Cylinder head stud material?
Dalton
going to get stuck with one of the Titanium alloys :( Most studs
commercially available are rolled and hence have a degree of hardening by
nature of the process)....sorry if I'm teaching granny to suck eggs :)
cheers Dee
"timleech" <timl...@dutondok.u-net.com> wrote in message
news:sl0p9voguds938hm7...@4ax.com...
> I've been asked to make a small batch of head studs for a Lister JP3
> (9/16" BSF), any recommendations on materials? And where might I get
> it in that diameter? I have the impression the originals aren't mild
> steel, though I suspect for the duty involved, mild steel might live
> for a reasonable time.
>
> Thanks
> Tim
>
>
> Tim Leech
> Dutton Dry-Dock
>
> Traditional & Modern canal craft repairs
Jonathan Barnes
rolled threads and correct heat treatment will give bolts with significantly
better strength and fatigue resistance than a lath cut thread.
If the bolts do more than hold on the covers I would be very wary of
supplying replacements.
--
Jonathan
Barnes's theorem; for every foolproof device
there is a fool greater than the proof.
To reply remove AT
Peter A Forbes
We had a discussion with David Harris some years ago now about the cylinder head
stud torque figures for the Lister engines, and they were pretty low. I made a
table out of the stuff that David gave me (based on a typewritten sheet of
figures) from Lister's own service dept., and they are on our web pages at:-
http://www.oldengine.org/members/diesel/Rrchapt8.htm
The figures are 100lb ft for 9/16" BSW and 80-85lb ft for 9/16" BSF, not hugely
stressful for a stud of that size.
Peter
--
Peter & Rita Forbes
die...@easynet.co.uk
Engine pages for preservation info:
http://www.oldengine.org/members/diesel
John Manders
"Dalton" <Da...@notavailable.com> wrote in message
news:b7i198$3tf$1...@news6.svr.pol.co.uk...
for the stock material. There are a number of (now specialist) suppliers of
BSF bolts. Many of these can make specials to order. Have you thought about
subcontracting? I have had good service from Wye Valley Supplies on 01597
860464. I have no connection etc. The mans name is Kevin Hills. I don't
think he can roll threads but can cut them in batch quantities.
John
John
Andy Dingley
wrote:
>EN8 should be ok so long as your not dealing with massive pressure or your
>going to get stuck with one of the Titanium alloys :(
_Never_ use titanium for head studs ! Or anything with a thread on
it.
It's damn near impossible to cut a decent thread on Ti, and then when
you have managed it, you find that the worst bit is yet to come.
There's nothing like Ti for galling and sticking in place like a
Jaguar head full or Araldite.
I love the metal, but threads and Ti just don't go together.
Dalton
strong :)I agree that Ti is a bitch to work with but sometimes there are few
options if you need the tensile strength.
cheers Dee
"Andy Dingley" <din...@codesmiths.com> wrote in message
news:4cdq9vkifj54n2007...@4ax.com...
Malcolm Stewart
news:sl0p9voguds938hm7...@4ax.com...
> I've been asked to make a small batch of head studs for a Lister JP3
> (9/16" BSF), any recommendations on materials? And where might I get
> it in that diameter? I have the impression the originals aren't mild
> steel, though I suspect for the duty involved, mild steel might live
> for a reasonable time.
>
> Thanks
> Tim
> Tim Leech
Quite an interesting thread. Assuming that you do need high tensile steel for
the part, how do you ensure that what you're getting is any good? Not that long
ago we had problems at work with very under strength steel sourced from China,
and subsequently found in a wide-ranging investigation that virtually all steel
not sourced from an avionics controlled route was sub-standard.
What's the position today?
--
M Stewart - retired safety engineer
Milton Keynes, UK
Peter A Forbes
That's the problem with so-called ISO / BS Standards, you can sell crap as long
as you document it !
Purchasing steel from someone like Macreadys should be safe, as with Parker
Steels and other major suppliers who have a reputation to protect and also have
the facilities to check samples of material they are selling.
You will notice that huge quantities of material and parts are now sold by the
likes of RS Components that are manufactured in China, but still carry the
UK-made pricing, so a big hike in margins. Bussman fuses for example are sold in
packs marked 'Made in China' but are still priced the same as they were before
when they were US or UK made.
We found the same thing in the US on our last visit.
Peter A Forbes
wrote:
>On Fri, 18 Apr 2003 10:39:51 +0100, John Stevenson
><jo...@stevenson-engineers.co.uk> wrote:
>
>>On Tue, 15 Apr 2003 23:13:41 +0100, timleech <timl...@dutondok.u-net.com>
>>wrote:
>>
>>>I've been asked to make a small batch of head studs for a Lister JP3
>>>(9/16" BSF), any recommendations on materials? And where might I get
>>>it in that diameter? I have the impression the originals aren't mild
>>>steel, though I suspect for the duty involved, mild steel might live
>>>for a reasonable time.
>>>
>>>Thanks
>>>Tim
>>>
>>>
>>>Tim Leech
>>>Dutton Dry-Dock
>>>
>>>Traditional & Modern canal craft repairs
>>
>>Bit late now but the Leyland 680 engine has 9/16" BSF head studs.
>>Studs are about 6" long but there are 4 longer ones, about 8" for the
>>rocker box bolts.
>>---
>
>Not long enough John! These need to be 11" o/a.
>
>Cheers
>Tim
Nice old lump to work on, the 0-680, we had a relatively rare turbo engine on a
genset when I was in the film game, but spares were a nightmare once Leyland got
into the BMC empire (by design) and the trucks were orphaned.
John Stevenson
wrote:
>>>
>>>Bit late now but the Leyland 680 engine has 9/16" BSF head studs.
>>>Studs are about 6" long but there are 4 longer ones, about 8" for the
>>>rocker box bolts.
>>>---
>>
>>Not long enough John! These need to be 11" o/a.
>>
>>Cheers
>>Tim
>
>Nice old lump to work on, the 0-680, we had a relatively rare turbo engine on a
>genset when I was in the film game, but spares were a nightmare once Leyland got
>into the BMC empire (by design) and the trucks were orphaned.
>
>Peter
Peter,
The 680 is still alive and well and living in Clogland.
Spares have never been a problem as the 680 is still being used in bus
chassis to this day.
The DAF truck engines is derived from the 680 and is that close that many
of the spares are still current and interchangeable.
Around about 1968/9 I was working for a company called R Cripps and Co.
They were big plant dealers, one of our contracts was to look after the
Scammell dump trucks for North Notts Coal Board [ RIP ] These were powered
by 680's.
At the same time Cripps installed one of the first stock computers, their
computer then told them they were over stocked on certain 'obsolete' parts.
Instead of just working off stock and not replacing they decided to dump
all the spares.
Permission was obtained from the Coal Board to dump this down Pleasley B
shaft which was being filled in.
I spent three days doing nothing but run from Nottingham to Pleasley with
an A60 van full of spares and dump them.
Amongst this stuff were pistons and liners, complete clutches, valves,
power steering pumps, bearings etc, - all off 680 engines.
Parts which incidently are current to this day.
Another employee, Jim Smith spent three days doing nothing but dump
hydraulic hoses by the van full.
---
Regards
John Stevenson
Nottingham, England
J. K. Siddorn
> Instead of just working off stock and not replacing they decided to dump
> all the spares.
> Permission was obtained from the Coal Board to dump this down Pleasley B
> shaft which was being filled in.
>>>>>>>>>>>>>>>>>>>
There seems to have been a lot of this. Some years ago, a chap came to see
me about Merlins and we had a very pleasant evening swapping engineering
stories. It seems that in the late 1940's, the RAF had an embarrassment of
Merlins that had long since been paid for and subsequently written off in a
financial sense. They were just taking up space, but no-one was prepared to
sell them for scrap, so they were unceremoniously tipped down a disused mine
shaft when the RAF base was closed.
No, I don't know which one and my informant was also less than forthcoming
about the location as one might reasonably expect, but thought he had a lien
on the general whereabouts and was looking into buying the plot.
Probably apothecial, but a nice thought ...................
Regards,
Kim Siddorn