15mm and 7/16″ diameter HSS tool steel bar

[Adam HarrisParticipant @adamharris13683]

Andrew I think the MIG welder will come out from the bottom shelf for this then

[Paul LousickParticipant @paullousick59116]

Brazing and silver soldering would be difficult with a MIG welder. You only need a gas torch to silver solder.

Paul

[JohnFParticipant @johnf59703]

Adam, Mild steel is not a particularly good material to make your boring bars from, better to choose something tougher say EN8, EN19 or EN24T. Silver steel is OK but not great either IMO, personally I use EN24T and it works well.

John

[Adam HarrisParticipant @adamharris13683]

Not bad Duncan. Thanks

[Adam HarrisParticipant @adamharris13683]

Andrew/Paul, when talking Silver Soldering do you mean the cheap Aluminium Alloy rods used with a gas canister blow torch? Or are you talking about Silver-Flo and if so which one?

[JasonBModerator @jasonb]

I use this set of indexable holders made for boring heads 90% of the time.

Some Banggood can be questionable but most of our suppliers have something between the two extreams that Duncan has shown.

[Paul KempParticipant @paulkemp46892]

Posted by Adam Harris on 10/03/2019 01:02:55:

Andrew/Paul, when talking Silver Soldering do you mean the cheap Aluminium Alloy rods used with a gas canister blow torch? Or are you talking about Silver-Flo and if so which one?

Adam,

No not aluminium, silver solder. I have various grades kicking around the shed, a fair bit of the old easy flo No2 which apparently you are not supposed to use these days because of the Cadmium content. Also have some Cup alloys 434 and Johnson Mathey silver flo. Any of them will do pretty well. Use a high temp flux like Tenacity No 5 or I would think Cup HT5. For small jobs you can get away with the hand held DIY self contained torch with integral cylinder if you can arrange some fire bricks to concentrate / conserve the heat.

Paul.

[John RuddParticipant @johnrudd16576]

Posted by Pete White on 09/03/2019 20:31:16:

Posted by Paul Kemp on 09/03/2019 20:06:12:

First rate common sense to me, work just the same. As mentioned noring away at a 15mm chunk of hss doesnt appeal to me either

Apart from wearing away the grinding stone…

[John Paton 1Participant @johnpaton1]

Adam – I have sent you a PM

John

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