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Glanze Parting Blade - question

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mgj01/12/2009 21:23:41
1017 forum posts
14 photos
Ian perhaps you've never lived with a Myford!! they are a great little lathe, but when its your only one, sometimes you have to stretch it a bit, or you'll be hack sawing all night.
 
Like you, now I can get 40mm though the headstock, so I can invariably part off very close to chuck jaws - which as you suggested, is best practise.
 
Carbide is pretty good. You can work very happily IMO without a carbide turning tool, unless you start getting into some very special materials. But for parting, .....carbide is really really really nice.  Not essential of course. But really really nice, like worth paying a lot of money for a holder and tips nice. !
chris stephens01/12/2009 22:51:47
1049 forum posts
1 photos
Hi Meyrick,
I wonder how much of the benefit of carbide parting tips is due to the material and how much due to the clever geometry of the tip?
chriStephens
mgj01/12/2009 23:14:15
1017 forum posts
14 photos
Probably the geometry, and I suspect 4 elements are key
 
1 The way they fold up the swarf which keeps lubricant flowing to
2. A very small contact area.
3.They operate with very very little rake.
3. They are not that sharp.
 
So they don't jam with the swarf, and resist being drawn in - ie you HAVE to keep a positive load on to keep them cutting.
Ian S C02/12/2009 12:13:58
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7468 forum posts
230 photos
The new Myfords with the bigger mandrel will be a great help to those who can afford them,still a light lathe,but every little helps!I'v parted old half shafts with HSS after wrecking a bandsaw blade,slow back gear(60rpm)lots of suds,keep it cutting don't let it rub.I suppose carbibe would sail through.IAN S C
mgj02/12/2009 18:16:39
1017 forum posts
14 photos
Probably would, and if one were that particular, you can get special purpose tips for very hard materials.
 
As for the new Myfords - what is it £6.5k for a new one? Perhaps when I sell the house.
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