rolling-packed aluminum barrel keeps the frame light for tight spaces, while the heterogeneous two-way grease-retaining piston seal maintains lubrication over high cycle counts. This CA variant uses a pivot clevis back cover that swings on a pin to accommodate arcing loads.
Equipped with a screw-adjustable pneumatic cushion at both ends, this model decelerates the piston smoothly near each stroke end. You tune the needle to match load and speed, cutting end-cover impact and vibration on faster moves. The Ø8mm carbon-steel rod features 20µm hard-chrome plating for wear resistance. Note that this specific SKU lacks a built-in magnet, so it cannot accept a CMSG, DMSG, or EMSG sensor switch for position detection.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125CA Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125CA |
|---|---|
| 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 MBLC20X125CA
| 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 MBLC20X125CA Is Used
Textile Loom Guide
Drives a thread guide arm on a textile loom, using the 125mm stroke and CA pivot to arc the yarn smoothly while the cushion absorbs the rapid end-of-stroke snap.
PCB Depaneling Gate
Operates a pneumatic gate on a PCB depaneling router, where the 157N push force shifts the guard and the cushion prevents shock vibration from transferring to the spinning spindle.
Pharma Carton Flap
Tucks an inner flap on a pharmaceutical cartoning machine, fitting the compact frame into the tight sealing head while the cushion softens the 30-800 mm/s travel.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X125CA the Right Cylinder?
For sizing, stepping down to a 25mm bore yields 245N of push force at 0.5 MPa, while no smaller standard MBL bore exists below 20mm. Stepping up to 25mm is advised if your load exceeds the 157N rating. Choose this MBLC over the base MBL when your cycle speed or moved mass outpaces the fixed rubber bumper's absorption capacity. The adjustable air cushion only decelerates near the ends; it is not a lock. A plain MBLC will not hold position if air is lost or the valve centers, so add an external rod lock for vertical or gravity-drop holding. This replacement matches: 20mm bore, 125mm stroke, G1/8 port, PT thread, CA pivot 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 MBLC20X125CA FAQ
At 0.5 MPa, this 20mm bore cylinder provides 157N of push force and 132N of pull force. At 0.7 MPa, push increases to 220N and pull to 185N. The theoretical maximum is 32 kgf at 1.0 MPa. It operates at speeds from 30-800 mm/s.
The MBLC20X125CA features a screw-tunable pneumatic cushion at both ends. You adjust the needle valve to trap a pocket of exhaust air, decelerating the piston smoothly before it hits the end cover. This is ideal for faster cycling, replacing the fixed rubber bumper of the base MBL to reduce noise and wear.
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