Ian P | 23/02/2017 15:35:31 |
![]() 2747 forum posts 123 photos | Oops! I have now seen page 6 of the PDF and all has become clear! Please ignore my request for a picture. Ian P |
Gary Wooding | 23/02/2017 15:49:56 |
1074 forum posts 290 photos | The A and B views are not isometric, they are views perpendicular to the faces.The dotted red squares show the horizontal/vertical limits of the faces and pass through the corners of the faces. The dotted grey lines show what you could see if the block was transparent. |
Fowlers Fury | 23/02/2017 23:19:13 |
![]() 446 forum posts 88 photos | Garry Wooding wrote:- "After breaking several #76 drills I used a high power loupe to examine the one remaining and was appalled to see how badly it had been sharpened. Since the broken drills had come from the same supplier......." Another source of badly sharpened and therefore badly performing drills are those orange & blue plastic boxes of very small drills on sale at exhibitions. I took a new No.70 drill from such a box and put it under the microscope at x200. The image is poor because of the very small depth of field and getting good top illumination but one wonders just how such drills are "sharpened". It's also revealing to compare cutting edges of carbide inserts at that magnification. For example those of cheap Far Eastern origin to say, manufacturers such as Iscar. Once seen at x200 the obvious difference in performance (and price) is explained. |
Howard Lewis | 25/02/2017 18:48:50 |
7227 forum posts 21 photos | For some reason, my system will only download page 1. After that "There is a problem" Any ideas, please? Howard |
MW | 25/02/2017 18:55:05 |
![]() 2052 forum posts 56 photos | Posted by Fowlers Fury on 23/02/2017 23:19:13:
Garry Wooding wrote:- "After breaking several #76 drills I used a high power loupe to examine the one remaining and was appalled to see how badly it had been sharpened. Since the broken drills had come from the same supplier......." Another source of badly sharpened and therefore badly performing drills are those orange & blue plastic boxes of very small drills on sale at exhibitions. I took a new No.70 drill from such a box and put it under the microscope at x200. The image is poor because of the very small depth of field and getting good top illumination but one wonders just how such drills are "sharpened". It's also revealing to compare cutting edges of carbide inserts at that magnification. For example those of cheap Far Eastern origin to say, manufacturers such as Iscar. Once seen at x200 the obvious difference in performance (and price) is explained.
It's no wonder they break so readily when you would need to use more pressure just to get it cutting. Michael W |
Howard Lewis | 25/02/2017 20:01:43 |
7227 forum posts 21 photos | SORTED! The PC would display the PDF, but not download it fully. Managed to print it, and then I spotted a "Save As" button , Lo and Behold it down loaded.! Rename and ready for another print when the first gets covered in greasy handprints, as it surely will. Must be something to do with old dogs and new tricks. Howard |
Neil Wyatt | 25/02/2017 20:47:12 |
![]() 19226 forum posts 749 photos 86 articles | Don't assume all those 'microboxes' are from the same factory. I have one (Proops IIRC) and the drills in it work like a dream. Same with Chinese inserts, you can get any quality you like, but be prepared to pay. Neil |
Simon Collier | 25/02/2017 21:56:37 |
![]() 525 forum posts 65 photos | I am having a lot of trouble with this PDF too. I can download it and look at it, but Print Preview will only give me half of page 1. It downloads as a folder, not a simple PDF file. Any suggestions? |
Gary Wooding | 26/02/2017 07:43:36 |
1074 forum posts 290 photos | When you click the link you should get a screen like the one in the screenshot. Click the Download button and choose the Open with option to view the the PDF in your normal PDF viewer (probably Acrobat Reader). You can then save and/or print it with that. |
Simon Collier | 26/02/2017 10:36:50 |
![]() 525 forum posts 65 photos | Thank you Garry. That worked. It is not a procedure I have ever used before. I will print it out and study at leisure. I do have Derek Brown's injector book which has his jig in it. |
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