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Member postings for jacques maurel

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

Thread: Ball bearings for 2016
02/01/2016 14:59:16

Happy new year with ball bearings for 2016

bonne annee 2016 petit.jpg

Thread: Tumble deburring
10/09/2015 07:10:10

Look at the article: "The rumbling tumbler" in the Nov/Dec 1994 issue of MEW.

J Maurel

Thread: Cylinder Honing Tool
28/08/2015 15:51:56

Hello

You'll soon dicover that honing is boring, so why not try boring instead of?

J Maurel

Thread: WOW moments
28/08/2015 15:48:14

I had seen a wonderful rainbow in Geneva, the end of the rainbow was in bank! certainly there was a pot of gold there but unfortunately I had'nt any access to the safe and haven't seen it, sorry.

Jacques

Thread: New Free Plan - Jeclanide Handwheel
02/08/2015 18:21:20

Look at my video on Youtube: **LINK**

J Maurel

Thread: identifying brass from bronze
14/01/2015 08:40:29

I think the best way is to measure the density: weight the piece, put it in a graduated bowl half filled with water to know the volume, divide the weight by the volume, compare the result with the one for a brass sample. Brass density is lower than bronze one as brass is usually copper with about 40% zinc while bronze is copper with about 10% tin, zinc and tin having almost the same density.
J Maurel

Thread: milling cutters for 2015
01/01/2015 08:28:34

Happy new year with milling cutters for 2015

bonne année 2015-e.jpg

Thread: polishing spindle taper threads
01/09/2014 21:54:50

Look at this video:http://www.youtube.com/watch?v=I57FCsvUajg

Thread: Identifying brass from bronze
24/01/2014 17:43:30

Find the density (weight devided by volume), brass has the lower density because brass contains about 30 to 40% zinc and bronze about 10% tin, zinc and tin having almost the same density.

J Maurel

Thread: Taps and dies for the new year.
03/01/2014 08:33:20

bonne année 2014 u.jpg

Thread: screw cutting made easy
02/11/2013 09:04:24

You'll find a near relative of the snap tap in ME issue N°4177 (sept 2002) title: A high speed thread striking attachment. The problem is : what happens if the feeding force is more than the spring one?

J Maurel

24/10/2013 10:24:20

 The problem with this tool (15° rake angle) is that it must be of the spring type for the tool not to plunge in the work as the chip is very wide for the last cuts.

J Maurel

Edited By John Stevenson on 20/10/2014 22:47:10

Thread: Ted McDuffie's 'Variable Lead Threading Attachment'
24/10/2013 10:17:48

I've made a taper turning attachment "all contained in a tooholder"; making a morse taper with it is almost as easy as making a cylinder (very quick set up). you'll know it as soon as some magazine would want to publish it. Don't be too optimistic as I've 7 (seven!) articles waiting in ME or MEW stock since 2006 with no publication, why should I write a new one.

J Maurel

Thread: screw cutting made easy
22/10/2013 14:48:41

A near relative of the "Snap-tap" attachment has been descrtbed in "Model Engineer" (no photo, only sketches). Try to find in which issue!

J Maurel

18/09/2013 15:07:08

New video showing the home made attachment at work : **LINK**

Thread: threading metric on an imperial lathe
02/08/2013 15:35:33

For cutting short threads, with no new gear, go to: **LINK**

regards.

J Maurel

Thread: Cutting Gears
28/07/2013 15:20:31

For cutting short threads, with no new gear, go to: **LINK**

regards.

J Maurel

Thread: A variable Lead threading attachment. Author Ted McDuffie
09/07/2013 17:08:22

Here is a link to my website, I've gathered some informations on the attachment and there is a drawing and a photo showing a threading machine from the eighteenth century using the same principle: **LINK**

J Maurel

07/07/2013 18:53:12

I've made a short video showing the attachment at work: cutting a 3/4" BSP thread (14TPI) on a metric lathe (actual lead 1.5mm).

**LINK**

J Maurel

18/06/2013 14:06:09

I've made a sofware simulation using Solidworks and the kinematics application motionworks, with the example already given (20 tpi from 1mm standard lead) the error for 90 mm thread length machined is about 0.004mm, less than the lead screw tolerance!

J Maurel

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