Needs Pictures: 0
Results 1 to 8 of 8
-
23rd Nov 2020, 09:43 PM #1Gear expert in training
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 1,075
Some of you make chips bigger than these gears...
Had to set up a hobbing job today for some tiny brass helical gears; 2 mm bore, 5.1mm OD, 3.5mm wide including shoulders, 15 teeth.
No fancy CNC, just a Swiss mechanical computer
PXL_20201123_045139613.jpg
Back end gear train; spindle speed on the right, indexing on the left
PXL_20201123_013340540.jpg
Front end gear train: basic feed on the right, differential feed for helicals on the left
PXL_20201123_043446917.jpg
5° 51'...or as close as I can figure it without a vernier scale. A few minutes either way on something like this isn't going to make much difference
PXL_20201123_012651196.jpg
It's a tight fit in there with the deburring tool
PXL_20201123_045114964.jpg
1 down, 2999 to go
PXL_20201123_045259976.jpg
And with some swarf from the lathe across the walkway for scale
PXL_20201123_045522522.jpg
-
23rd Nov 2020, 10:07 PM #2China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 1,656
You working for a watchmaker now!
-
23rd Nov 2020, 10:14 PM #3Gear expert in training
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 1,075
Not quite, but we are instrument makers so I suppose watches could fall under that
That's not even as small as we can go, I have a gear that we used to make for the old mechanical power meters; 2.4mm OD, 0.8mm bore, 10 teeth.
-
23rd Nov 2020, 11:26 PM #4
Hi Elan, Guys,
Just don't drop it on the floor you will never see it again !Best Regards:
Baron J.
-
23rd Nov 2020, 11:34 PM #5China
- Join Date
- Dec 2005
- Location
- South Australia
- Posts
- 1,656
Interesting when you see the tiny machines watchmakers use it is testament to the accuracy of those big machines and I the guess the bloke setting it up has a bit of input also.
-
24th Nov 2020, 09:36 AM #6Pink 10EE owner
- Join Date
- Aug 2008
- Location
- near Rockhampton
- Posts
- 6,216
-
24th Nov 2020, 11:05 AM #7
Hi Elan, nice work.
Seeing it certainly brings back memories of my dad.
On jobs like these, the first step is to fix the bottom of an apron to the base of the machine and the the loop around your neck.
My late father,a watchmaker had such a set up on his work bench.
If you don't have such insurance ,the miniscule part is almost guaranteed to leave your fingers and jump to where it can't be found.
The smaller the part is, the greater the chance of it taking an unplanned trip to the floor. Don't ask me how I know.
Grahame
-
24th Nov 2020, 05:45 PM #8Gear expert in training
- Join Date
- Aug 2008
- Location
- Melbourne
- Age
- 34
- Posts
- 1,075
Mikron (the manufacturer of most of our small hobbing machines) was actually started by a watchmaker specifically for the watch industry. It's quite amazing that, once warmed up, these machines will stay within 5-10 microns all day, even 50+ years after being built, and all without a single computer chip. We even have a couple of electro-hydraulic hobbers from them that are able to run totally automatically, including load/unload, with nothing but micro-switches and solenoids. Well, they would if we had all the parts...
Similar Threads
-
Bigger -better
By morrisman in forum METALWORK GENERALReplies: 1Last Post: 18th Nov 2014, 10:58 PM -
Two thou bigger at one end !
By BaronJ in forum METALWORK GENERALReplies: 38Last Post: 15th Feb 2014, 09:44 AM -
Mills and chips
By Michael G in forum METALWORK GENERALReplies: 4Last Post: 28th Jan 2012, 09:37 PM -
Cheap As Chips Welding Gloves
By matthew_g in forum WELDINGReplies: 12Last Post: 9th Sep 2010, 11:49 PM -
Red hot chips off lathe
By Tiger in forum METALWORK GENERALReplies: 9Last Post: 18th May 2010, 10:49 PM