The 1310-L Manual Tilt and Turn Table consists of two axes of motion, one for tilting and the other for rotating the table. It can be tilted in either direction from 0 to 80, or 0 to 90, depending upon the model. Rotating the handle in the desired direction will change the tilt six degrees per revolution.The vernier on the tilt axis is readable to one minute of arc with the vernier adjustable to 5. There are engraved marks at 0.5 increments on the tilt axis.The table top rotates continuously through 360 in a clockwise or counter-clockwise direction. Engraved marks are provided at 45 increments on the table top; engraved marks at 1 increments are optional. A spring-loaded steel ball engages detents in the bottom of the table top, locking it into position for quick setup. The detents are located every 45. Tables with optional engraved marks every 1 have detents every 15. The tension is adjustable for the positioning detents on the tabletop.The table includes two one-minute sensitive levels on the table base for a more accurately leveled table surface. A level platform is achieved by adjusting the leveling screws, which are mounted through the base plate. The leveling feet can compensate for as much as 5 of tilt.The top surface of the table has six tapped holes for attaching the instrument package to be tested. Simply center the instrument package on the table top and secure it. Knurled mounting screws (1/4 - 20) may be purchased separately.Model 1310-1-L:Tilt Range: 80Engraved increment on azimuth axis: 1