1. The difference between shape chuck and matching usage. ER clamp collet is used with ER toll holder nut, SK clamp collet is used with SK Tool Holder nut.
2. The difference of model, size and clamping range. ER clamp collets are divided into eight types: ER8, ER11, ER16, ER20, ER25, ER32, ER40, ER50. SK clamp collets are divided into five types: SK06A/AA, SK10A/AA, SK16A/AA, SK20A/AA, SK25A/AA.
2. The price difference, SK clamp collet price is higher than ER clamp collet. The total amount of ER clamp collet is also larger than sk clamp collet.