Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25SU
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25SU is a genuine double-acting aluminum-barrel mini round cylinder with a Ø40mm bore and 25mm stroke, G1/4 air ports and a fixed rubber bumper. Its compact riveted body suits push, hold and clamp motion in tight machine spaces.
- BoreØ40 mm
- Stroke25 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionRubber bumper (MBLC variant: adjustable air cushion)
About the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25SU
The AirTAC MBLC40X25SU is a compact double-acting aluminum mini cylinder engineered for short 25mm strokes where precise end-of-travel control is essential. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. Unlike the base MBL which relies on a fixed rubber bumper, this MBLC variant features a screw-adjustable pneumatic cushion at both ends, allowing you to dial in the deceleration profile to match heavier loads or faster cycling speeds without slamming the end covers.
The riveted rolling-packed aluminum barrel keeps the body light and compact for tight machine cells, while the Ø16 mm carbon-steel rod features a 20 um hard-chrome plating to resist wear and corrosion. A heterogeneous two-way grease-retaining piston seal maintains pressure integrity across the 30-800 mm/s speed range. The built-in magnet (-S) enables contactless position detection, and the U flat-end back cover provides a rigid, straightforward rear mounting face.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25SU Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 25 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 MBLC40X25SU
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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 MBLC40X25SU Is Used
PCB Edge Routing Dams
Extends a 25 mm stroke to clamp delicate printed circuit boards during routing, using the adjustable air cushion to decelerate the 628 N push force gently and prevent cracking the substrate.
Connector Insertion Press
Drives a short, rapid stroke to seat ribbon-cable connectors into housings, relying on the tunable pneumatic cushion to soften the end-of-stroke impact and protect fragile electronic pins.
Pouch Diverter Gate
Actuates a short diverter flap on a packaging line, where the cushioned end covers absorb the repetitive high-frequency cycling of redirecting lightweight product pouches.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25SU the Right Cylinder?
Select this 40 mm bore when your application requires roughly 628 N of push force at 0.5 MPa. If you need less force and a smaller footprint, step down to the 32 mm bore which provides 402 N of push force. If your load requires more power, step up to the 50 mm bore which yields 981 N of push force. Choose this MBLC cushioned version over the standard MBL when your cycle speeds are high enough that a fixed rubber bumper would cause unacceptable impact wear or noise.
As a direct replacement, match the 40 mm bore, 25 mm stroke, G1/4 port, PT thread, U flat-end back cover, and the -S built-in magnet. Note that the adjustable air cushion only decelerates the piston near the stroke ends; it is not a locking mechanism. If the rod must hold position when air pressure is lost or the valve centers, you must add an external rod lock or pilot-operated check valve.
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 MBLC40X25SU FAQ
This 40 mm bore cylinder uses a G1/4 port and a Ø16 mm rod. At 0.5 MPa it provides 628 N push and 528 N pull. At 0.7 MPa it provides 880 N push and 739 N pull. The maximum theoretical force is 128 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 ends, which you can adjust to match your load and speed. It is not a brake or load lock; the rod will drift if air pressure is lost. The built-in -S magnet allows CMSG (reed) or DMSG/EMSG (electronic) sensors to detect the rod position.
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