Attachment patterns define the pin dimensions for connecting buckets, thumbs, and other attachments to the excavator. The format CN-DD-CCC-GGG encodes the key measurements needed for compatibility.
The prefix 'CN' indicates a Chinese-style attachment pattern. This is the most common pattern type for imported mini excavators and their compatible aftermarket attachments.
The diameter of the attachment pins in millimeters. Common sizes include 25mm for micro/mini machines (under 1.5 tons), 30mm for small excavators (1.5-2.5 tons), and 35-45mm for larger machines.
The distance between the center of the two attachment pins in millimeters. This measurement is critical for bucket and attachment compatibility. Common values range from 90mm to 220mm depending on machine size.
The inside width between the mounting ears (dipper lugs) on the arm in millimeters. The attachment must fit within this gap. Values typically range from 85mm to 160mm.
Known Attachment Patterns
| Pattern | Pin Dia. (mm) | Pin Centers (mm) | Dipper Gap (mm) | Models |
|---|---|---|---|---|
| OEM Rhinoceros 1t | 25 | 90 | 85 | 3 |
| Small 25 mm Standard | 25 | 90 | 88 | 0 |
| Compact 25 mm Long-Link | 25 | 100 | 92 | 0 |
| Common 30 mm Mini | 30 | 100 | 96 | 0 |
| AGT QNT30 Variant | 30 | 114 | 120 | 1 |
| Wide-Stick 30 mm | 30 | 118 | 120 | 0 |
| Euro Rhinox 1J 30 mm | 30 | 126 | 105 | 0 |
| Euro-Adjacent 30 mm | 30 | 127 | 105 | 3 |
| XCMG 2.7t Class | 35 | 136 | 111 | 1 |
| XCMG 3.5t Class | 45 | 220 | 160 | 1 |