Search found 996 matches

by dly31
Fri Feb 02, 2018 8:43 pm
Forum: General Discussion
Topic: Need to remove a broken tap in cast iron
Replies: 13
Views: 1677

Re: Need to remove a broken tap in cast iron

A tap extractor can work if the tap is not bound too tight in the hole. If it is, a few heavy hammer blows on a suitable punch will sometimes free it up enough for the extractor to do the job.
by dly31
Wed Jan 31, 2018 11:30 pm
Forum: General Discussion
Topic: Bits Spin in Hand Drills
Replies: 52
Views: 3910

Re: Bits Spin in Hand Drills

I don't remember where I got them but I have some drill sets that have three small flats on the shanks.
by dly31
Wed Jan 31, 2018 11:21 pm
Forum: General Discussion
Topic: Need to remove a broken tap in cast iron
Replies: 13
Views: 1677

Re: Need to remove a broken tap in cast iron

If you have enough time and patience, broken taps and the like can be removed by grinding the center out with a piece of brass tubing and abrasive such as automotive valve grinding compound.
by dly31
Tue Dec 26, 2017 10:43 pm
Forum: Milling Machines
Topic: bridgeport handwheel clutch collar - ball stuck
Replies: 48
Views: 10272

Re: bridgeport handwheel clutch collar - ball stuck

I have had good results removing such stuck balls and broken dogbones where there seemed to be burrs by sticking a small tube to the ball, putting valve grinding compound into the hole, and gently pulling on the tube while rotating it to grind the burrs away.
by dly31
Wed Jan 18, 2017 9:36 pm
Forum: Lathes
Topic: Newbie Quick Change Question For 6" Lathe
Replies: 11
Views: 1949

Re: Newbie Quick Change Question For 6" Lathe

I seem to recall seeing, somewhere on the internet, a copy of an old article on building a QC gearbox for an Atlas 618. It may have been an old Popular Science article. I agree that it would be a major undertaking. I think CNC conversion would be easier.
by dly31
Wed Apr 20, 2016 9:11 pm
Forum: General Discussion
Topic: OT metric threads
Replies: 16
Views: 2299

Re: OT metric threads

While that works on principle, pencil mark on oily ways? I was wrong, I tried a pencil mark on a oily way and it was perfectly legible. If you have a thread dial it can also be used to catch the right point on the leadscrew as long as the carriage is within one revolution of the dial of the right s...
by dly31
Mon Apr 11, 2016 9:22 pm
Forum: General Discussion
Topic: 3 phase convertor failure
Replies: 70
Views: 5856

Re: 3 phase convertor failure

It seems to me that for the motor to brake rather than accelerate when power is applied, some coils have to be connected in reverse to the others. It is not just a matter of connecting the coils in the proper configuration, you have to connect the proper ends of the coils. This should be the case if...
by dly31
Mon Apr 11, 2016 9:07 pm
Forum: General Discussion
Topic: OT metric threads
Replies: 16
Views: 2299

Re: OT metric threads

You could just as well make a pencil mark on the ways before disengaging the half nuts. Your re-positioning only has to be accurate enough to hit the right thread on the leadscrew (+/- 0.125" on an 8 TPI screw).
by dly31
Wed Feb 17, 2016 9:54 pm
Forum: The Junk Drawer
Topic: Need tp locate small Pentagon female bits or sockets
Replies: 14
Views: 3022

Re: Need tp locate small Pentagon female bits or sockets

I suggested that because I have heated worn out Phillips screwdrivers and hammered them into new screw slots and it restored the tip shape pretty well.
by dly31
Wed Feb 17, 2016 9:27 pm
Forum: Lathes
Topic: Don't know how to thread on this lathe
Replies: 61
Views: 9956

Re: Don't know how to thread on this lathe

I am happy that you found the way to change the leadscrew drive on the right side. I thought for a long time that there had to be something in that area that was missing. I believe all that remains is to get the gears (and the metric shaft) on the left side correct. I think I had that figured out at...
by dly31
Tue Feb 16, 2016 10:46 pm
Forum: Lathes
Topic: Don't know how to thread on this lathe
Replies: 61
Views: 9956

Re: Don't know how to thread on this lathe

After watching the video again, I have a new idea. I believe the lower shaft cap on the right side has a piece behind it which will connect the upper shaft to that unknown function gear. It may be a rotating part of the cap or it may be a separate part. If it is a separate part, remove it and instal...
by dly31
Tue Feb 16, 2016 9:53 pm
Forum: Lathes
Topic: Don't know how to thread on this lathe
Replies: 61
Views: 9956

Re: Don't know how to thread on this lathe

Your movies have helped my understanding somewhat. Keep in mind that the drive to the leadscrew has to go through the stack of different size gears (which I call the cone gears). The missing piece of the puzzle for metric threading definitely includes the gear on the right side which is connected to...