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: Parting off|
Have a look at my article in MEW:N°268 & 269 (june and july 2018) "A switch off attachment for parting off safely"
|Thread: genius transmissions|
Videos for the quarantine:
|Thread: Griptru wil not ad just|
Read my article in MEW issue 292 about adjustable chucks, more will be said in the following issue about the tightening screws.
|Thread: Biax Power Scraper|
Have a look at the video: **LINK**
|Thread: Compression springs for the new year|
Bouncing forward in 2020 with compression springs!
Happy new year.
|Thread: Gear spec for threading dial|
Be careful as the number of divisions must be a submultiple of the number of teeth!
Note: the number of divisions on the disc must be a submultiple of the number of teeth.
20 teeth is possible with 4 divisions (5 teeth between divisions so 30mm) for the pitches submultiple of 30mm. 6 divisions for 30 teeth. The number of teeth (20 or 30) is determined by the TDI braket position.
20 teeth with 5 divisions for pitches sub of 24 (12, 8 and 4mm)
21 teeth is possible with 3 divisions (7 teeth between divisions so 42mm) for the pitches submultiple of 42. 6 divisions for 42 teeth.
22 teeth with 2 divisions for pitches sub of 66.
26 teeth with 2 divisions for pitches sub of 78.
I've written an article on the subject for ME but it's not yet published.
you can use a module 2 mm. 30 teeth for pitches submultiple of 10mm (5, 2.5, 1.25, 0.5mm); 42 teeth for pitches submultiple of 7 (3.5, 1.75).
|Thread: Gear Measuring|
As the sun gear is 10 teeth, there is certainly a positive addendum modification, and certainly also for the planet gears, These gears must so be cut with a generation machine, or a special drawing made for a fly cutter.
|Thread: Upside down reverse threading|
look at my video:
|Thread: L.A.Van Royen Twist Drills and their Grinding|
You can read my articles in MEW about drill sharpening (the Van Royen is discribed as conical clearance). Issues N° 245, 246, 247. Issue 251 for small drills, and issue 256 for web spitting. I'm still working on the subject for further articles.
|Thread: Snap rings for the new year|
Best engineering wishes for 2019 with the help of some snap rings!
|Thread: Cutting a keyway without a broach|
This process was also described in "post bag" in the january 2004 issue of ME.
|Thread: Knurling Tools|
Have a look at the article "machining shiny knurls" ME issues 4543 & 4545 (sept and oct 2016)
|Thread: collet wishes|
Happy new year and best wishes with the ER25 collet set!
|Thread: Ball Bearing Speed Reducer|
Now a mulltipliying spindle using the same mechanism.
Here is a blue print copy of a 1981 exam for driving a potentiometer.
|Thread: Machining Tungsten|
The DENAL density is 17.5 (19.3 for pure tungsten). The copper/tungsten alloy (used for EDM electrodes) density is only 14.
Surch for DENAL on the web it's an alloy 93% tungsten with iron nickel and cobalt I used it for making boring bars (for low vibration) it's machinable while tungsten is not, but you must use TC taps (I killed HSS ones in this stuff).
|Thread: Involute Gear : Pressure Angle|
What is fondamental for involute gears is the « base circle » . Visit my website: **LINK**
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