Identify the shape
Determine whether the dust boot mounts to a circular spindle body or the supported 80 x 73 mm square body.
Spindle compatibility
Choose the body shape and measurement, then confirm there is enough Z-axis clearance around the mount.
Square Type (80 x 73) uses the 80 x 73 mm square mount.
Measure the spindle body and available Z-axis clearance before ordering.Measure the body
Use calipers where possible. Do not infer spindle diameter from the collet or cutting tool.
Check clearance
Confirm the mount and skirt can travel without contacting rails, clamps, or the workholding setup.