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Machines
Pin Spacing
The distance between mounting pins that connect attachments to excavator arms, standardized across weight classes.
Pin spacing (also called pin centers or pin pitch) is the horizontal distance between the two mounting pin holes on an excavator arm. This is the critical measurement for attachment compatibility.
| Class | Typical Weight | Pin Config | Pin Diameter |
|---|---|---|---|
| S30 | 2-3T | 120mm | 30mm |
| S40 | 3-5T | 150mm | 40mm |
| S45 | 5-8T | 180mm | 45mm |
| S50 | 8-13T | 200mm | 50mm |
| S60 | 13-18T | 230mm | 60mm |
| S70 | 18-25T | 260mm | 65mm |
| S80 | 25-35T | 300mm | 80mm |
| S90 | 35-45T | 340mm | 90mm |
| S100 | 45T+ | 380mm | 100mm |
Measuring pin spacing: 1. Measure center-to-center of pin holes 2. Measure pin diameter 3. Measure gap width between pins
Sieruta provides a Pin Measurement Guide and offers free fitment verification for all orders.