～Φ710 : Steel body Φ800～ : Cast iron body
Chuck size 21"～71"（Φ535～Φ1800）
With chip cover
SRK-3J：　Ｔ-slot・３-jaw type
SRK-6J：　Ｔ-slot・６-jaw type
SRV-3J：　Tap hole・３-jaw type
SRV-6J：　Tap hole・６-jaw type