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Thread: Scissor knurl
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3rd June 2012, 02:16 PM #31Dave J Guest
Sorry to miss lead any one, but Ewan is right.
I did say at the bottom of the post
"Now I just have to finish shaping the adjusters, but thats the knurling out of the way."
I machined a threaded arbour in the lathe and used a pair of multi grips with the lathe running to thread on and off at 60rpm.
If you look at the 7th picture you can just see the line between them.
I roughed these out, now I have done the knurling, then onto the shaping. It just makes it so much easier to do them on the arbour doing each operation so I can use the same tool on each.
Dave
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3rd June 2012, 02:45 PM #32Dave J Guest
Here is a picture of the arbour, I meant to take one last night, but forgot and now it's caused confusion, sorry.
Dave
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3rd June 2012, 02:51 PM #33Dave J Guest
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
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3rd June 2012, 03:01 PM #34Dave J Guest
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.
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3rd June 2012, 03:34 PM #35
Knurl types
Arent we a bit off on the name of our knurl type.
pics below
- Scissor Knurl
- Straddle knurl
- 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
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3rd June 2012, 03:43 PM #36
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.
1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
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3rd June 2012, 04:03 PM #37Dave J Guest
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3rd June 2012, 04:06 PM #38Dave J Guest
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3rd June 2012, 07:50 PM #39GOLD MEMBER
- Join Date
- Mar 2011
- Location
- Dural NSW
- Age
- 82
- Posts
- 1,120
Spiral & Gun Taps
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
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3rd June 2012, 08:14 PM #40
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.1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
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3rd June 2012, 08:41 PM #41Dave J Guest
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
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3rd June 2012, 09:13 PM #42SENIOR MEMBER
- Join Date
- Sep 2011
- Location
- Ballarat
- Age
- 65
- Posts
- 2,659
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3rd June 2012, 09:18 PM #43Dave J Guest
So true Phil.
Dave
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6th June 2012, 04:37 PM #44Dave J Guest
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
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7th June 2012, 01:52 AM #45
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!1915 17"x50" LeBlond heavy duty Lathe, 24" Queen city shaper, 1970's G Vernier FV.3.TO Universal Mill, 1958 Blohm HFS 6 surface grinder, 1942 Rivett 715 Lathe, 14"x40" Antrac Lathe, Startrite H225 Bandsaw, 1949 Hercus Camelback Drill press, 1947 Holbrook C10 Lathe.
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