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Cutting some gears


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  #1  
Old 12-23-2015, 09:16:41 PM
Rob Charles Rob Charles is offline
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Default Cutting some gears

Just thought I would post some pics of gears I made over the last couple of weeks. First pic is a cam gear for a 6hp Famous. The next 2 are for a cam gear for a 3 hp Backus. the last is for the crankshaft gear for the Backus. I made it long ,cut the teeth, and sliced off the gears. the Backus uses #9 Dp which is a bit odd for today . Travers Tool actually had the cutters. The old Cincy #2 and it's dividing head work well. Rob
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  #2  
Old 12-23-2015, 09:58:33 PM
bartlett0815 bartlett0815 is offline
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Default Re: Cutting some gears

Rob,
From the pictures you posted it appears you know what you are doing. I've never cut gears but sometime in the coming year I intend to make a gear (15 tooth, if I remember correctly) for a 2hp Witte Type B. I could use the gear I've got, but want the challenge and experience of making a new one. I've got a DoAll vertical mill (Bridgeport clone) that I'll use. Is there any advantage and/or disadvantage in cutting gears vertically or horizontally? Of course I still need to work out a few details in order to use my Craigslist dividing head (without a chuck) or the surplus auction right angle milling attachment (missing arbor support). And since I'll need another cutter, does anyone know what the proper angle is for the 1924 Witte timing gear? It seems that everything I need to do requires that I do something else first.
Thanks and Merry Christmas,
Kevin in Wilmington, NC
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Old 12-23-2015, 11:03:41 PM
Joseph Cissell Joseph Cissell is offline
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Default Re: Cutting some gears

Rob, Excellent job and I know you know what you are doing. Merry Christmas to you and your Family. Also, Merry Christmas and a Big Happy New Year to all the Engine, Tractor and Steam collectors and their Family's out in Engine Land. Thanks, Joe A.
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Old 12-23-2015, 11:22:56 PM
Rob Charles Rob Charles is offline
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Default Re: Cutting some gears

Hi Kevin,A vert. mill will work but does have some disadvantages like needing to use a stub arbor(only supported on 1 end) , and sometimes it runs too fast. You can use the right angle head and it's arbor support if you can find 1. The rt angle head has a reduction in it so it runs slower. Witte gears usually have pretty big teeth so you would need to rough out or take a few cuts to get rid of the excess material. Most gears on our old engines are going to be 14 1/2 degree pressure angle . Sounds like you will need to round up a chuck for your dividing head. To figure out your outside dia. you take the no. of teeth add 2 and divide by diametrical pitch and that is your od. The gear cutter has a depth listed on the side . Probably the hardest thing to do is measure the gear tooth without a gear tooth vernier. You can use the old gear for the depth. Rob
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Old 12-23-2015, 11:58:33 PM
bartlett0815 bartlett0815 is offline
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Default Re: Cutting some gears

Rob,
I have various sized stub arbors already so I'll need to find a 14-1/2 degree cutter. The dividing head is a very old Browne & Sharp that takes an arbor held by a lathe dog. I have a suitable arbor but will need to find/fab a suitable tailstock. There is no hurry for this project, so finding or fabricating the needed pieces is part of the fun. Thanks for the advice.
Merry Christmas,
Kevin in NC
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