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Rotary Index Tables (RITs) are special tools used for the accurate positioning and movement of workpieces during the milling process. Their applications scope is wide, but their working principle is focused around calculation of vertical intervals.
These rotating tables can be either manually operated or computer controlled, through a worm-screw that is fixed under the table and on to axial protrusions that turn the table clockwise or counter-clockwise for a complete 360 degrees turn. The maximum intervals number and indexing resolution depends on the worm-screw to table ratio.
Unique Milling Techniques
Rotary index tables can be used for a number of specialized processing techniques and provide solutions in demanding occasions. The most noteworthy utilization of RITs is when combined with a chuck, tailstock and stepper electric motor to work as a light lathe alternative. This use though requires special care and the fast turning of the worm-screw by the motor can accelerate the wear of the table axles.
Another thing that can be realized through the use of a RIT is bolt head processing. Machinists can calculate the desired intervals and configure their RIT to accommodate the milling of pentagonal or hexagonal indentations onto a bolt's head.
Cutting & Drilling Uses
Rotary Index Tables are also used for cutting arcs of high precision and variable curvature. Through the addition of a compound table, the machinist can freely change the position of the center of processing, thus creating a gradually opening or closing arc.
If you're using an underpowered milling machine that can't drive large drills for the creation of large diameter holes, then a rotary index table can be utilized to gradually open an initially small hole into a larger one at the same precision of one time drill. The most demanding metalworking process that requires high levels of precision and accuracy is the helical machining.
Helical machining is another point where rotary index tables can prove their usefulness. Calling for high precision and demanding processing, helixes are not easily materialized using conventional tooling. To create something that takes shape in the three dimensional space, you will need to move the workpiece or the cutting tool along at least three axis (x, y, z). RITs can help on this endeavor by providing the helix stepping through their rotation. This also calls for some pre-calculation and setting depending on the helix mathematical characteristics.
Last, there is one simple purpose that rotary index tables fulfill with great success and that is the drilling of equidistant holes on a circular flange. The operator calculates the technical details based on the RIT ratio, holes number and distance of boring centers. The table is then properly configured and the holes are bored with speed and precision. If the holes diameter exceeds the drilling limitations, multiple smaller holes can be drilled using an additional compound table.
These rotating tables can be either manually operated or computer controlled, through a worm-screw that is fixed under the table and on to axial protrusions that turn the table clockwise or counter-clockwise for a complete 360 degrees turn. The maximum intervals number and indexing resolution depends on the worm-screw to table ratio.
Unique Milling Techniques
Rotary index tables can be used for a number of specialized processing techniques and provide solutions in demanding occasions. The most noteworthy utilization of RITs is when combined with a chuck, tailstock and stepper electric motor to work as a light lathe alternative. This use though requires special care and the fast turning of the worm-screw by the motor can accelerate the wear of the table axles.
Another thing that can be realized through the use of a RIT is bolt head processing. Machinists can calculate the desired intervals and configure their RIT to accommodate the milling of pentagonal or hexagonal indentations onto a bolt's head.
Cutting & Drilling Uses
Rotary Index Tables are also used for cutting arcs of high precision and variable curvature. Through the addition of a compound table, the machinist can freely change the position of the center of processing, thus creating a gradually opening or closing arc.
If you're using an underpowered milling machine that can't drive large drills for the creation of large diameter holes, then a rotary index table can be utilized to gradually open an initially small hole into a larger one at the same precision of one time drill. The most demanding metalworking process that requires high levels of precision and accuracy is the helical machining.
Helical machining is another point where rotary index tables can prove their usefulness. Calling for high precision and demanding processing, helixes are not easily materialized using conventional tooling. To create something that takes shape in the three dimensional space, you will need to move the workpiece or the cutting tool along at least three axis (x, y, z). RITs can help on this endeavor by providing the helix stepping through their rotation. This also calls for some pre-calculation and setting depending on the helix mathematical characteristics.
Last, there is one simple purpose that rotary index tables fulfill with great success and that is the drilling of equidistant holes on a circular flange. The operator calculates the technical details based on the RIT ratio, holes number and distance of boring centers. The table is then properly configured and the holes are bored with speed and precision. If the holes diameter exceeds the drilling limitations, multiple smaller holes can be drilled using an additional compound table.
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