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View Full Version : Turned Bolts?



keelan
10-18-2014, 05:23 PM
The last time I took a small job to the local machine shop, I was sorely disappointed with their work, and when I mentioned it to you fine folks, a number of y'all said "I could have made that properly for you for the same price!". With that said...

I buggered up a bolt on a printing press, and given that it's a 75 year old machine, a modern bolt from the hardware store just won't look right.

http://beefchicken.com/img/ppbolt.png

Material: whatever is on hand. This bolt holds up one end of a cast iron guard, there's very little stress on it... Except when I remove the guard and leave the bolt wound out and cycle the press. Then there's a lot of stress on it.

Anybody interested in making bolt? I'll gladly pay for time/materials/shipping.

keelan
10-18-2014, 10:04 PM
Looks like some folks over on PM thought of it before I did. Two offers, and I didn't even ask! :)

Axkiker
10-18-2014, 10:14 PM
So out of curiosity could you try to somehow age a store bought bolt to look old instead of trying to make a new hand made bolt look old. Just seems like it would be easier and cheaper.

lakeside53
10-18-2014, 10:21 PM
Or just get a 50 year old bolt from old machinery?

BigMike782
10-18-2014, 10:40 PM
And pics of the press.

KiddZimaHater
10-18-2014, 11:57 PM
Spray paint a modern bolt with rust-colored paint.

Mister ED
10-19-2014, 12:38 AM
So out of curiosity could you try to somehow age a store bought bolt to look old instead of trying to make a new hand made bolt look old. Just seems like it would be easier and cheaper.
The height of the bolt head is not the same. His old one is nearly .040 taller than a modern 5/16 bolt. Might not seam like it matters, but if he is trying to keep it original looking ... that is nearly a 20% difference in height.

dneufell
10-19-2014, 01:37 AM
"I was sorely disappointed with their work".......why?

keelan
10-19-2014, 01:41 AM
The height of the bolt head is not the same. His old one is nearly .040 taller than a modern 5/16 bolt. Might not seam like it matters, but if he is trying to keep it original looking ... that is nearly a 20% difference in height.

This is the reason. Also, modern bolts have grade marks on the head that I do not currently have the facilities to turn off, and the overall shape of the head lacks character. When you see a modern rolled-thread/swaged-head bolt next to its screw-machined ancestor, the differences become very obvious.

The press:

http://beefchicken.com/img_small/10x15-oct7.jpg

It's a 1939 Chandler & Price 10x15 Craftsman press. 2700 pounds of built-like-a-tank printing press.

keelan
10-19-2014, 01:47 AM
"I was sorely disappointed with their work".......why?

The part was a very simple sleeve. OD of a specific dimension, threaded 3/8-16. The finished part had a very poor finish (45 diagonal lines in the surface); clearly someone had spent far too long with either a file or sandpaper trying to achieve the final dimension, and the OD tapered off around .2" from either end. I should have rejected it, but I was being a wuss. If it happened again, I'd tell them to take it back for a do-over.

keelan
10-19-2014, 01:59 AM
I just realized that there's some good examples of the difference between modern bolts and old bolts already on my site. Take a look at this image:

http://beefchicken.com/img/october-18-2014-assembled1.jpg

It's gigantic, so hopefully your browser lets you zoom in and scroll around. Take a look at the bolt heads.

darryl
10-19-2014, 03:00 AM
I've seen bolts like that on outboard motors. Same size thread, various lengths.

PStechPaul
10-19-2014, 03:52 AM
You might try these sources:

http://www.fordscript.com/ford_bolts/catalogs/ford4953cat.pdf

http://www.snydersantiqueauto.com/modeltparts/BoltsBoltSets

You might be able to screw a nut on some allthread and weld it to look like a bolt.

It would probably be easy enough to turn it from hex rod and thread it, but you would need to describe the finish or show a good close-up picture.

90LX_Notch
10-19-2014, 10:06 AM
I have a 5/6-24 x 2.000 old bolt with patina and character. It has a 1.250 shoulder, therefore it can be cut and threaded 5/16-18 to your dimensions. If you can live with a .225 thick head instead of .240 it's yours.

-Bob

Willy
10-19-2014, 10:24 AM
Seek out a shop or source that specializes in antique car parts or restoration.
These types of thick headed bolts are very common on the older stuff, much like your press for instance.

The press by the way is a very fine piece judging by the photo, I'm not surprised you want to keep it period correct.

BigMike782
10-19-2014, 08:16 PM
Nice looking machine.
We had a Kluge in our high school shop along with a small hand operated proof press and a large manual press they used for die cutting once in a blue moon.

Arthur.Marks
10-19-2014, 08:31 PM
http://i771.photobucket.com/albums/xx357/Arrak_Thumrs/Widgets/custom%20screws/DSCN8245_zps62ade435.jpg (http://s771.photobucket.com/user/Arrak_Thumrs/media/Widgets/custom%20screws/DSCN8245_zps62ade435.jpg.html)

http://i771.photobucket.com/albums/xx357/Arrak_Thumrs/Widgets/custom%20screws/DSCN8246_zps51eb9714.jpg (http://s771.photobucket.com/user/Arrak_Thumrs/media/Widgets/custom%20screws/DSCN8246_zps51eb9714.jpg.html)

Black Forest
10-20-2014, 01:28 AM
Just change all the other bolts to modern bolts then the one bolt won't stand out! :cool: