Thread: Scissor knurl

Here is a picture of the arbour, I meant to take one last night, but forgot and now it's caused confusion, sorry.



Dave

Originally Posted by Abratool

Nice work Dave.
The scissor knurl is a winner. Since I got mine I never pick up the old push knurl, anymore.
This job of yours would be like playing music when done on a Turret or Capstan Lathe.
Just as a matter of interest was the tap you used a straight or spiral flute.
I ask this as I have had discussion & notes with BT Bob. I have a few spiral flute BSW taps & they cut beautifully on the lathe.
regards
Bruce

Hi Bruce,
I did look at buying some of those taps myself, but thought by the time they turn up I could have them done. It always seems to be that way and I should just buy some.

With these I roughed them out and then did them with a hand tap in the bench vise with soft jaws, it really didn't take that long.
I also did the 200 odd holes in the tool post holders with a hand tap and I had it down to about 3 minutes for 5 holes. I did those on the end of the mill table with the coolant running to wash away the chips. It made easy work of them with the coolant washing the chips away and also lubing the tap.

Dave

Originally Posted by Anorak Bob

Hey Dave,

Well done.

This would have been a perfect project for that old Ward. I imagine you had to change tools 61 times. Even a rear tool post would have been useful, reducing the number of changes.

Bob.

Thanks Bob and everyone else for the comments.
It would have been a good job for the Ward, but I would need to tool it up as it didn't come with much. I looked at it the other day under the tarp outside to make sure it was still there and was not rusting away.

You have probably already read about the arbour above, sorry to miss lead you. I did think I hope no one thinks I made them in one go after I posted them.If I did them that way I would still be down there doing them, this way I can do a bit when I want.

Dave

PS
Michael
It felt like that when I was setting it up, LOL
I really do need to get around to making a new cabinet for the lath to run coolant when I need it.

Arent we a bit off on the name of our knurl type.

pics below

1. Scissor Knurl
2. Straddle knurl
3. Push knurl

I have some scissor knurls but they are chunky heavy things.
I have purchased dome fine parallel knurl wheels to make a pair of straddle knurls.

Grahame

Originally Posted by Dave J

Hi Bruce,
I did look at buying some of those taps myself, but thought by the time they turn up I could have them done. It always seems to be that way and I should just buy some.

With these I roughed them out and then did them with a hand tap in the bench vise with soft jaws, it really didn't take that long.
I also did the 200 odd holes in the tool post holders with a hand tap and I had it down to about 3 minutes for 5 holes. I did those on the end of the mill table with the coolant running to wash away the chips. It made easy work of them with the coolant washing the chips away and also lubing the tap.

Dave

Not sure what sort of spiral tap you are talking about, a full spiral or just an angled tip. I have some dormer "gun nose" taps, i'll have to have a look at the numbers when i'm next out in the shed, but they have a Spiral point with the rest of the tap straight. I have only ever used them as hand taps but they can be used a machine taps too. Like most HSS taps though they are not cheap, I think around $25 for an m6, but in the 7 years of owning them i have never broken one.

Originally Posted by Ueee

Not sure what sort of spiral tap you are talking about, a full spiral or just an angled tip. I have some dormer "gun nose" taps, i'll have to have a look at the numbers when i'm next out in the shed, but they have a Spiral point with the rest of the tap straight. I have only ever used them as hand taps but they can be used a machine taps too. Like most HSS taps though they are not cheap, I think around $25 for an m6, but in the 7 years of owning them i have never broken one.

The one I was looking at look like a drill bit with thread on it.

Dave

Originally Posted by Grahame Collins

Arent we a bit off on the name of our knurl type.

pics below

1. Scissor Knurl
2. Straddle knurl
3. Push knurl

I have some scissor knurls but they are chunky heavy things.
I have purchased dome fine parallel knurl wheels to make a pair of straddle knurls.

Grahame

Thinking about it, your right there Graham, to late to edit my heading to straddle knurler. I think mine is a reverse straddle knurler.

Dave

Originally Posted by Ueee

Not sure what sort of spiral tap you are talking about, a full spiral or just an angled tip. I have some dormer "gun nose" taps, i'll have to have a look at the numbers when i'm next out in the shed, but they have a Spiral point with the rest of the tap straight. I have only ever used them as hand taps but they can be used a machine taps too. Like most HSS taps though they are not cheap, I think around $25 for an m6, but in the 7 years of owning them i have never broken one.

Ewan
The taps I use in the lathe are HSS spiral fluted taps, not gun taps with a spiral point.
The gun taps I think can be used for hand tapping as can the straight flute taps, but the full spiral flute taps can only be used on machine, from what I can gather.
The spiral flute taps cut metal like butter & have a long life.
regards
Bruce

Originally Posted by Abratool

Ewan
The taps I use in the lathe are HSS spiral fluted taps, not gun taps with a spiral point.
The gun taps I think can be used for hand tapping as can the straight flute taps, but the full spiral flute taps can only be used on machine, from what I can gather.
The spiral flute taps cut metal like butter & have a long life.
regards
Bruce

Thanks Bruce,
The gun nose taps make standard HSS taps look like rubbish, and for me the price is justified. As i said i have never tried them on a machine, but i'm sure i will one day. They may not cut as well as spiral taps but as you say you can't use a spiral by hand. Thanks for the clarification.

Just goes to show what type of forum members we have here.
I was just messaged from one of our regular members here with an offer to send a spiral tap over for me to try.
Don't see things like that elsewhere.

Thanks for the offer, it always amazes me of the generosity of members here.

Dave

Originally Posted by Dave J

Just goes to show what type of forum members we have here.
I was just messaged from one of our regular members here with an offer to send a spiral tap over for me to try.
Don't see things like that elsewhere.

Thanks for the offer, it always amazes me of the generosity of members here.

Dave

And it was a private message which speaks volumes to me of the calibre of the members

So true Phil.

Dave

I was looking for a picture of Stuarts lathe for Simon and came across Gavin Newman's knurler on the first page of show us your lathe thread, so I thought it deserved to be included in a currant thread as it's a work of art.
I like the T handle idea as it would be balanced when you spin it undone.
Nice work Gavin



Dave

Nice one Gavin

It looks very substantial and rigid. Now what on a cart needs knurling.......my old boss used to race a clubman, he had an arrow chassis. Damn scarey but loads of fun!