Needs Pictures: 0
Picture(s) thanks: 0
Results 46 to 60 of 69
-
10th April 2014, 10:53 PM #46Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
Not much work has been happening on the restoring the actual machine lately as it is now useable and has done a few small surface grinding jobs. All that I really have to do now is finish painting it , wire up the push buttons for the electric clutch and fit a work light.
I have been working on new grinding wheel adaptors to hold different thickness and diameter wheels as the machine only came with 1 adaptor,which has a right hand thread that could tend to work loose in use, so the new ones are left hand thread.
DSC00966.jpgDSC00962.jpgDSC00963.jpgDSC00964.jpgDSC00965.jpg
-
10th April 2014 10:53 PM # ADSGoogle Adsense Advertisement
- Join Date
- Always
- Location
- Advertising world
- Posts
- Many
-
11th April 2014, 09:53 PM #47Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
I left out a few details about the wheel adaptors in the previous post while working out how to post the pictures. The pictures show a very accurate method for checking a small internal taper using gauge balls and a few simple measurements followed by a bit of trig.
The taper is 3 inches per foot or 14.250 degrees included angle.
This is the fixture I made for holding the adaptors while screwcutting, boring and grinding the taper.
DSC00959.jpg
A short video of grinding the internal taper
-
11th April 2014, 10:57 PM #48Distracted Member
- Join Date
- May 2010
- Location
- Lower Lakes SA
- Age
- 59
- Posts
- 2,557
Thanks Techo, I was hoping you would elaborate on that, as I need to make some for my TCG.
But I can't view the video. I get the photobucket page with an empty box where the movie should be.
-
11th April 2014, 11:40 PM #49Cheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
-
28th April 2014, 11:36 PM #50Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
Lately I have been working on flanges for the grinding wheel adaptors, these are 1.250" x 16tpi left hand internal thread. I decided to set up my little Hercus Compulathe to cut the threads as I want to make a few of these but I had a little trouble working out which Canned Cycle to use, being L/Hand internal, in the end I basically programmed it as an external R/Hand with slight modifications. It turned out very well as can be seen in the short, low quality video.
Lex.
https://www.youtube.com/watch?v=m1TK...are_video_user
DSC00983.jpgDSC00984.jpg
-
12th June 2014, 11:51 PM #51Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
I need to make a new bronze nut for the cross slide screw as the original has about .070" backlash. This screw is 7/8" diameter x 1/8" pitch Acme, 2 start left hand, so making a new nut is going to be a little tricky.
I have been doing a few trial runs internally screw cutting some scrap brass on the little Hercus CNC lathe before tackling the actual bronze nut so I will post some pictures and a video of cutting the nut in the next few days.
-
15th June 2014, 12:23 PM #52Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
This is a link to a video of the screwcutting operation on a brass test piece., the little machine handled the coarse lead very well, even better than I had expected.
https://www.youtube.com/watch?v=aiXidAxbksc
-
15th June 2014, 10:53 PM #53Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
It was hard to see the actual threads in the video and the first picture here is not much better but I can say that the tool cut very cleanly. The tool is just a piece of a broken #2 centre drill ground to Acme form but most importantly it has the correct leading edge geometry to allow for the high lead angle.
Lex.
DSC01037.jpgDSC01038.jpgDSC01052.jpg
-
25th June 2014, 11:39 PM #54Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
A couple of shots of the new bronze cross slide nut blank being prepared before internal screw cutting.
DSC01084.jpgDSC01086.jpg
-
29th June 2014, 10:48 PM #55Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
The finished nut is now in the machine and it is much better to use with only around .005" backlash as opposed to .070" with the old one. I made a fixture to hold the nut for screw cutting because I didn't want to risk it moving in the small 3 jaw chuck.
DSC01099.jpgDSC01101.jpg
-
26th January 2015, 11:31 AM #56Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
After a long delay I now have 2 new grinding wheel adaptors and some spare flanges, which are easy to make, compared to the actual adaptors. I will get around to making some more adaptors in the future but I have enough to get by at the moment.
DSC01307.jpg
The wheel assembly on the lower left of the picture shows the wheel adaptor that came with the machine, it has right hand threads so requires extra care when in use.
-
26th January 2015, 10:12 PM #57Philomath in training
- Join Date
- Oct 2011
- Location
- Adelaide
- Age
- 59
- Posts
- 3,149
-
27th January 2015, 10:09 AM #58Senior Member
- Join Date
- Sep 2008
- Location
- Riddells Creek
- Posts
- 300
-
28th January 2015, 11:31 AM #59GOLD MEMBER
- Join Date
- Aug 2011
- Location
- Melbourne
- Posts
- 2,951
Nice work. Been watching for a while now. I like the idea of gauge balls (never even heard of them before) to measure the taper. Totally removes the guesswork out of getting the taper correct or even having to test fit to a known taper blank.
I assume that also explains the 3 threaded holes on the arbor, they are purely there for workholding purposes when you were making them?
I am yet to successfully watch your video on your internal grinding of the taper, I assume you have a cylindrical grinder?
Anyway, they look great. I like the idea of fastening the grinding wheel with a threaded flange instead of 3 cap head screws, which is what I currently have. I'll try again to watch the video, according to Joe I need to be patient!
Nope, still cant view it. Says you've moved or deleted it.
SimonGirl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.
-
28th January 2015, 11:45 AM #60GOLD MEMBER
- Join Date
- Jul 2010
- Location
- Melbourne
- Posts
- 7,775
Similar Threads
-
Bringing Back Beauty
By jakoa2008 in forum FURNITURE, JOINERY, CABINETMAKING - formerly BIG STUFFReplies: 3Last Post: 6th June 2011, 03:29 PM -
bringing pine to life
By shane r in forum FINISHINGReplies: 4Last Post: 20th October 2009, 10:37 PM -
Bringing Hall Tables Back To Sydney
By soulspirit in forum WOODWORK - GENERALReplies: 1Last Post: 4th October 2009, 02:16 PM -
surface grinder
By Arron in forum METALWORK FORUMReplies: 9Last Post: 16th September 2006, 11:43 AM