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Cutting Bevel Gears

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Engine Builder24/04/2010 18:22:22
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267 forum posts
Does anyone have details of the calculations for cutting constant depth bevel gears using standard involute gear cutters. I have actually cut gears before using this method using details in a borrowed book but I no longer have acess to it. Ivan Law doesn't help much in his book and only describes mitre gears, I am looking for the calculations needed when the gears are diifferent sizes.
macmarch24/04/2010 21:09:04
147 forum posts
1 photos
Hi Engine Builder,
 
Daval Gears will, if asked nicely send you a cat of "Metric Drive Components"
It contains all you could possibly wish to know about gears. They can be contacted on 01707 283131
 
Steve Garnett24/04/2010 21:25:06
837 forum posts
27 photos
It's just possible that all you need to know is in this PDF...
Engine Builder24/04/2010 21:35:52
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267 forum posts
Thank you macmarch. I already have this book but had forgotten I had it !
Thank you Steve. Details of cutting your own gears are given but refer to the special bevel gear cutters not regular involute ones like Ivan Law describes.
macmarch24/04/2010 22:01:02
147 forum posts
1 photos
Out of interest, has anyone been able to get a copy of Haroaki's (not sure of the spelling) book on building Shay type loco's where he descibes how to cut spiral bevel gears on small home equipment?   I have tried the local library but to no avail. I would find £60 for the book for a few pages somewhat  excesssive.
 
DMB24/04/2010 22:39:12
1585 forum posts
1 photos
Hi macmarch,
I bet someone, somewhere, is flogging that book on ebay for much less than £60. Give it a try.
John.
Owen24/04/2010 22:45:39
26 forum posts
I have both of Kozo Hiraoaka's Shay books and I just looked at them. In both casess he uses stock gears and reworks them to suit. Perhaps it is the Climax book,I don't have that one.
Terryd25/04/2010 06:58:34
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1946 forum posts
179 photos
Off thread slightly but perhaps of historical interest for many of us there is a delightful and very readable book on change wheels for thread cutting on the lathe.  It has the very Edwardian style of catchy title i.e.
 
"The Calculation of Gear Wheels for Screw Cutting Lathes".  By a Mr D de Vries
 
It is available as an archive resource which is all the better for being free, here:
 
 
Sorry to go OT but thought you may like it
 
Terry

Edited By Terryd on 25/04/2010 06:58:52

Edited By David Clark 1 on 26/04/2010 11:25:41

Terryd25/04/2010 07:17:37
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1946 forum posts
179 photos
Posted by John Coleman 1 on 24/04/2010 22:39:12:
Hi macmarch,
I bet someone, somewhere, is flogging that book on ebay for much less than £60. Give it a try.
John.
 
 
 Hi John,
 
The cheapest I could find the Kiraoka' book on the Shay was in the US at £43 including delivery.  The one eBay example, also in the Stated was £29 +£22 delivery to the UK (yes Pounds not Dollars)
 
 
Regards
 
Terry
Paul White 325/04/2010 10:05:33
109 forum posts
23 photos
Hi, it is in the climax book. Have the book, cut the gears, very satisfying. 
 
Can I help?
 
Paul.
John Stevenson25/04/2010 10:40:06
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5068 forum posts
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How to cheat !!
 
http://www.youtube.com/watch?v=RV8Dq6mslnE
 
John S.
Paul White 325/04/2010 10:42:24
109 forum posts
23 photos
The other matter I meant to mention is the article on cutting constant depth bevel gears that apeared in model engineer  15Nov 64 , this should help.
 
Paul.
Engine Builder25/04/2010 12:06:15
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267 forum posts
Thank you for the ref, Paul.
I have a vast collection of ME's but sadly only one issue from 1964 and its not that one!.
Can anyone scan a copy and email it?
Peter G. Shaw25/04/2010 13:34:03
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1531 forum posts
44 photos
I have found references to making bevel gears in the following:
ME Peter Foyle (20.07.97) & Dave Lammas (10.10.97).
MEW88 & 92 (Feb 03 onwards) Brian Perkins & Jim Whetren MEW 31 (possibly Sep 95 or thereabouts)
 
At least one of these, the Lammas one I think, is concerned with parallel depth gears.

 Regards,
 
Peter G. Shaw
 OK edit no. 1!
 
Abort the Dave Lammas comment. Iwas thinking of an article by G. Tardrew in ME 18 July 1986 titled Parallel Depth Bevel Gears. The article contains descriptions and calculations.
 
 

Edited By Peter G. Shaw on 25/04/2010 13:40:51

Engine Builder25/04/2010 13:46:46
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267 forum posts
Thank for your trouble Peter. I have all the issues you mention and will seek them out.
Engine Builder25/04/2010 16:09:50
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267 forum posts
Peter, I have found the Brian Perkins article and this is the most helpful. He explains the calulations in a manner I can understand and points out an error in th Ivan Law book. I can calclate the gears now, many thanks.
Peter G. Shaw25/04/2010 17:07:03
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1531 forum posts
44 photos
Glad to have been of help.
 
Good luck with your cutting.
 
Peter G. Shaw
macmarch25/04/2010 18:36:27
147 forum posts
1 photos
Hi All,
 
Thankyou for the info.  Paul White 3 perhaps you can help, ccan you contact me? (my profile).
 
cheers all
 
Ray
NEIL SMITH 125/04/2010 18:53:48
26 forum posts
I cut the differential bevels for my 3" scale Fowler using the parallel depth method,and found the Lammas information to be the most usefull,better than the Law book (imho).The gears meshed surprisingly well. Regards Neil.
Stub Mandrel27/04/2010 21:22:36
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4318 forum posts
291 photos
1 articles
What is the error Brian Perkins found? I have cut about eight bevel gears using Ivan Law's method without problems, all quite small.
 
Out of curiosity has anyone made a Eureka? I have some 2 1/2" EN1A and some 1 1/2" silver steel ready, but he specs EN8. Would EN1A cope (I might only make a couple of cutters a year).
 
Neil

Edited By Stub Mandrel on 27/04/2010 21:24:17

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