Cutting flutted holes in visor

How do you cut the flutted holes in the Model A visor?

They looks awesome!!!!

Cheers !

Jay

 

By fluted, do you mean flared, like the holes in aircraft bracketry? Probably use a punch with the contour built in. Does any body know where do get these?

 

Here's one without the flare.
http://www.eastwoodco.com/jump.jsp?itemID=1461&itemType=PRODUCT

 

Mittler Bros has them, they work on a louver press.......OLDBEET

 

I've bought them here before...
http://www.lightracing.com/lightracingFlaredHoleDies.html

They were good quality, just took a few weeks to get.

Eric

 

If you have access to a lathe you could make a larger scale tool similar to this one.
Cut out the hole with a GreenLee punch or similar then flare.

This one is used to flare sheet metal for Dzus buttons.
1" OD 6061 T6 aluminum, 3/8" bolt & nut.
Cut the flare/countersink with a standard 82 degree countersink.
Leave a ledge as a stop.

Aluminum would probably work ok for a tool that's not used too often, but steel may be better.

The aluminum Dzus tool pictured is hanging in there pretty well after having flared quite a few holes.

You can make this with a drill press and hacksaw along with a little determination.

A stainless bolt and nut are shown, but they tend to gall after a while.
A black oxide bolt and nut are better and standard Cad-Iridited bolts and nuts work well.
A small drop of lube on the threads helps the black oxide stuff and the Cad stuff, but the stainless still tends to gall.

 

Here's something of interest...
http://www.lightracing.com/LightRacingTech/FlareHoleArticle_4x4Garage.pdf

 

I've heard them called "lightening holes" and you can make them with a "dimple die" or a "punch & flare tool".

Here are two sources:
www.vansantent.com
www.kartek.com

 

Also, Ron Fournier's "Metal Fabricator's Handbook"(?) has info on turning dimpling dies on a lathe.

 

Here is a place a friend of mine bought a set from,

http://www.mittlerbros.com/Punches.htm



CBB

 

Good info, fellers! Here's another good link I found when browsing those other ones:

How flared holes are made

Kinda reminds me of the stuff I found when I was researching homemade velocity stacks.

 

Here's the prices:
Flare Hole Die Prices

Part #

Size

Price​

​

15835

.75"​

29.95​

15840

1.0"​

39.95​

15850

1.5"​

69.95​

15860

2.0"​

99.95​

15865

2.5"​

109.95​

15870

3.0"​

179.95​

15875

3.5"​

219.95​

15880

4.0"​

269.95​

15885

5.0"​

349.95​

15890

6.0"​

429.95​

Sets


15810 .75"-2.5"

5pc.​

314.79​

15815 3", 3.5", 4"

3pc.​

602.86​

 

great info guys!!

Jay

 

MB has em that are a punch flare combo,, will do both operations at once. They have a 1/2" bolt that sqeezes them together, on need for a press.
Will do up to 16 ga steel. The one that is 2" diameter flares to just over 2 1/16" makes nifty gauge hole in the dash, punch them in and the guages are sunk in,, punch out and well ya get the point.

I'll try to get picture in the AM if interested

 

http://www.jalopyjournal.com/forum/showthread.php?t=125073

 

The tool is called a Belling-Tool, they are easy to make on a lathe. A friend of mine has built himself a full set of them in .25" incerments from .75" up to 3". They work great on sheet metal up to 18 gauge and Aluminum up to 1/8". For steel over 18 gauge a Belling-Tool in a press is needed.