| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| M48 | 48 | 95 | 68 | 104 | 50 | 50 | 4 | 13 | 27 | 50 | 60 |
The M48 is designed for high-horsepower applications that utilize 48 mm shafts. To handle the torque associated with these larger motors, the coupling features a significantly longer hub and a wider body for better heat dissipation and structural stability.
Extracted from the dimensional table for the M48 configuration:
| Specification | Metric Value |
| Max Bore Capacity (d1 / d2) | 48 mm |
| Outer Diameter (D) | 95 mm |
| Hub Outer Diameter (D1) | 68 mm |
| Total Length (L) | 104 mm |
| Sleeve Length (L1) | 50 mm |
| Standard Hub Length (l1 / l2) | 50 mm |
| No. of Teeth | 50 |
The M48 is engineered for heavy industrial duty, where reliability and "clamping" power are non-negotiable:
Massive Axial Growth: The jump from 88 mm (M42) to 104 mm (M48) is a 16 mm increase in total length. Most of this growth is found in the hubs, providing a full 50 mm of shaft engagement per side.
Optimized Tooth Profile: Interestingly, the M48 retains the 50-tooth count from the M42. This suggests that the series has reached an optimal tooth density for this diameter, focusing instead on increasing the hub mass and bore capacity to manage torque.
Balanced Diameter: The 95 mm Outer Diameter (D) provides a low moment of inertia relative to its strength, making it suitable for applications that require frequent starting and stopping.
Extra Long Hub (60 mm): For specialized drives or shafts with long keyways, the 60 mm hub option provides maximum surface contact to prevent "key-rolling" or shaft fretting.
| Feature | M42 | M48 | Change |
| Total Length (L) | 88 mm | 104 mm | +16 mm |
| Hub Length (l1) | 42 mm | 50 mm | +8 mm |
| Max Bore | 42 mm | 48 mm | +6 mm |
| Outer Dia (D) | 92 mm | 95 mm | +3 mm |
Large Vertical Pumps: The longer hub length ($l1$) provides the necessary support for shafts in vertical orientations.
Primary Crushers & Shredders: Used in waste management or recycling where the coupling must absorb massive shock loads.
Mining Conveyors: Ideal for the primary drive shafts of heavy-duty belt systems.
Summary
The M48 is the "long-reach" heavy-duty model. By increasing the total length to 104 mm and the hub length to 50 mm, it offers a level of shaft security and vibration dampening that smaller models cannot match.
