Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X250SU
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X250SU is a genuine double-acting aluminum-barrel mini round cylinder with a Ø20mm bore and 250mm 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
- Stroke250 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 MBLC20X250SU
The AirTAC MBLC20X250SU is a compact double-acting aluminum mini cylinder engineered for a 250 mm stroke. It delivers 157 N of push force and 132 N of pull force at 0.5 MPa, making it well-suited for light-load positioning tasks. The defining feature of this MBLC variant is the screw-adjustable pneumatic cushion at both stroke ends. By tuning the needle, you decelerate the piston smoothly near the covers, cutting impact noise and vibration on faster moves where a fixed rubber bumper would fail.
This specific SKU includes a built-in magnet (the -S code) for rod position detection via AirTAC CMSG reed or DMSG and EMSG electronic solid-state sensor switches. It features a G1/8 port, an Ø8 mm carbon-steel rod with 20 µm hard-chrome plating, and a heterogeneous two-way grease-retaining piston seal. The riveted rolling-packed aluminum barrel keeps the body light for tight spaces, while the U flat-end back cover provides rigid rear mounting.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X250SU Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X250SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø20 mm |
| Stroke | 250 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 MBLC20X250SU
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 20 | Bore size in mm. |
| ×250 | 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 MBLC20X250SU Is Used
PCB Conveyor Diverting
Uses the 250 mm stroke to push electronic PCBs across a transfer station, relying on the tunable air cushion to stop the 157 N thrust gently without jarring delicate solder joints.
Light-Parts Ejection
Cycles rapidly to eject small plastic mouldings from a press, where the adjustable end cushions absorb the kinetic energy of the 8 mm rod that a standard bumper cannot.
Sensor Gate Actuation
Moves a routing gate in a packaging machine, using the built-in -S magnet with a DMSG electronic switch to confirm gate position at both ends of the 250 mm travel.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC20X250SU the Right Cylinder?
Select this 20 mm bore when your application requires a long 250 mm travel but only light actuation forces (157 N push at 0.5 MPa). If you need less force and a smaller footprint, the neighbouring 20 mm bore is the smallest available option, so you would instead step up to the 32 mm bore, which provides 402 N of push force at 0.5 MPa. Choose this MBLC version over the base MBL when your cycle speeds are high enough that the standard fixed bumper cannot adequately absorb the kinetic energy.
Because this model features a 250 mm stroke paired with a small Ø8 mm rod, side-load tolerance is minimal. To prevent rod bending and premature seal wear, you should use an external guide rail, select a CA or SDB pivot bracket for arcing loads, or switch to an MBLD double-rod cylinder. Note that the adjustable air cushion only decelerates the piston near the ends; it is not a brake, and a plain cylinder will not hold position if air pressure is lost. The exact replacement match is a 20 mm bore, 250 mm stroke, PT thread, U flat-end back cover, with an -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 MBLC20X250SU FAQ
At 0.5 MPa, this 20 mm bore cylinder provides 157 N of push force and 132 N of pull force. At 0.7 MPa, the push force increases to 220 N. The theoretical maximum force is 32 kgf at 1.0 MPa. It uses a G1/8 port and an M8x1.25 rod-end thread.
The MBLC20X250SU features a screw-tunable pneumatic cushion at both ends. You adjust the needle valve to trap and exhaust a small amount of air, decelerating the piston smoothly before it hits the end cover. This protects the cylinder on fast or frequent cycles, unlike the base MBL which relies on a fixed rubber bumper. The cushion only slows the rod near the stroke ends and does not lock or hold the load.
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