| Size SleeveX | Max. Bore d1 / d2 mm | Outer Dia D mm | Hub Outer D1 Dia mm | Total Length L mm | Sleeve Length L1 mm | Hub Length l1 / l2 mm | Space Betⁿ Hubs l3 mm | l4 | l5 | No. of Teeth | Extra Long Hub Length l1 / l2 mm |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M19 | 20 | 47 | 32 | 54 | 37 | 25 | 4 | 10 | 8.5 | 24 | 40 |
The M19 increases the outer diameter to 47 mm and allows for a 20 mm shaft, making it compatible with a wider range of standard small-to-medium motor outputs.
The following technical data is extracted for the standard M19 configuration:
| Specification | Metric Value |
| Max Bore Capacity (d1 / d2) | 20 mm |
| Outer Diameter (D) | 47 mm |
| Hub Outer Diameter (D1) | 32 mm |
| Total Length (L) | 54 mm |
| Sleeve Length (L1) | 37 mm |
| Standard Hub Length (l1 / l2) | 25 mm |
| No. of Teeth | 24 |
The M19 provides several upgrades over the M14 that improve its torque handling and stability:
Increased Torque Density: With 24 teeth (up from 20 in the M14), the load is distributed across a larger surface area of the elastomeric sleeve, allowing for higher torque transmission without increasing the coupling's length significantly.
Shaft Compatibility: The 20 mm maximum bore allows it to fit larger industrial motor shafts, common in fractional horsepower applications.
Hub Extension: For setups requiring deep shaft engagement, the M19 offers an Extra Long Hub variant with a length of 40 mm.
Constant Gap: Like the rest of the series, it maintains a 4 mm space between hubs ($l3$), ensuring the hubs do not grind against each other during thermal expansion or axial movement.
| Feature | M14 | M19 | Change |
| Max Bore | 15 mm | 20 mm | +33% |
| Outer Dia (D) | 40 mm | 47 mm | +17.5% |
| Teeth Count | 20 | 24 | +4 Teeth |
| Total Length | 50 mm | 54 mm | +4 mm |
Standard Industrial Pumps: Used where the motor shaft is slightly larger than a basic 15 mm pilot.
Textile Machinery: The 24-tooth design provides the smooth rotation necessary for high-speed yarn processing.
Packaging Equipment: Ideal for conveyor drives that require frequent start-stop cycles.
Summary
The M19 is the "workhorse" of the small-scale SleeveX range. It offers a 20 mm bore and 24 teeth, providing a significant boost in torque capacity over the M14 while only adding 4 mm to the total length.
