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Am I crazy?
Too big for my 7x16?
I need just to cut/grind/polish the outer surface so it looks nice.
I think it has been a 2” axel , see the key slot. Weight 3.5 kg.
High carbon steel ?
I cut it with an angle grinder: the sparks had a star in the end.
Johannes Lavoll.
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If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
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-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0
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Brian: this is solid steel, 3.5 kg, because of the key slot , it will vibrate.? Slow speed , yes, but what tool? Johannes ? Lavoll. ? ? ? ? ? ? ?
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On 20 Feb 2024, at 20:09, Brian VanDragt <bvandragt@...> wrote:
? If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0 Attachments:
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I don't know what you have for tooling. I would try HSS first. The interrupted cut will probably chip carbide.?
Brian?
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-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:18 PM (GMT-05:00) Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of the key slot , it will vibrate.? Slow speed , yes, but what tool? Johannes ? Lavoll. ? ? ? ? ? ? ?
On 20 Feb 2024, at 20:09, Brian VanDragt <bvandragt@...> wrote:
?If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0 Attachments:
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Maybe I shall cover everything and start with sanding paper? I am only interesting in a nice surface. The key slot shall stay there. Start testing to morrow! Johannes ? Lavoll. ? ? ? ? ? ? ?
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On 20 Feb 2024, at 20:34, Brian VanDragt <bvandragt@...> wrote:
? I don't know what you have for tooling. I would try HSS first. The interrupted cut will probably chip carbide.?
Brian?
-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:18 PM (GMT-05:00) Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of the key slot , it will vibrate.? Slow speed , yes, but what tool? Johannes ? Lavoll. ? ? ? ? ? ? ?
On 20 Feb 2024, at 20:09, Brian VanDragt <bvandragt@...> wrote:
?If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0 Attachments:
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That's an option too.
Brian?
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-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:53 PM (GMT-05:00) Subject: Re: [7x12MiniLathe] Crazy?
Maybe I shall cover everything and start with sanding paper? I am only interesting in a nice surface. The key slot shall stay there. Start testing to morrow! Johannes ? Lavoll. ? ? ? ? ? ? ?
On 20 Feb 2024, at 20:34, Brian VanDragt <bvandragt@...> wrote:
?I don't know what you have for tooling. I would try HSS first. The interrupted cut will probably chip carbide.?
Brian?
-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:18 PM (GMT-05:00) Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of the key slot , it will vibrate.? Slow speed , yes, but what tool? Johannes ? Lavoll. ? ? ? ? ? ? ?
On 20 Feb 2024, at 20:09, Brian VanDragt <bvandragt@...> wrote:
?If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
-------- Original message -------- From: Johannes <johannes@...> Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0 Attachments:
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A shear cut tool will leave you with a very fine surface finish.? ?Bil in Boulder
On Tue, Feb 20, 2024 at 7:53?PM Johannes < johannes@...> wrote: Maybe I shall cover everything and start with sanding paper? I am only interesting in a nice surface. The key slot shall stay there. Start testing to morrow! Johannes ? Lavoll. ? ? ? ? ? ? ?
?I don't know what you have for tooling. I would try HSS first. The interrupted cut will probably chip carbide.?
Brian?
-------- Original message -------- Date: 2/20/24 9:18 PM (GMT-05:00) Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of the key slot , it will vibrate.? Slow speed , yes, but what tool? Johannes ? Lavoll. ? ? ? ? ? ? ?
?If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
-------- Original message -------- Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0Attachments:
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On Tue, Feb 20, 2024 at 7:58?PM Bill Williams < bwmsbldr1@...> wrote: A shear cut tool will leave you with a very fine surface finish.? ?Bil in Boulder
On Tue, Feb 20, 2024 at 7:53?PM Johannes < johannes@...> wrote: Maybe I shall cover everything and start with sanding paper? I am only interesting in a nice surface. The key slot shall stay there. Start testing to morrow! Johannes ? Lavoll. ? ? ? ? ? ? ?
?I don't know what you have for tooling. I would try HSS first. The interrupted cut will probably chip carbide.?
Brian?
-------- Original message -------- Date: 2/20/24 9:18 PM (GMT-05:00) Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of the key slot , it will vibrate.? Slow speed , yes, but what tool? Johannes ? Lavoll. ? ? ? ? ? ? ?
?If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
-------- Original message -------- Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0Attachments:
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??? Scotch pad
animal
On 2/20/24 6:59 PM, Bill Williams
wrote:
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On Tue, Feb 20, 2024 at
7:58?PM Bill Williams < bwmsbldr1@...>
wrote:
A shear cut tool will leave you with a very
fine surface finish.? ?Bil in Boulder
On Tue, Feb 20, 2024 at
7:53?PM Johannes < johannes@...>
wrote:
Maybe I shall cover everything and start
with sanding paper? I am only interesting in a nice
surface.
The key slot shall stay there.
Start testing to morrow!
Johannes ? Lavoll. ? ? ? ? ? ? ?
?I don't know what you have for
tooling. I would try HSS first. The interrupted
cut will probably chip carbide.?
Brian?
-------- Original message --------
Date: 2/20/24 9:18 PM (GMT-05:00)
Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of
the key slot , it will vibrate.?
Slow speed , yes, but what tool?
Johannes ? Lavoll. ? ? ? ? ?
? ?
?If it fits, it's not too
big. I turned some 2 or 2.5" tubing
once.
Brian?
-------- Original message
--------
Date: 2/20/24 9:01 PM (GMT-05:00)
Subject: [7x12MiniLathe] Crazy?
Am I crazy?
Too big for my 7x16?
I need? just to cut/grind/polish the
outer surface so it looks nice.
I think it has been a 2” axel? , see the
key slot. Weight 3.5 kg.
High carbon steel ?
I cut it with an angle grinder: the
sparks had a star in the end.
Johannes?? Lavoll.?????????????
??
Attachments:
image0.jpeg: /g/7x12MiniLathe/attachment/118862/0
Attachments:
|
Use a very sharp tip carbide about 60° and a rake of 3° to 5°.?
Typically I would say C5 but for the project use C6 or C2 they very hard compared to C5.??
Note you may need to sharpen the tool bit a lot.?
Dave?
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Johannes 6:01pm? ?
Am I crazy?
Too big for my 7x16?
I need just to cut/grind/polish the outer surface so it looks nice.
I think it has been a 2” axel , see the key slot. Weight 3.5 kg.
High carbon steel ??
I cut it with an angle grinder: the sparks had a star in the end
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If your suggest sandpaper, that means this doesn't need to be a precision surface, so I would try a very coarse file first Unlike sandpaper that will not shed abrasives all over the lathe.
Mike Taglieri?
On Tue, Feb 20, 2024, 9:53 PM Johannes < johannes@...> wrote: Maybe I shall cover everything and start with sanding paper? I am only interesting in a nice surface. The key slot shall stay there. Start testing to morrow! Johannes ? Lavoll. ? ? ? ? ? ? ?
?I don't know what you have for tooling. I would try HSS first. The interrupted cut will probably chip carbide.?
Brian?
-------- Original message -------- Date: 2/20/24 9:18 PM (GMT-05:00) Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of the key slot , it will vibrate.? Slow speed , yes, but what tool? Johannes ? Lavoll. ? ? ? ? ? ? ?
?If it fits, it's not too big. I turned some 2 or 2.5" tubing once.
Brian?
-------- Original message -------- Date: 2/20/24 9:01 PM (GMT-05:00) Subject: [7x12MiniLathe] Crazy?
Am I crazy? Too big for my 7x16? I need? just to cut/grind/polish the outer surface so it looks nice. I think it has been a 2” axel? , see the key slot. Weight 3.5 kg. High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end. Johannes?? Lavoll.????????????? ?? Attachments: image0.jpeg: /g/7x12MiniLathe/attachment/118862/0Attachments:
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On the same idea as animal said. Take the bar out and use a wire brush in an electric drill.? That will be more aggressive than ScotchBrite.? Once you have all the surface rust off you can get an idea of how much material you need to take off to get a good finish.? If it was an axle, it will probably be hard so HSS won't last long before needing to be resharpened.
If you have a carbide tool, use that with with a reasonable depth of cut.? Could you manage 4 thou?? Modern carbide tips are quite forgiving, but be prepared to go through two or three. As Bill said, if you want a very good finish, you could try a shear tool afterwards.? Then, or instead of the shear tool, use AlOx (abrasive) cloth for the finish.? Protect the lathe ways if using the abrasive cloth.
On Wednesday, 21 February 2024, 03:05:09 UTC, mike allen <animal@...> wrote:
??? Scotch pad
animal
On 2/20/24 6:59 PM, Bill Williams
wrote:
On Tue, Feb 20, 2024 at
7:58?PM Bill Williams < bwmsbldr1@...>
wrote:
A shear cut tool will leave you with a very
fine surface finish.? ?Bil in Boulder
On Tue, Feb 20, 2024 at
7:53?PM Johannes < johannes@...>
wrote:
Maybe I shall cover everything and start
with sanding paper? I am only interesting in a nice
surface.
The key slot shall stay there.
Start testing to morrow!
Johannes ? Lavoll. ? ? ? ? ? ? ?
?I don't know what you have for
tooling. I would try HSS first. The interrupted
cut will probably chip carbide.?
Brian?
-------- Original message --------
Date: 2/20/24 9:18 PM (GMT-05:00)
Subject: Re: [7x12MiniLathe] Crazy?
Brian: this is solid steel, 3.5 kg, because of
the key slot , it will vibrate.?
Slow speed , yes, but what tool?
Johannes ? Lavoll. ? ? ? ? ?
? ?
?If it fits, it's not too
big. I turned some 2 or 2.5" tubing
once.
Brian?
-------- Original message
--------
Date: 2/20/24 9:01 PM (GMT-05:00)
Subject: [7x12MiniLathe] Crazy?
Am I crazy?
Too big for my 7x16?
I need? just to cut/grind/polish the
outer surface so it looks nice.
I think it has been a 2” axel? , see the
key slot. Weight 3.5 kg.
High carbon steel ?
I cut it with an angle grinder: the
sparks had a star in the end.
Johannes?? Lavoll.?????????????
??
Attachments:
image0.jpeg: /g/7x12MiniLathe/attachment/118862/0
Attachments:
|
I would definitely take it off the lathe and get most of the heavy rust removed with coarse sandpaper or coarse wire brush/wheel first.
It's not too big to turn.
--
Lone Tree, Colorado? ?USA
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Check this out - custom steady rest:
this was for as LED lighting project for a subway system...
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On 2/20/2024 9:08 PM, Brian VanDragt wrote: If it fits, it's not too big. I turned some 2 or 2.5" tubing once.Brian
-------- Original message --------From: Johannes <johannes@...> Date: 2/20/24 9:01 PM (GMT-05:00) To: [email protected] Subject: [7x12MiniLathe] Crazy? Am I crazy?Too big for my 7x16?I need? just to cut/grind/polish the outer surface so it looks nice.I think it has been a 2” axel? , see the key slot. Weight 3.5 kg.High carbon steel ? I cut it with an angle grinder: the sparks had a star in the end.Johannes?? Lavoll.????????????? ?? Attachments:image0.jpeg: /g/7x12MiniLathe/attachment/118862/0
Attachments:
20200712_205258_resized.jpg: /g/7x12MiniLathe/attachment/118863/0
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On Feb 20, 2024, at 7:00 PM, Johannes <johannes@...> wrote:
Am I crazy?
Too big for my 7x16?
I need ?just to cut/grind/polish the outer surface so it looks nice.
I think it has been a 2” axel ?, see the key slot. Weight 3.5 kg.
High carbon steel ?
I cut it with an angle grinder: the sparks had a star in the end.
The VERY first thing I'd do is do a file test for hardness. If it’s hardened you’ll want to anneal it first!
I agree with the recommendations for using HSS, because of the interrupted cut. That will also mean a slower speed which may help with the vibration of the unbalanced part.
--?
Bruce Johnson
The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism.
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I found it better to buy the correct steel and it makes life easier.??
Scrap is low cost or even free but it can be a pain too.
Dave?
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The VERY first thing I'd do is do a file test for hardness. If it’s hardened you’ll want to anneal it first!
I agree with the recommendations for using HSS, because of the interrupted cut. That will also mean a slower speed which may help with the vibration of the unbalanced part
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Johannes
davesmith1800