Copying Nuts and Studs.

This topic has 8 replies, 6 voices, and was last updated 20 June 2011 at 13:27 by Ian S C.

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16 June 2011 at 17:57 #70423
Colin Jacobs 1
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@colinjacobs1
I have a Petter A Stationary engine and need to make some nuts and studs to replace missing ones that keeps the cylinder head on. Other than the right hexagon bar I need to drill out the hole through squarely, then tap it to the right thread and with round bar I need to make a male fitting.

I guess I will need a tap and die set, sharp drills and a level bench drill?

I expect Mild steel rather than cast iron was used.

MTA

Colin
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16 June 2011 at 17:57 #5548
Colin Jacobs 1
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@colinjacobs1
16 June 2011 at 18:27 #70424
JasonB
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@jasonb
If you have a lathe available that will make the job a lot easier, the faces of the hex bar can be machined flat & true, a chamfer added to one face and the hole drilled true.

Depending on the thread size they could be screwcut on the lateh but suitable taps and a die will suffice, a tailstock die holder will be handy as well.

You can by whitworth nuts assumeing thats what the thread is.

Jason
16 June 2011 at 19:02 #70426
Colin Jacobs 1
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@colinjacobs1
i do not have a lathe just yet but know someone who has, thanks
16 June 2011 at 19:45 #70430
Keith Long
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@keithlong89920
Colin

It’s worth looking in Yellow pages to see if you’ve got a decent engineers suppliers near you. In the last 6 months I’ve bought 3/4 in. Whitworth nuts over the counter for little money, about 10p each I think, and I bought the number I wanted. No pressure to buy a box full. They even seemed amused that I was surprised that they stocked them, said it was a standard stock line that they kept, and this wasn’t some old fashioned iron mongers but a modern tool and sundries distributors selling to industry.

Keith
16 June 2011 at 20:33 #70433
Nicholas Farr
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@nicholasfarr14254
Posted by Keith Long on 16/06/2011 19:45:34:

Colin

It’s worth looking in Yellow pages to see if you’ve got a decent engineers suppliers near you. In the last 6 months I’ve bought 3/4 in. Whitworth nuts over the counter for little money, about 10p each I think, and I bought the number I wanted. No pressure to buy a box full. They even seemed amused that I was surprised that they stocked them, said it was a standard stock line that they kept, and this wasn’t some old fashioned iron mongers but a modern tool and sundries distributors selling to industry.

Keith

Hi, its no surprise that engineer suppliers have Whitworth nuts/bolts, or would be able to source them, especially if they are serving industry. Many of the machinery in Britain is older than most of us, and used Whitworth or BSF threads, which are integral to the machines, and so cannot be converted to metric easily, you just can’t scrap production plant for the want of the old British standard threads.

Whitworth and BSF may no longer be standard stock items for many suppliers, but they are still available.

Regards Nick.
16 June 2011 at 20:46 #70435
Colin Jacobs 1
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@colinjacobs1
Hi we have a fasteners in Lowestoft, will give them a look the bolts are 2.5 inches tall as they sit on the cylinder head.
19 June 2011 at 18:53 #70558
Speedy Builder5
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@speedybuilder5
In addition to C.Jacobs posting, if you visit his fastening shop, they can reccomend a local engineering workshop who will saw the head off High Tensile bolts and thread them to order – ie: make studs.
20 June 2011 at 13:27 #70583
Ian S C
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@iansc
Hi Colin, have you got an old nut from the engine? If so see if you can find someone who has some old style whitworth gear and see if you can match it, if you have to make new ones, make them look a little bit used, they may need a bit of rust pitting, or a corner spanner burred(don’t go over board), but just enough that no one knows which ones are new. I’v made new nuts and studs for a number of engines, Blackstone, Ruston Hornsby, Lanz Bulldog and a number of others, and I try to make them the same condition as the existing parts. New parts on old engines should look as if they are origional, and been there since new. Ian S C
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