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Re: Insert Holder Alloy
开云体育Just an update in case anyone is interested. I annealed the tool holders at 1550 F. Before annealing, they tested at 45 HRC. After annealing, they tested at 8 HRC. I have read I should use a B scale tester, but I do not have one. A scrap piece of 1018 tested at 15 HRC, so these holders should be easy milling.On 4/25/2024 11:37 AM, Mike Poore via
groups.io wrote:
I did a search for that number. The indicates that is the Swedish equivalent to 4340. |
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Re: Insert Holder Alloy
开云体育
Cheaper to get a carbide endmill than to risk losing 4 holders to heat treat problems.
From: [email protected] <[email protected]> on behalf of Mike Poore <mpoore10@...>
Sent: Thursday, April 25, 2024 12:09 AM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Insert Holder Alloy ?
The problem is I do not know the alloy. I guess I will use the 4140 specs.
On 4/25/2024 12:59 AM, Andrei via groups.io wrote:
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Re: Insert Holder Alloy
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I did a search for that number. The indicates that is the Swedish equivalent to 4340. |
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Re: Insert Holder Alloy
SACRILEDGE !? .. ok, an answer to a question not asked ... but I have made insert holders from bar 2024 aluminum ...? special limited use yes but up to the chip forces I was creating.?? be more than ok for threading, finishing, etc. ... also using up a few odd inserts you might find ... ken, going where no real muchinust would dare to go ... |
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Re: Insert Holder Alloy
开云体育I did a search for that number. The indicates that is the Swedish equivalent to 4340.Sorry for wasting everyone's time. I hate when people ask easily answered questions and I am guilty. I found this that lists the HT specs for most alloys. 1550F is within the annealing range of almost every alloy on the list. 1500F is within the hardening range for almost all alloys. I will have to do more research on tempering, but for an insert holder there should be a wide tolerance. On 4/25/2024 1:17 AM, Andrei via
groups.io wrote:
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Re: Insert Holder Alloy
开云体育It could be something such as 1045. Tool holders don’t need to be 4140. That doesn’t mean for certain that they aren’t, but medium carbon steel is fine. 1045 hardens to RC 45 after tempering at 375-400.Mel On Apr 25, 2024, at 1:09?AM, Mike Poore <mpoore10@...> wrote:
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Re: Insert Holder Alloy
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From: [email protected] <[email protected]> on behalf of Mike Poore <mpoore10@...>
Sent: Thursday, April 25, 2024 1:09:21 AM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Insert Holder Alloy ?
The problem is I do not know the alloy. I guess I will use the 4140 specs.
On 4/25/2024 12:59 AM, Andrei via groups.io wrote:
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Re: Insert Holder Alloy
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From: [email protected] <[email protected]> on behalf of Mike Poore <mpoore10@...>
Sent: Thursday, April 25, 2024 1:09:21 AM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Insert Holder Alloy ?
The problem is I do not know the alloy. I guess I will use the 4140 specs.
On 4/25/2024 12:59 AM, Andrei via groups.io wrote:
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Re: Insert Holder Alloy
开云体育The problem is I do not know the alloy. I guess I will use the 4140 specs.On 4/25/2024 12:59 AM, Andrei via
groups.io wrote:
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Re: Insert Holder Alloy
开云体育That is definitely a great option. I don't have one so my go-to was carbide and coolant.youbare in great shape with the oven
From: [email protected] <[email protected]> on behalf of Mike Poore <mpoore10@...>
Sent: Thursday, April 25, 2024 12:57:57 AM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Insert Holder Alloy ?
I have a heat treating oven right next to my mill, so I would rather use the oven.
On 4/24/2024 11:02 PM, Andrei via groups.io wrote:
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Re: Insert Holder Alloy
开云体育I have a heat treating oven right next to my mill, so I would rather use the oven.On 4/24/2024 11:02 PM, Andrei via
groups.io wrote:
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Re: Insert Holder Alloy
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From: [email protected] <[email protected]> on behalf of Mike Poore <mpoore10@...>
Sent: Wednesday, April 24, 2024 10:38:03 PM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Insert Holder Alloy ?
Not an option for me.
On 4/24/2024 9:43 PM, Andrei via groups.io wrote:
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Re: Insert Holder Alloy
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From: [email protected] <[email protected]> on behalf of Mike Poore <mpoore10@...>
Sent: Wednesday, April 24, 2024 10:38:03 PM To: [email protected] <[email protected]> Subject: Re: [SouthBendLathe] Insert Holder Alloy ?
Not an option for me.
On 4/24/2024 9:43 PM, Andrei via groups.io wrote:
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Re: Insert Holder Alloy
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Re: Insert Holder Alloy
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From: [email protected] <[email protected]> on behalf of Mike Poore <mpoore10@...>
Sent: Wednesday, April 24, 2024 9:41:39 PM To: [email protected] <[email protected]> Subject: [SouthBendLathe] Insert Holder Alloy ?
Anyone happen to know the alloy most likely to be used for carbide insert tool holders? My guess is 4140. I have four that I need to mill down to work in an AXA holder. They test at 45 HRC. Thinking about annealing them before milling and then heat treating
again, so I would like specs to use.
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Insert Holder Alloy
Anyone happen to know the alloy most likely to be used for carbide insert tool holders? My guess is 4140. I have four that I need to mill down to work in an AXA holder. They test at 45 HRC. Thinking about annealing them before milling and then heat treating again, so I would like specs to use.
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Re: quick change gearbox questions
开云体育Correct. I guess we need to know if they made a QCGB for his older model. Otherwise, he will need to make one from another model fit.On 4/24/2024 2:13 PM, mike allen via groups.io wrote:
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Re: quick change gearbox questions
m. allan noah
You don't have a workshop lathe, you have the older, heavier, wide-bed 'Series O' 9" lathe. In the late 30's, this lathe was improved (Series R, S, T etc) and had its swing raised to make the Heavy 10 (aka 10R and 10L). My understanding (though I have not measured it), is that the location of the leadscrew was moved away from the bed during these updates, so the Heavy 10 gearbox will not work. You would need a gearbox from a similar era 9", which unfortunately looks really similar to the Heavy 10. On Tue, Apr 23, 2024 at 7:33?PM Neil Hitze via <nebenco=[email protected]> wrote: Periodic maintenance begets upgrades, as they do.? I've had my 1926 9" workshop(?) model B 4 foot for about eight years, and have been upgrading things as needed. I'm thinking that I might take the quick change gearbox plunge. I'm not restoring the lathe, so originality isn't a concern - only compatibility and function. -- "well, I stand up next to a mountain- and I chop it down with the edge of my hand" |
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Re: quick change gearbox questions
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I can tell you how I handled this situation. I sold my lathe and bought a 9A. The price I got for my old one and the price I paid for the 9A with a GCGB was a lot less than the cost of a GCGB not including the time to fit it. Plus a 9A has auto crossfeed. |
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