Rear five lug hubs, machining steps. |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
Rear five lug hubs, machining steps. |
Aaron Cox |
May 8 2004, 10:41 AM
Post
#1
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
i have just discovered that my uncle has had a machine shop in his warehouse for many a year. i thinl im going to let drill my hubs and stud them. (save me some $$$) my uncle is a mini cooper guy, and has been making stainless brake pistons for aftermarket calipers i guess lately.
so what do i need to have him do? to go from 4 x 130 to 5 x 130 spotface the area where the stud goes. do i need to have him put a boss on it? (eric shea? i believe did this) give me a rundown on what is required please. |
davep |
May 8 2004, 11:07 AM
Post
#2
|
914 Historian Group: Benefactors Posts: 5,195 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada |
You have the basics correct. Many people start with a very early hub that has the both sets of bosses cast in. It would likely be useful to have bosses made where the studs will go, but I don't know the risks involved with building up the cast iron. Get the studs before you start to ensure you know the exact size hole to drill.
|
skline |
May 8 2004, 11:42 AM
Post
#3
|
Born to Drive Group: Members Posts: 7,910 Joined: 26-December 02 From: Costa Mesa, CA Member No.: 17 Region Association: Southern California |
Aaron, if you need an extra set to play with let me know as I just replaced mine on the Chalon and these are just sitting here doing nothing. You can take them and practice with them.
|
Aaron Cox |
May 8 2004, 11:48 AM
Post
#4
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
skline, pm sent.
ill take them. |
Eric_Shea |
May 8 2004, 01:35 PM
Post
#5
|
PMB Performance Group: Admin Posts: 19,288 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Simple way. Yes, 5x130. Spot face everything down to 5mm thickness. Stud them and go. You will use one of your existing bosses. You'll need to spot face it an additional 5mm (I believe) to bring it down to the level of the other faces. because they use lug bolts 914 hubs are slightly thicker than 911 hubs.
By facing down to 5mm the outside edge of the seat just cuts into the flange. When I did mine I used a set of 911 hubs as reference since the studs most people use are for 911's. I spot faced my original boss slightly down to 8mm and used 3mm ring bosses/spacers to bring the remaining 4 holes in the hub back to the 8mm 911 spec. WTFA for most folk including myself. Just spot everything down to 5mm and stud'em. |
Aaron Cox |
May 11 2004, 05:04 PM
Post
#6
|
Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
okay, my school has a bazillion dollar mill that i can use for this project. the thing accepts "mastercam" files. otherwise id have to do it all by hand (dila gauge, etc etc)
can anyone draw up a 5 x 130 rear hub file for me? i dunno how to do that, is "mastercam" a widely used file type? the mill accepts these on a floppy disk. also, does anyone have a diagram of the rear hub (blueprint) thanks. mucho appreciated. if this can get done, i can run a couple of sets of hubs for basically free. does autocad turn things into mastercam? |
peridotian |
May 11 2004, 05:34 PM
Post
#7
|
Unregistered |
Autocad can export files in various formats. You need to find out what format Mastercam wants. I suspect DXF format will be fine.
|
Lo-Fi Version | Time is now: 20th September 2024 - 04:19 PM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |