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Thread: Ball tipped handles
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25th Dec 2010, 08:24 AM #1Intermediate Member
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Ball tipped handles
I really admire the older style handles that have a ball at each end, one might be a nut on a tools post for instance, and a tapered shaft.
Is there some set design principle that describes the size ration of the two balls and the taper.
These seem to me to fit some form of underlying design that is described like Phi, or Pi for that matter. Some form of "golden" ration that one should apply.
I guess I need to make a ball turner first.
By the way, Happy Christmas, though I am a bit more of a "bah humbug" now the kids have grown.
Tony
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25th Dec 2010, 10:56 AM #2Most Valued Member
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There is, I have it in a book somewhere, but I'm a little busy just now. I'll have look later in the afternoon.
Cheers
Stuart
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25th Dec 2010, 11:46 AM #3
The formula for ball handles is in G H Thomas' Model Engineers' Workshop Manual .
Some where, it's on line as well but I'm unable to find the link ATM.
Kev."Outside of a dog a book is man's best friend ,inside a dog it's too dark to read"
Groucho Marx
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25th Dec 2010, 12:16 PM #4Dave J Guest
Hi Tony,
These links might help.
Latest projects -- making ball crank handles - The Home Shop Machinist & Machinist's Workshop BBS
Mandrel Handle
Dave
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25th Dec 2010, 12:17 PM #5.
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Tony,
Pages 99 and 100 of Georges book attatched.
BT
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25th Dec 2010, 05:08 PM #6Most Valued Member
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from model engineer's handbook by Tudal Cain
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25th Dec 2010, 06:36 PM #7Intermediate Member
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Thank you all guys, this info is precisely what i was after. They are so cool, I know they would cost more to make, but if i were in the business of making and selling machinery, they would be what I'd use.
I now just have to make a ball turner. Then a tool post handle, then a saddle, tailstock, cross slide handle, then a ............ handle, then a .... I can this can get out of control.
Seriously, thank you all and on christmas too.
Take care, Tony
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26th Dec 2010, 07:44 AM #8Intermediate Member
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It occurred to me that how could my favorite book not have details on these handles, and sure enough I found two pages on handles including these bell crank types.
The Machinery's Handbook is a continual surprise. But as the idea of spending the ask on the current editions, I bought the collectors leather bound first edition reprint for only $50, noting that much within would not be subject to change. It is a beautiful book that looks like a bible, gold leaf edges, black leather binding, fine pages etc. I real bargain.
Tony
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29th Dec 2010, 08:03 AM #9Most Valued Member
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extract from one of the links Dave posted
"Not sure from your answer as to if they are balanced. If they are not, the heavy end will slowly move to the bottom by machine vibration and you'll never get an accurate cut."
its getting harder Roulston......
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29th Dec 2010, 08:09 AM #10Intermediate Member
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