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Formulae for calculating dividing head | |||
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Posted by: savo ® 04/08/2008, 09:45:48 Author Profile eMail author Edit |
What are the two formulae used for calculating the number of turns and fractions of turns of the crank on a dividng head? I have one so far.... crank turns = 40/N
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: Formulae for calculating dividing head | |||
: Formulae for calculating dividing head -- savo | Post Reply | Top of thread | Forum |
Posted by: randykimball ® 04/08/2008, 17:11:00 Author Profile eMail author Edit |
Welcome aboard,
You need to find an old machinest and get your hands on an older copy of Machinery's Handbook. It will be the last word (best advice) on dividing heads... hardly anyone uses them anymore. Only old machinest will know how to use them...that would be me... but I've forgotten how. It has been many years since I've even seen one. Almost everyone uses a rotory table or does the trig and uses X & Y cords now with digital readouts. I gave away my "OLD" Machinery's Handbook or I would give you a straight answer. You may find one in a liabary. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. |
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Posted by: Marky ® 04/09/2008, 10:46:36 Author Profile eMail author Edit |
From the XXth edition...stole it from DiVinci...me and Leo go way back. tanD = cos(360deg/N) X cotB
Setting-angle A = D-E A = Setting Angle for Dividing Head
You still need a copy of Machinist Handbook. There are illustrations and other tables. I would just buy a gear. Good Luck...May our head be divided and not our country!!..My Tribute to Charlton "Moses" Heston. I'll kindly pay you Tuesday..for a hamburger today....Whimpy Modified by Marky at Wed, Apr 09, 2008, 10:47:57 |
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Posted by: randykimball ® 04/09/2008, 14:23:53 Author Profile eMail author Edit |
Marky,
As I recall, my first MH book was a 6th addition... does that date me? I sure wish I had it. There was a wealth of information there on babbit, gear heads, dividing heads, tool steels, heat treatment, tool sharpening, Landis die heads, .... wow.. all gone now. The worst suggestion of your lifetime may be the catalyst to the grandest idea of the century, never let suggestions go unsaid nor fail to listen to them. |
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Posted by: Marky ® 04/09/2008, 15:04:49 Author Profile eMail author Edit |
OMG...I had 12th....6th edition!! That must have been tough to carry around...being made from granite. ;) I'll kindly pay you Tuesday..for a hamburger today....Whimpy |
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