The No. 61 Angular Hypoid Tester Is Designed To Test Large Bevel And Hypoid Gears Up To 90" Diameter And With Shaft Angles From 0 - 135 Degrees. Spur, Helical And Internal Gears Can Also Be Accommodated. The Drive Or Pinion Spindle Can Be Rotated In Either Direction At A Recommended Spindle Speed Of 600 Rpm. It Is Mounted In A Head Which Is Vertically Adjustable On A Column, So That The Spindle Can Be Offset Either Above Or Below The Center Line Of The Gear Spindle For Testing Hypoid Gears. The Pinion Head Column Is Adjustable Angularly In A Horizontal Plane To Permit Testing Of Gears Of Any Shaft Angle From 0 - 135 Degrees. Maximum Workpiece Diameter 90"