Looking For 90-1 Dividing Head Chart | The Hobby-Machinist
WEB8,903. May 28, 2015. #7. cathead said: I have dividing plates and am looking for a chart or charts that tell one which dividing plate (# of holes) to use for a given number of divisions in 360 degrees. cathead, I already have an all-singing, all-dancing version of the spreadsheet that would be configurable for any worm gear ratio and dividing ...
Looking for printable chart for 40:1 dividing head
WEBApr 22, 2016 · In the Workshop Prsctice Series # 37 " Dividing"by Harold Hall are printed tables for 40:1, 60:1 and 90:1 gear ratios. . In these table you will find the number of divisions, turns and hole spacing depending on the number of holes in the division circle. Have a good day Ray.
Looking For 90-1 Dividing Head Chart | Page 3 - The Hobby …
WEBJan 1, 2014 · Just for fun, here's a pretty complete table for my own 90:1 rotab, which uses the same dividing plates you have. Note 1 - All my holes are on two disks, which I've called A and B. Your diskss may differ, but all your hole sets are there. Note 2 - The 51 and 57 hole patterns aren't of any use that I can come up with.
Excel sheet to calculate divisions on a BS0 dividing head
WEBJun 15, 2018 · Now, let's put that skill into proper use. I have prepared an excel sheet that contains all possible divisions between 3 and 200 for a BS0 dividing head. The sheet can be adopted to other type of dividing head simply by inputting the number of direct division steps and the worm gear ratio. Also, the number of holes in the dividing disks can be ...
Looking For 90-1 Dividing Head Chart | Page 2 - The Hobby …
WEBMay 28, 2015 · For a 90:1 worm gear we get 360/90 = 4 degrees per rotation. For 19 divisions the step angle is 360/19 = 18.94736 deg. In hman's copy for 19 divisions it claims 4 full turns plus 8 more holes on the 38 hole circle. In numbers that is: (4 + 8/38) x 4 deg/rotation = 16.8421 deg.
Drill Tip Lengths - A Drill Chart to Share and Some Math
WEBJan 20, 2013 · The chart is attached and is in .pdf format. It is sized for legal paper, 8.5 x 14. If you have any inclination to use it, I suggest printing it out in color and laminating it. I keep a few spread out in the shop and one at my desk, and find them equally handy as just a drill chart. Here is the chart -> View attachment drill_chart_with_tip ...
Complete Gear Cutting and Dividing Plate Spreadsheet
WEBSep 16, 2016 · This Spreadsheet will allow calculating any gear indexing plate set up. It will calculate all Gear dimensions. It is a spreadsheet on 4 pages. The 3rd page will allow calculating number of teeth up to 127 (Logan Lathe max usage) with any indexing plate or rotary table. Enter the number of turns for 360 of your table, I have included standard ...
The Mathematics of Dividing | The Hobby-Machinist
WEBAug 16, 2011 · To divide a circle into 20 parts: two turns of the crank would equal two 40ths, or one 20th of a circle. One fourth of a crank turn (or 6 holes in a 24 hole index circle) would equal one 160th of a circle at the spindle. Here is the formula: crank turns = 40 / N. where N = the desired number of equal divisions at the spindle.
40:1 dividing head plates - hole numbers? | The Hobby-Machinist
WEBMar 17, 2017 · Do the math. 360 Deg, / 40 is 9 Deg. per revolution. A 9 hole plate will yield 1 Deg, of rotation per hole. To rotate a part 10 Deg. would require 1 revolution plus 1 division. Scale it up or down. The maths are not a problem, and that I knew. What I was looking for was the 'content' (sets of holes per plate) of the set of plates that would ...
Rotary Tables vs. Dividing heads | The Hobby-Machinist
WEBSep 28, 2014 · This does make dividing gears and hole circles a lot easier. On the bottom left is a Rotary Table that can be tilted to any angle between 0 and 90 degrees. Thus, this feature, although somewhat rare on Rotary Tables, is not limited to only the Dividing Heads. This photo shows some Dividing Heads. These are generally more compact than Rotary ...