Interesting find, Acquired a five lug setup today |
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Interesting find, Acquired a five lug setup today |
MrKona |
Feb 14 2009, 10:05 PM
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#61
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Senior Member Group: Members Posts: 597 Joined: 25-July 05 From: Santa Rosa, CA Member No.: 4,469 Region Association: None |
I bought a five lug set up today from a local guy off craigslist. The front is a Boge set up with 3" spacing and M-calipers. I already have a pair so I will most likely be selling these off in the near future.
It's the rears that got my attention. The hubs are originally five lug, not four lug redrilled for five. The guy who sold them to me took them off a 914 he parted out a long time ago and has been storing them ever since for an eventual five lug conversion. He sold them as he has too many projects as is. Unfortunately, I'm going to be gone for a few days and won't get a chance to dig into these until next weekend. I'm wondering if I may have acquired a set up with 914/6 stub axles. (IMG:style_emoticons/default/drooley.gif) By the way, anyone have a suggestion on how to remove the big castle nut with the suspension off the car? (IMG:style_emoticons/default/confused24.gif) Attached thumbnail(s) |
Katmanken |
Feb 22 2009, 10:04 AM
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#62
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You haven't seen me if anybody asks... Group: Members Posts: 4,738 Joined: 14-June 03 From: USA Member No.: 819 Region Association: Upper MidWest |
Looking at the splines, there are two different approaches used to make them.
The ones in your find are machined using a circular cutter that travels longitudinally along the lenght of the spline area. That type of machining would produce the characteristic "V" at the end of the groove (see red arrow). How would you do it in 1970's? Hans in the machine shop would attach to a mill and enables him to rotate the axle stub around the shaft axis in an increment of 360 degrees divided by the number of splines. Once the axle is held at the first groove positon positioned, Hans moves the bed into the axle to create a circular slot like a keyway, then Hans makes the bed travel longitudinally to cut the slot. Then Hans cranks the axle stub away from the cutter, and moves the bed back to the start position. He then rotates the axle by one spline amount and resarts the process. Remember, the whole time he is cranking this thing back and forth by hand to make the splines..... Or, maybe a rotary indexing tooling. For the production splines, you produce the square end in the groove (see blue arrows). To do this, you might use a rotary approach where a really hard spline tool is made that resembles a gear is both pressed into the axle (unhardened state) and and rotated around the axle shaft to produce the splines. Or, a linear broach could also make the square ends to the grooves. Prolly a few more processes but the point is, they may be a handmade very low volume part. Ken Attached image(s) |
MrKona |
Feb 22 2009, 12:23 PM
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#63
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Senior Member Group: Members Posts: 597 Joined: 25-July 05 From: Santa Rosa, CA Member No.: 4,469 Region Association: None |
Looking at the splines, there are two different approaches used to make them. The ones in your find are machined using a circular cutter that travels longitudinally along the lenght of the spline area. That type of machining would produce the characteristic "V" at the end of the groove (see red arrow). How would you do it in 1970's? Hans in the machine shop would attach to a mill and enables him to rotate the axle stub around the shaft axis in an increment of 360 degrees divided by the number of splines. Once the axle is held at the first groove positon positioned, Hans moves the bed into the axle to create a circular slot like a keyway, then Hans makes the bed travel longitudinally to cut the slot. Then Hans cranks the axle stub away from the cutter, and moves the bed back to the start position. He then rotates the axle by one spline amount and resarts the process. Remember, the whole time he is cranking this thing back and forth by hand to make the splines..... Or, maybe a rotary indexing tooling. For the production splines, you produce the square end in the groove (see blue arrows). To do this, you might use a rotary approach where a really hard spline tool is made that resembles a gear is both pressed into the axle (unhardened state) and and rotated around the axle shaft to produce the splines. Or, a linear broach could also make the square ends to the grooves. Prolly a few more processes but the point is, they may be a handmade very low volume part. Ken Ken, Thanks - Very interesting information... - Bryan |
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