Thread Tools
Old Feb 21, 2013, 11:11 PM
kenh3497 is offline
Find More Posts by kenh3497
Just Another Brick in the Wall
kenh3497's Avatar
Discussion

How I install Robart Hinge Points


Each photo has a caption. Enjoy!
RCG Plus Member
Last edited by kenh3497; Feb 23, 2013 at 08:42 AM.
Sign up now
to remove ads between posts
Old Feb 22, 2013, 07:34 AM
AL_T is offline
Find More Posts by AL_T
Registered User
What does McMaster Carr call the transfer buttons? Can you give a McMaster part number?

'Sure would take some of the guesswork out of lining up the hinge points.

Thanx!
Old Feb 22, 2013, 01:08 PM
kenh3497 is offline
Find More Posts by kenh3497
Just Another Brick in the Wall
kenh3497's Avatar
Quote:
Originally Posted by AL_T View Post
What does McMaster Carr call the transfer buttons? Can you give a McMaster part number?

'Sure would take some of the guesswork out of lining up the hinge points.

Thanx!
Here ya go Blind hole transfer punch.... http://www.mcmaster.com/#transfer-punches/=llas53
RCG Plus Member
Old Feb 22, 2013, 02:49 PM
kenh3497 is offline
Find More Posts by kenh3497
Just Another Brick in the Wall
kenh3497's Avatar
I've been looking at that style and can't find the drill that has the correct taper. I might wind up making something to fit the Robart taper. It wouldn't be all that hard to do if I could get motivated to do so

Ken
RCG Plus Member
Last edited by kenh3497; Feb 23, 2013 at 08:31 AM.
Old Feb 22, 2013, 06:38 PM
N1EDM is offline
Find More Posts by N1EDM
Registered User
N1EDM's Avatar
I would have never thought of that Transfer Punch. Thanks for that idea!! I think I'll make one of those as well.

Bob
Old Feb 23, 2013, 08:36 AM
kenh3497 is offline
Find More Posts by kenh3497
Just Another Brick in the Wall
kenh3497's Avatar
Way back when I was doing a tiny bit of tool & die work we used them all the time to transfer holes from one part to the other. I suppose now days it done via CNC machine.

I forgot to mention, and I'll edit the first post. DO NOT round or taper the aileron before drilling the holes. Having the square and flat face on the aileron helps the drill jig do it's job properly.

Ken
RCG Plus Member
Old Feb 24, 2013, 03:30 PM
tailskid2 is offline
Find More Posts by tailskid2
Registered User
tailskid2's Avatar
Ken thanks for the tip and your pics.....gonna git one of dem ther toolssss...
RCG Plus Member
Latest blog entry: GS TF Corsair hatch time
Old Feb 24, 2013, 03:45 PM
N1EDM is offline
Find More Posts by N1EDM
Registered User
N1EDM's Avatar
For anyone looking for those transfer buttons, as mentioned earlier, they are available from McMaster-Carr. Here are the details:

www.mcmaster.com . Do a search for p/n 3414A211 . You can buy a pack of 6 1/8" punches for $5.25.

Bob
Last edited by N1EDM; Jan 25, 2015 at 08:13 AM. Reason: Corrected the McMaster p/n
Old Feb 24, 2013, 03:56 PM
tailskid2 is offline
Find More Posts by tailskid2
Registered User
tailskid2's Avatar
Can they be purchased through a local store (if so which ones) or do you have to mail order them?
RCG Plus Member
Latest blog entry: GS TF Corsair hatch time
Old Feb 24, 2013, 04:34 PM
N1EDM is offline
Find More Posts by N1EDM
Registered User
N1EDM's Avatar
Sometimes they are carried by a dedicated woodworking store like Rockler, etc. Do you have any of those near you? If so, check that they carry the size that you're looking at.

Just my $.02

Bob
Old Feb 24, 2013, 04:40 PM
tailskid2 is offline
Find More Posts by tailskid2
Registered User
tailskid2's Avatar
I think we have a 'WoodsMaker' or something like that here in Phoenix...I bet they have them.....
RCG Plus Member
Latest blog entry: GS TF Corsair hatch time
Old Feb 24, 2013, 10:49 PM
kenh3497 is offline
Find More Posts by kenh3497
Just Another Brick in the Wall
kenh3497's Avatar
It might be worth mentioning I dove right in to my first hinging experience with my new tools on an airframe. It came out pretty good but I did miss the mark on a couple of holes. The second time all was good.

As with anything, a little practice makes for a better job. It might be prudent to waste a little balsa and install a couple of sets it some waste before doing the real thing.

Ken
RCG Plus Member
Old Feb 25, 2013, 09:21 AM
Patchitagain is offline
Find More Posts by Patchitagain
NE Texas, USA
Patchitagain's Avatar
HI Ken,

I've been looking for a tutorial such as this, many thanks... Just curious though, since these jigs align the holes in the center, which is fine for the ailerons, how would you create the holes for flaps ?

thanks,

Paul
Old Feb 25, 2013, 09:33 AM
kenh3497 is offline
Find More Posts by kenh3497
Just Another Brick in the Wall
kenh3497's Avatar
Quote:
Originally Posted by Patchitagain View Post
HI Ken,

I've been looking for a tutorial such as this, many thanks... Just curious though, since these jigs align the holes in the center, which is fine for the ailerons, how would you create the holes for flaps ?

thanks,

Paul
I assume you want the hinges to protrude from the bottom of the wing. I would make up a wooden drill jig to reproduce the angle you want. You could line the hole with a brass tube so the drill does not eat he wood away. The jig would need to have a "notch" to fit the back of the wing and the bottom at the same time. Matching the holes from surface to surface will be much trickier though. You might just wind up with drawing a lines across the parts at the hinge locations and doing the best you can. I would tape the flap to the wing and draw a line across the location where the hinge will be located. The nature of the beast may necessitate having the holes a tad sloppy so the hinges will align better. Take some extra time to align everything.

Thinking out loud here.... measure from the center of the hole in the jig to the outside of the jig. We'll say it's 3/8 of an inch just for arguments sake. Now measure off your hinge center line 3/8 of an inch. Align the edge of you drill jig to your off set line and you should have perfect hole alignment... At least in theory. Making a few test holes in some scrap would be a very wise thing to do to test your technique and drill jig.

Ken
RCG Plus Member
Last edited by kenh3497; Feb 26, 2013 at 11:06 PM.


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Question How to install hinges ? ? Patchitagain The Builders Workshop 17 Feb 15, 2013 06:40 AM
Question Robart "Hinge points". Mark Wood The Builders Workshop 26 Aug 28, 2007 07:12 PM
Robart small (1/8) hinge point plasmaman Aircraft - Electric - Airplanes (FS/W) 2 Feb 19, 2005 08:56 PM
Using Robart mini-hinge points on a foamy? coomarlin Foamies (Kits) 4 Jul 27, 2004 12:30 AM
Robart Hinge Points constantcrash Foamies (Kits) 2 Jul 08, 2004 08:47 AM