Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25U
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25U 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 MBLC40X25U
The AirTAC MBLC40X25U is a double-acting aluminum mini cylinder engineered for short, rapid linear motion. It generates 628 N of push force and 528 N of pull force at 0.5 MPa. The defining feature of this MBLC variant is the screw-adjustable pneumatic cushion at both stroke ends. By tuning the needle valves, you decelerate the piston smoothly near the end covers, effectively cutting impact shock, noise, and vibration on heavy or fast moves.
This specific SKU features a 25 mm stroke and a U flat-end back cover for rigid, straight-line mounting. It utilizes a riveted rolling-packed aluminum barrel to keep the body compact and lightweight for tight machine spaces. Inside, a heterogeneous two-way grease-retaining piston seal pairs with a 20 µm hard-chrome plated carbon-steel rod for low-friction durability. Note that this configuration omits the built-in magnet, meaning it cannot host a CMSG, DMSG, or EMSG position sensor.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25U Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25U |
|---|---|
| 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 MBLC40X25U
| 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 MBLC40X25U Is Used
Staking Press Operations
Provides the 628 N push force required for riveting or staking small metal components in electronics manufacturing, where the 25 mm stroke and tuned cushions prevent over-travel damage.
Package Diverting Gates
Drives short-stroke diverter arms on packaging lines; the adjustable end cushions absorb the kinetic energy of rapid direction changes, protecting the aluminum end covers from cracking.
PCB Test Fixtures
Applies controlled clamping pressure against test probes in semiconductor QA stations, using the 528 N pull force to retract the plate rapidly without slamming the rear cover.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X25U the Right Cylinder?
Select this 40 mm bore when your application demands more power than the 32 mm option (which provides 402 N push at 0.5 MPa) but is constrained by space, preventing a jump to the 50 mm bore (delivering 981 N push at 0.5 MPa). The 25 mm stroke is optimal for brief, high-force transitions. Choose this MBLC model over the base MBL if your cycle times are fast enough that the standard fixed rubber bumper would degrade prematurely from repeated end-of-stroke impacts.
Because this SKU lacks the -S magnet suffix, it cannot support electronic or reed sensor switches; confirm if your control system requires position feedback before ordering. The U flat-end rear cover provides a rigid mounting surface, best for fixed-axis pushing. Keep in mind that while the adjustable air cushion decelerates the piston near the ends, it is not a locking mechanism—the rod will drift if air pressure is lost or the valve centers.
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 MBLC40X25U FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, push increases to 880 N and pull to 739 N. The theoretical maximum force is 128 kgf at 1.0 MPa. It uses a G1/4 port and a Ø16 mm rod with an M12x1.25 rod-end thread.
The MBLC40X25U features screw-adjustable pneumatic cushions at both ends. You tune the needle valve to trap a pocket of exhaust air, which decelerates the piston smoothly before it hits the end cover. This is critical for high-speed or heavy loads to reduce impact noise and wear, but it does not lock the rod in place.
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