- Joined
- Jan 22, 2014
- Messages
- 577
No Shop Tips, so I'm posting this here.
Disclaimer: I haven't proven the complete Excel Table, it's formulated. You may want to check what you use before starting if it's important.
After a recent project, I made up some "cheat sheets" for working with degree wheels and rotary tables. If you occasionally work with these items, you may be interested in having them nearby to minimize your time on the calculator or worse yet, a preventable mistake.
One sheet shows the most common divisions of 360* with some examples.
The second shows the incremental stop points when working around a circle for most of the common divisions. A "must have" if you have a rotary table, and good for double checking when using dividing plates. I didn't bother checking my Machinery Handbook, it may be it there too.
The degree wheel "blank" sheet (divided to 15*) enables you to use a dividing caliper w/pencil to swing a circle of a desired size on the sheet and then take a measurement to see how wide your increments will be at the outer diameter. Important to know if you plan to make, say - "X" number holes or grooves around a bar or round stock, and want "X" distance between them. Be sure to make copies or save the PDF file.
Example: If you wanted to make a 3" part, and wanted to divide it into 24 -15* increments, you'd see where the maximum size between the 15* increments at that size is about 3/16" and so you may want to drill 1/8" holes.
Anyway, if you work with this stuff you'll figure it out and hopefully this will make your life easier and the task more fun than work. I like to figure it out once and then document it because I have a short memory. I forgot where I put my Ginkgo Biloba...[h=2]Isn't math wonderful! :banghead:[/h]
Disclaimer: I haven't proven the complete Excel Table, it's formulated. You may want to check what you use before starting if it's important.
After a recent project, I made up some "cheat sheets" for working with degree wheels and rotary tables. If you occasionally work with these items, you may be interested in having them nearby to minimize your time on the calculator or worse yet, a preventable mistake.
One sheet shows the most common divisions of 360* with some examples.
The second shows the incremental stop points when working around a circle for most of the common divisions. A "must have" if you have a rotary table, and good for double checking when using dividing plates. I didn't bother checking my Machinery Handbook, it may be it there too.
The degree wheel "blank" sheet (divided to 15*) enables you to use a dividing caliper w/pencil to swing a circle of a desired size on the sheet and then take a measurement to see how wide your increments will be at the outer diameter. Important to know if you plan to make, say - "X" number holes or grooves around a bar or round stock, and want "X" distance between them. Be sure to make copies or save the PDF file.
Example: If you wanted to make a 3" part, and wanted to divide it into 24 -15* increments, you'd see where the maximum size between the 15* increments at that size is about 3/16" and so you may want to drill 1/8" holes.
Anyway, if you work with this stuff you'll figure it out and hopefully this will make your life easier and the task more fun than work. I like to figure it out once and then document it because I have a short memory. I forgot where I put my Ginkgo Biloba...[h=2]Isn't math wonderful! :banghead:[/h]
