Any ideas what these are?

This topic has 18 replies, 11 voices, and was last updated 5 June 2015 at 17:24 by Bowber.

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2 June 2015 at 09:39 #192063
Chris Denton
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@chrisdenton53037
These were in a box of stuff I got at a car boot sale yesterday.

They are marked Deloro Stellite and then an imperial size.

Thanks.

[img]http://s10.postimg.org/ebprw0lg9/image.jpg[/img]

[img]http://s10.postimg.org/s446rnc7t/image.jpg[/img]

Edited By Chris Denton on 02/06/2015 09:40:58
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2 June 2015 at 09:39 #23920
Chris Denton
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@chrisdenton53037
2 June 2015 at 09:42 #192064
Chris Denton
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@chrisdenton53037
2 June 2015 at 09:43 #192065
Chris Denton
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@chrisdenton53037
2 June 2015 at 09:43 #192066
Muzzer
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@muzzer
First link

Second link
2 June 2015 at 10:00 #192067
Ajohnw
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@ajohnw51620
I suspect they are stellite drills. They can be used to drill hardened material and are said to work best when they get red hot. I've never used one hence said but it makes sense. I did see some stellite tool bits some time ago. Rather expensive.

John

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2 June 2015 at 10:00 #192068
Vic
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@vic
Reamers perhaps?
2 June 2015 at 10:04 #192069
Ajohnw
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@ajohnw51620
Buck and Hickman sell them

**LINK**

John

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2 June 2015 at 10:39 #192073
colin hawes
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@colinhawes85982
They are stellite drills used for drilling hardened steel even HSS steel.These drills are used in a drilling machine at a high speed and with considerable pressure and they rely on friction causing the job to get red hot locally so the drill can penetrate. I believe that stellite doesn't exist in a soft state so the heat has little effect on it Before tungsten carbide became available it was the most practicable way to get through a case hardened part to prepare the way for a drill. Now obsolete with modern tools. Colin
2 June 2015 at 12:17 #192084
Ajohnw
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@ajohnw51620
I'm not so sure about them being obsolete. There are variations on the same theme such as this one

**LINK**

I understand this one can only be ground with diamond. Its' fairly easy to buy Stellite tool bits and drills so I'd guess it still has it's applications. Trouble is that even a 5/16 tool bit works out expensive. I have no idea how expensive the tantung stuff is.

John

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2 June 2015 at 13:48 #192097
Rik Shaw
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@rikshaw
You don't need diamond to grind stellite.

Rik
2 June 2015 at 14:32 #192104
mark costello 1
Participant
@markcostello1
If anyone has some toolbits and wants to grind them on a surface grinder, they better remember they are non-magnetic. Almost found out the hard way.
2 June 2015 at 15:01 #192109
Ajohnw
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@ajohnw51620
I came across an amateur web site some time ago run by a person who loved stellite lathe tools. It was at the tail end of times when cheaper used machine tool and junk dealers had bins of used tool bits. He used to search through them with a magnet. The site was all good advice elsewhere so I have always had a hankering to try some. £27 for a 5/16 tool bit is a bit off putting though.

The comment about Tantung G and diamonds is just a comment off the web. True / False pass.

John

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Edited By John W1 on 02/06/2015 15:02:14
2 June 2015 at 15:14 #192111
Russell Eberhardt
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@russelleberhardt48058
Didn't Stellite used to be used to hard face valves in old sports car engines?

Russell.
2 June 2015 at 16:10 #192119
Oompa Lumpa
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@oompalumpa34302
Posted by Russell Eberhardt on 02/06/2015 15:14:06:

Didn't Stellite used to be used to hard face valves in old sports car engines?

Russell.

Yus. You are quite right, sodium filled valves too.

graham.
2 June 2015 at 16:28 #192121
colin hawes
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@colinhawes85982
I don't think there is any advantage at all in using Stellite for lathe tools as HSS is more than adequate for most work and carbide is best for cast iron. I use silver steel for small boring bars. Colin
5 June 2015 at 14:52 #192499
Chris Denton
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@chrisdenton53037
Thanks for that.

Interesting.

I may try them!
5 June 2015 at 15:52 #192507
S.D.L.
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@s-d-l
Posted by colin hawes on 02/06/2015 16:28:45:

I don't think there is any advantage at all in using Stellite for lathe tools as HSS is more than adequate for most work and carbide is best for cast iron. I use silver steel for small boring bars. Colin

Eccentric Engineering the makers of the diamond tool holders seem to think that class of material has its merits in model engineering as they have just started selling a similar material. see link below

**LINK**

Steve
5 June 2015 at 17:24 #192525
Bowber
Participant
@bowber
Used them and it can be quite entertaining, don't have anything flammable near by if you do use them.

I also used to use Stellite to face steel shoes for speedway and grasstrack, goes on nicely once you get the knack.

Steve
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