Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X250U
The AirTAC Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X250U is a genuine double-acting aluminum-barrel mini round cylinder with a Ø40mm bore and 250mm 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
- Stroke250 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 MBLC40X250U
The AirTAC MBLC40X250U is a compact double-acting aluminum mini cylinder engineered with a screw-adjustable pneumatic cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, driven through a 40 mm bore and 250 mm stroke. The U suffix denotes a rigid flat-end back cover, providing a solid mounting face for straightforward in-line installations.
This model relies on a riveted rolling-packed aluminum barrel for a lightweight yet durable structure. The 16 mm carbon-steel piston rod features 20 µm hard-chrome plating to resist wear, while a heterogeneous two-way grease-retaining piston seal maintains lubrication. Because this SKU lacks the -S magnet code, it cannot accept CMSG, DMSG, or EMSG position sensors.
Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X250U Technical Specifications
| Model | Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X250U |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder |
| Bore size | Ø40 mm |
| Stroke | 250 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 MBLC40X250U
| MBL | Aluminum-barrel mini round cylinder, double acting. |
|---|---|
| 40 | 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 MBLC40X250U Is Used
Packaging Diverters
Handles fast diverting arms on packaging conveyors where 628 N push force reliably kicks cartons, and the air cushion absorbs the rapid 250 mm stroke impact to prevent end-cover cracking.
Textile Loom Beat-up
Drives the beat-up mechanism in textile looms, using the 250 mm stroke to push the weft firmly into place while the adjustable cushion slows the 16 mm rod smoothly to cut vibration at high cycle rates.
Vertical Pallet Lifts
Raises light-tier product trays in compact vertical lift systems; the flat U back cover mounts rigidly to the frame, while the cushion prevents the 528 N pull load from slamming the retracted piston.
Is the Airtac MBLC Aluminum Alloy Mini Air Cylinder MBLC40X250U the Right Cylinder?
For sizing flexibility, stepping down to the 32 mm bore yields 402 N push at 0.5 MPa, while stepping up to the 50 mm bore provides 981 N push at 0.5 MPa. Choose the MBLC over the base MBL when your cycle speeds are too high for a fixed rubber bumper, as the needle valves here allow precise end-of-stroke deceleration. Note that the air cushion only slows the piston near the ends; it does not lock the rod, so an external rod lock is required to hold position without live air.
With a 250 mm stroke, the 16 mm rod has a low tolerance for side loading and is susceptible to bending if misaligned. To prevent premature seal failure, use an external guide rail, switch to a CA or SDB pivot bracket to accommodate arcing loads, or consider an MBLD double-rod cylinder. The replacement match for this unit is a 40 mm bore, 250 mm stroke, G1/4 port, PT thread, U flat-end back cover, no magnet, and no mounting code.
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 MBLC40X250U FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N push and 528 N pull force. At 0.7 MPa, it delivers 880 N push and 739 N pull. The maximum theoretical force is 128 kgf at 1.0 MPa.
The MBLC40X250U features a screw-tunable needle at both ends that traps and bleeds exhaust air to decelerate the piston smoothly near stroke limits. You tune it for specific load speeds to reduce impact, which is superior to a fixed rubber bumper on high-frequency fast moves, but it is not a load lock.
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