Search found 683 matches

by whateg0
Sun Jan 19, 2020 11:53 am
Forum: Lathes
Topic: grinding carbide inserts
Replies: 7
Views: 174

Re: grinding carbide inserts

I hadn't considered using an epoxy and a gap like that. A friend of mine insists that on his cheaper tools that don't have the 7 degree angle on the walls of the pocket, his inserts shift when cutting. Maybe they do but I've never noticed it. This would possible solve that issue.
by whateg0
Sat Jan 18, 2020 10:18 pm
Forum: General Discussion
Topic: Creating a GROOVE inside a very small TUBE (on the lathe)...
Replies: 9
Views: 231

Re: Creating a GROOVE inside a very small TUBE (on the lathe)...

For cutting plastic, whatever you are using will likely be just fine, but your method is not the preferred method. If you try to cut steel, or other harder metals, your tool will not last, as mentioned by Pete.
by whateg0
Sat Jan 18, 2020 6:30 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 7
Views: 174

Re: grinding carbide inserts

I have made my own tool holders before. The first one was for DCMT inserts before I realized that there were cheap holders out there. The others have all been for CCMT inserts. I find it hard to spend $50 for a 6" long piece of steel. I made one holder to use the 100 degree corners of CCMT inserts, ...
by whateg0
Sat Jan 18, 2020 6:27 pm
Forum: General Discussion
Topic: Internal tapered bore
Replies: 5
Views: 118

Re: Internal tapered bore

I actually just dealt with something similar where I needed to turn a tapered groove in the middle of a shaft. In my case, it wasn't critical where the groove ended up, but I still wanted to duplicate the location as closely as I could. So, I used an 1/8" dowel and an L-shaped piece of metal to meas...
by whateg0
Sat Jan 18, 2020 5:51 pm
Forum: General Discussion
Topic: Internal tapered bore
Replies: 5
Views: 118

Re: Internal tapered bore

The maybe more important question is how will you measure its depth?
by whateg0
Sat Jan 18, 2020 4:41 pm
Forum: General Discussion
Topic: Internal tapered bore
Replies: 5
Views: 118

Re: Internal tapered bore

Yes, lathe plus boring bar. To get best results you need to have an original that you can measure the taper in. Adjusting the compound to match. Or if using a taper attachment match it with that. I don't know how steep the tapir is so I don't know if a taper attachment is appropriate or not
by whateg0
Sat Jan 18, 2020 10:30 am
Forum: Lathes
Topic: grinding carbide inserts
Replies: 7
Views: 174

Re: grinding carbide inserts

That loss of repeatability is the reason I ordered another holder. One can hold stock inserts. The other can be for reground inserts and will have to be adjusted as needed. I have no idea what grit the diamond wheel is that I have. It was on the grinder when I bought it, but it does an ok job for th...
by whateg0
Fri Jan 17, 2020 7:04 pm
Forum: General Discussion
Topic: Creating a GROOVE inside a very small TUBE (on the lathe)...
Replies: 9
Views: 231

Re: Creating a GROOVE inside a very small TUBE (on the lathe)...

You don't have a location in your profile. I know a lot of folks here are willing to help somebody learn. I am going to guess from the tool you were using that you don't have a lot of training on running the lathe?

Dave
by whateg0
Fri Jan 17, 2020 6:55 pm
Forum: Lathes
Topic: grinding carbide inserts
Replies: 7
Views: 174

grinding carbide inserts

Maybe this has been discussed before, but I recall watching a video from Stefan Gotteswinter where he described regrinding carbide inserts to match one he had come across at some point. I was recently facing a square part in the lathe and as one corner came around the insert chipped. But, after it c...
by whateg0
Fri Jan 17, 2020 5:35 pm
Forum: General Discussion
Topic: Creating a GROOVE inside a very small TUBE (on the lathe)...
Replies: 9
Views: 231

Re: Creating a GROOVE inside a very small TUBE (on the lathe)...

Here's an example of the style of tool I would use.
boring.jpg
by whateg0
Fri Jan 17, 2020 5:32 pm
Forum: General Discussion
Topic: Creating a GROOVE inside a very small TUBE (on the lathe)...
Replies: 9
Views: 231

Re: Creating a GROOVE inside a very small TUBE (on the lathe)...

If I was making this part, I would grind a tool to put on the toolpost. That way, I can control the depth of the groove. That looks like just a wire, and I can't see what the cutting edge looks like in the photo. I think you would have a hard time getting consistent results that way, even if you do ...
by whateg0
Wed Jan 15, 2020 11:55 am
Forum: General Discussion
Topic: Keeping multiple drilled holes aligned
Replies: 4
Views: 193

Re: Keeping multiple drilled holes aligned

...but how does one keep the drill from wandering in the Aluminum casting when drilling the following holes? Thanks for any suggestions! Especially in castings, where the surface may be imperfect and there might be hard spots, I like to use a spotting drill. But here again, a center drill can be us...