Description Of 4" (100 Mm) Rotary Table Designed For Smaller Milling Machines. Table Diameter 100 Mm Table Is Graduated 360 Degrees. Worm Gear Ratio -1:36, Which Means That The 1 Handle Rotation Shall Turn The Table By 10 Degrees. Center Height In Vertical Position: 2-1/16" (50 Mm Approx) Excluding Chuck. Hand Wheel Is Graduated In Divisions Of 10 Min & Can Be Set To Zero. Can Be Mounted Both In Horizontal & Vertical Position. Description Of Chuck Made From Chuck, The Body Of Which Is Made From Sg Iron & Jaws Are Of Tool Steel Hardened & Ground. Supplied With A Mounting Back Plate & Fixing Tee Nuts With Screws. The Back Plate Has Been Drilled In A Manner That It Will Fit To A 3 Slot Or A 4 Slot Rotary Table. A Tool Steel Back Plate Is Supplied With Fixing T Nuts To Mount The Chuck On It. Back Plate Is Drill In A Manner That It Will Fit Both 3 As Well As 4 Slots Table. The Back Side Of The Plate Has A Locating Spigot To Center The Mounting On To The Table. A Suitable M6 Clamp Kit Is Included Along.