Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X300SU
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X300SU is a genuine double-acting aluminum-barrel mini round cylinder with a Ø40mm bore and 300mm 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
- Stroke300 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 MBLC40X300SU
The AirTAC MBLC40X300SU is a double-acting, single-rod mini cylinder engineered for compact actuation. It provides 628 N of push force and 528 N of pull force at 0.5 MPa. A 300 mm stroke makes it ideal for traversing longer work zones where space remains restricted. The riveted rolling-packed aluminum barrel keeps the body light and tight, avoiding the bulk of a rebuildable tie-rod design.
This SKU includes a built-in magnet (-S) for compatibility with AirTAC CMSG, DMSG, and EMSG sensor switches to track rod position. The U flat-end back cover provides a rigid rear mount. Unlike the base MBL, this MBLC variant features a screw-adjustable air cushion at both ends to decelerate the piston smoothly near stroke limits, absorbing kinetic energy on fast moves without acting as a load lock.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X300SU Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X300SU |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 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 MBLC40X300SU
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 40 | Bore size in mm. |
| ×300 | 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 MBLC40X300SU Is Used
CNC Lathe Bar Feeder
Pushes raw bar stock through a spindle tube over the 300 mm stroke, using the 628 N push force at 0.5 MPa to overcome guide tube friction while the adjustable cushion prevents harsh end-of-stroke jerks.
Pallet Diverter Arm
Actuates a routing flap on a packaging conveyor, where the U flat-end mount holds rigid against the 528 N pull load and the cushion needle is tuned to softly park the arm without denting the aluminum frame.
Vertical Tray Elevator
Lifts stacked component trays in an electronics assembly cell, relying on the -S magnet and a DMSG electronic sensor to confirm the fully raised position before the cushion catches the descending load.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X300SU the Right Cylinder?
At 0.5 MPa, this 40 mm bore generates 628 N push force. If you need less force, step down to the 32 mm bore (402 N push); if your load is heavier, step up to the 50 mm bore (981 N push). Choose this MBLC over the base MBL when your cycle speeds are high enough that a fixed rubber bumper would suffer impact damage. The replacement match is: 40 mm bore, 300 mm stroke, G1/4 port, M12x1.25 rod thread, PT port thread, U flat-end back cover, and a built-in magnet.
Because the 300 mm stroke is relatively long for a 16 mm rod, side-load tolerance is low. To prevent rod bending and premature seal wear, use an external guide rail, a CA or SDB pivot mount to absorb arcing loads, or consider the MBLD double-rod cylinder. Remember that a plain MBLC does not hold position if air is lost or the valve centers; the cushion only decelerates near the ends and is not a brake.
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 MBLC40X300SU FAQ
At 0.5 MPa, it provides 628 N push and 528 N pull. At 0.7 MPa, it provides 880 N push. The maximum theoretical force is 128 kgf at 1.0 MPa.
A screw-tunable needle at both ends restricts the exhaust flow near the stroke ends, decelerating the piston to protect the end covers on fast or heavy moves. It is a velocity damper, not a load lock or brake, and does not hold position when air is removed.
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