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Post by builder01 on Dec 17, 2018 21:32:12 GMT
I got my laser cut parts from Malcolm. I have no idea if there is any protective oil treatment or not. In any case, you usually machine these pieces on all sides and all surfaces will be removed to a certain degree anyway. Even if these parts do no need to be annealed, it certainly makes cutting through the laser cut edge with HSS much easier. Here's an example of two parts from Malcolm, as received, and then after being completely machined:  DSCN0778 - reduced by Builder16, on Flickr |
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Post by Deleted on Dec 17, 2018 21:49:25 GMT
Malcolm's products are superb aren't they?, in regards to the laser cut edge I just followed Malcolm's advice to use a grinding wheel or such to grind the tough bits off. I found a sanding drum in a Dremel was more than good enough to remove the hard edge and the drum wheel shape made life easy and avoided any gouging.
Cheers
Pete
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JonL
Elder Statesman
WWSME (Wiltshire)
Posts: 2,906
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Post by JonL on Dec 17, 2018 22:29:51 GMT
Yes Greenglade these are from Malcolm. Like everything in my shed they are covered in duck oil!
I suspect my annealing was overkill but better too much effort than not enough I guess.
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kipford
Statesman
Building a Don Young 5" Gauge Aspinall Class 27
Posts: 566 
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Post by kipford on Dec 17, 2018 22:59:20 GMT
Malcolm told me he uses S295 steel, I think it is actually E295, which is a general hot rolled, unpickled steel. Certainly the parts I have from him are not cold rolled, neither do they appears oiled.
Dave
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Post by delaplume on Dec 17, 2018 23:04:39 GMT
Malcolm's products are superb aren't they?, in regards to the laser cut edge I just followed Malcolm's advice to use a grinding wheel or such to grind the tough bits off. I found a sanding drum in a Dremel was more than good enough to remove the hard edge and the drum wheel shape made life easy and avoided any gouging. Cheers Pete or a flap wheel for general cleaning ?? |
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Post by delaplume on Dec 17, 2018 23:21:30 GMT
Yes---- a great deal of the mass-produced items for The Bear are from Malcolm's workshop.........and good job he does too !!
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Post by Deleted on Dec 18, 2018 1:00:42 GMT
Malcolm told me he uses S295 steel, I think it is actually E295, which is a general hot rolled, unpickled steel. Certainly the parts I have from him are not cold rolled, neither do they appears oiled. Dave Yes, Dave...that is why I suggested asking Malcolm what these particular rod blanks are made off. Mine when bought some years ago were stated as HRPO, listed as such on the large list of parts for Doncaster, those listed today are not, I can only assume it has something to do with cost. I did discuss this with Malcolm a couple of years ago when I first noticed...I was just checking in case there had been problems reported by other builders of the loco which forced the change. This was not the case and so I used the blanks originally supplied, I have to say the material is superb for the job in hand Regards Pete |
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