By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

4 facet drill sharpening jig plans

All Topics | Latest Posts

Search for:  in Thread Title in  
Ian P23/02/2017 15:35:31
avatar
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 Wooding23/02/2017 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 Fury23/02/2017 23:19:13
avatar
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.

no70 x200.jpg

Howard Lewis25/02/2017 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

MW25/02/2017 18:55:05
avatar
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 Lewis25/02/2017 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 Wyatt25/02/2017 20:47:12
avatar
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 Collier25/02/2017 21:56:37
avatar
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 Wooding26/02/2017 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.

downld pdf.jpg

Simon Collier26/02/2017 10:36:50
avatar
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.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Sign up to our Newsletter

Sign up to our newsletter and get a free digital issue.

You can unsubscribe at anytime. View our privacy policy at www.mortons.co.uk/privacy

Latest Forum Posts
Support Our Partners
cowells
Sarik
MERIDIENNE EXHIBITIONS LTD
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest

 

Donate

donate