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Member postings for david gregg

Here is a list of all the postings david gregg has made in our forums. Click on a thread name to jump to the thread.

Thread: heat treatment oven
03/11/2010 22:05:41
Ihave a Gallenkamp FR520 heat treatment oven  and I require a pyrometer  I have tried the company who have taken over Gallenkamp but all they can tell is that this is an old model which is out of production ,I have also tried an add in scribe a line but with no success , has anybody  out there any suggestions where Ican obtain parts  or how Ican control the oven temperature
Thread: Coventry Diehead
04/07/2009 22:05:32
iIf you are using a diehead can you tell me how the dies should be fitted The dies are all numbered so they must go in  the proper order , Do you fit them going clockwise or anti clockwise  in the diehead 
Thread: Taper cutting
04/07/2009 21:22:54
 I dont know what size of lathe you are using  ,but one of my lathes is a  Harrision 300 and to m/c a morse taper 4 I would set the compound slide to the correct angle . In my opinion you should  not ofset the tailstock by the amount needed to m/c this taper ,the tailstock should only be used for very slow tapers . When you ofset the tailstock by this amount the tailstoct centre and the headstock centre do not locate properly in the cenre hole in the workpiece hence your problem with chatter . If you project aline through the headstock and another through the ofset tailstock  and then draw a line through the centre line of the workpiece you should see what I mean .  I hope this makes sense  if not come back  and and I will try again .
Thread: acid pickle
24/06/2009 22:34:24
 Does it have to be sulphuric acid   .Hydrocloric acid is available in farm supply shops ,it is used as a steralising agent in the dairy industry ,i dont know what the contretation rate is It costs approx  £ 14  for 20 litres           
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