What does an indexing head do?
An indexing head, also known as a dividing head or spiral head, is a specialized tool that allows a workpiece to be circularly indexed; that is, easily and precisely rotated to preset angles or circular divisions.
How do you calculate head index?
Dividing Head Formula With a 40:1 gear ratio, you’d need to turn the crank on the dividing head 40 full turns to rotate the workpiece once. To get 6 equal divisions, you’d need 40/6 = 6+2/3 = 6.66666 turns. The 6 turns are easy, but the remaining 0.66666 needs the holes on the plate.
What is universal indexing head?
The universal indexing head or universal dividing head is used to perform the following operations : To set the workpiece in the desired position, in relation to the machine table. To rotate the workpiece through the desired angle, after each cut and hence, index the periphery of the workpiece.
What indexing is required for 35 divisions?
Angular Indexing: If it is desired to index a job by 35 degree, then the index head movement required to perform the operation will be = (35/9) = 3(8/9) = 3 + ((8 X 3) / (9 X 3)) = 3 + (24/27), i.e., the crank must be turned three complete revolutions plus 24 holes in the 27-holes circle.
How do you do simple indexing?
Simple indexing on a milling machine is passed out through the use also a plain indexing head or universal dividing head. This process of indexing involves the use of a worm, crank, index head, and worm wheel. The worm wheel usually carries 40 teeth, with the worm is single-threaded.
What is simple indexing?
How do you create a professional index?
The Rules of Index Entries
- Use nouns the reader is likely to look for. Whenever possible, index entries should begin with nouns or noun phrases.
- Use lowercase letters.
- Use subentries to make things easier to find.
- Set image references in bold or italics.
- Use cross-references as needed.
- You don’t need to include everything.