dvanlanen
Joined: 25 Jul 2006
Posts: 122
Location: Madison, WI
|
 Posted: Fri Jun 27, 2008 11:22 am Post subject: Homemade Tool For Pull Riveting In Tight Places |
 |
|
Recently I posted an e-mail passing along a technique from EAA “Hints For Homebuilders” for pull riveting in tight places, but the technique would not work for pulling the domed-head rivets on Zenith products unless the proper dome-shape is somehow ground or machined into the adapter.
I came up with a cheap and easy way to create an adapter without the need to grind or machine a custom head.
I started by determining the diameter and thread pitch of the riveter head in my hand riveter. I then determined the drill size needed to tap a hole of the same diameter and thread pitch. In my case, my Craftsman hand riveter had an 8mm head with 1.25mm thread pitch, requiring a 17/64" starting hole (essentially 1/4"). I then went to the hardware store and purchased an aluminum ferrule and stop kit with a 1/4" hole (about $2). I took one of the ferrules and threaded the hole using an 8mm x 1.25mm tap. Next I threaded the riveter head into the ferrule, measured the remaining height of the ferrule above the top of the riveter head, and marked that distance down from the top of the ferrule as the lowest point for cutting off the top. Next I determined the angle I needed to pitch the riveter away from the interfering parts (about 10 to 12 degrees), set my band saw to this angle and cut the top off of the ferrule.
I can use this tool in the same way as the "wedge" adapter in the EAA film, inserting a rivet and bending the mandrel to be perpendicular to the upper angled surface of the adapter, and then pulling it with a riveter.
You may have a problem with grip length depending on the profile of your hand riveter head. I have a low profile head, so the riveter is still able to grab the remaining mandrel that protrudes from the top of the adapter.
I've included pictures with explanations in case anyone is interested.
Dave Van Lanen
601XL - tail nearing completion
| | - The Matronics Zenith-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Zenith-List |
|
| Description: |
| # 1 - Aluminum ferrule and stop kit from a hardware store (cost approx. $2). |
|
| Filesize: |
54.77 KB |
| Viewed: |
361 Time(s) |
|
| Description: |
| # 2 - Tapping threads in the ferrule for the riveter head. |
|
| Filesize: |
70.13 KB |
| Viewed: |
354 Time(s) |
|
| Description: |
| # 3 - Riveter head threaded into the ferrule. |
|
| Filesize: |
66.6 KB |
| Viewed: |
342 Time(s) |
|
| Description: |
| # 4 - Measuring and marking the remaining height of the ferrule above the riveter head. |
|
| Filesize: |
72.27 KB |
| Viewed: |
318 Time(s) |
|
| Description: |
| # 5 - Marking off the remaining height on the ferrule as the lowest point allowed for cutoff. |
|
| Filesize: |
72.86 KB |
| Viewed: |
321 Time(s) |
|
| Description: |
| # 6 - Marking the approximate pitch on the ferrule for cutoff (not necessary if you have an adjustable bandsaw). |
|
| Filesize: |
101.81 KB |
| Viewed: |
321 Time(s) |
|
| Description: |
| # 7 - Preparing to cut off the top of the ferrule at the correct angle using a bandsaw (a hacksaw could also be used). |
|
| Filesize: |
72.61 KB |
| Viewed: |
361 Time(s) |
|
| Description: |
|
| Filesize: |
75.79 KB |
| Viewed: |
350 Time(s) |
|
| Description: |
| #9 - Adapter inserted on rivet, with mandrel bent to perpendicular to pitched surface of adapter. |
|
| Filesize: |
61.35 KB |
| Viewed: |
350 Time(s) |
|
| Description: |
| #10 - Riveter inserted onto mandrel - ready to pull the rivet. |
|
| Filesize: |
55.55 KB |
| Viewed: |
371 Time(s) |
|
|
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
