Wow. Lots of questions. One fact is really obvious. My machine operator pair should take cuts 10x deeper than I am.
The lathe head and all associated gearing is good. It was recently rebuilt and all pins, etc. were replaced correctly. Of that I am pretty certain. The drive unit moves freely, was also rebuilt, and operates correctly.?
Speeds are from the ebay chart I bought. The HSS tools I grind are based upon lots of videos I watch. I bought a jig to help get the angles correct. My carbide are inserts, many are still the original chinesium, but are being replaced
by higher quality as they die. I use a Boxer quick change toolpost.
Now, here is where I feel the problem lies since I do not have the power to make deep cuts:?
I use a link belt on the motor. It slips especially as oil gets on it. The bearing in the drive unit slings oil. The drive belt to the lathe head is a serpentine auto belt. It seems to transfer power efficiently. The drive unit is mounted
on channel so it's adjustable.??
I am wondering about switching to an auto v-belt for the motor. Next, could the channel be flexing? It is the kind used to support conduit.
Thanks,
Steven
Get
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What sort of carbide are you using? I've never had good luck with the 0 degree rake brazed carbide. I hear that it wants to run really fast.
On 6/25/23 14:24, Brandon Corey wrote:
0.002” is way too low. ?I run 0.015”-0.020” at a minimum for the hardest materials. ?Material? ?Speeds? ?What size is your motor?
Brandon
I have a simple question. How deep of cuts do you normally make?
I have a 1949 vintage SB9C, with 6 speeds. I replaced the 1/4 hp motor with a 1/2 HP one. I use carbide a lot, but HSS still gets used some. Many of the videos say I should take at least a 0.005" cut for the best finish. I usually cannot take more than 0.002"
with dragging down, or stopping, the spindle.
What's reasonable for me?
Thanks, Steven
|
If the spindle is slowing or stopping either: 1. the motor is not powerful enough (1/4 should do better, 1/2 is plenty)? 2. the belt is slipping on a pulley or? 3. a pulley is slipping on a shaft( bull gear pin not engaged or a broken\missing key or pin on some other gear.
When the spindle stops is the motor still turning?? With the motor unplugged run the toolpost into contact with the chuck and try to turn the motor pulley by hand and see where the motion stops.
On a 9 inch lathe with 1/2 hp HSS cutters should easily cut .050.? When using carbide be sure use positive rake cutters and smaller depths.
|
What sort of carbide are you using? I've never had good luck with
the 0 degree rake brazed carbide. I hear that it wants to run
really fast.
On 6/25/23 14:24, Brandon Corey wrote:
toggle quoted message
Show quoted text
0.002” is way too low. ?I run 0.015”-0.020” at a minimum for the
hardest materials. ?Material? ?Speeds? ?What size is your motor?
Brandon
I have a simple question. How deep of cuts
do you normally make?
I have a 1949 vintage SB9C, with 6 speeds. I replaced
the 1/4 hp motor with a 1/2 HP one. I use carbide a
lot, but HSS still gets used some. Many of the videos
say I should take at least a 0.005" cut for the best
finish. I usually cannot take more than 0.002" with
dragging down, or stopping, the spindle.
What's reasonable for me?
Thanks, Steven
|
0.002” is way too low. ?I run 0.015”-0.020” at a minimum for the hardest materials. ?Material? ?Speeds? ?What size is your motor?
toggle quoted message
Show quoted text
I have a simple question. How deep of cuts do you normally make?
I have a 1949 vintage SB9C, with 6 speeds. I replaced the 1/4 hp motor with a 1/2 HP one. I use carbide a lot, but HSS still gets used some. Many of the videos say I should take at least a 0.005" cut for the best finish. I usually cannot take more than 0.002" with dragging down, or stopping, the spindle.
What's reasonable for me?
Thanks, Steven
|
I regularly take .050 on my 9A
Two variables to look at - feeds and speeds.
Try feeding slower.
Make sure your RPM is right for the diameter - your SFPM (surface
feet per minute). This can make a HUGE difference.
The Is-It-Plugged in question - is the bull gear pin that pins
the spindle to the headstock pulley in place?
What else slows down? The motor, the
countershaft?
On 6/25/23 00:03, David R8 wrote:
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On my 10K I could take a .060 DOC no problem.?
?I have a simple question. How deep of cuts do
you normally make?
I have a 1949 vintage SB9C, with 6 speeds. I replaced the 1/4
hp motor with a 1/2 HP one. I use carbide a lot, but HSS still
gets used some. Many of the videos say I should take at least
a 0.005" cut for the best finish. I usually cannot take more
than 0.002" with dragging down, or stopping, the spindle.
What's reasonable for me?
Thanks, Steven
|
Re: SB 16" for sale in North of England
It's in better shape than my Heavy 10L. Longer bed, too. Says "May not post to the United States" so I'm out of luck...
I'm also having enough trouble stuffing the stuff I already have in my so-called shop. Hope someone who'll love it can get it.
Bill in OKC
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Saturday, June 24, 2023 at 10:10:37 PM CDT, Steven Schlegel <sc.schlegel@...> wrote:
What a shame. All that rust.
Get
Anybody interested? On ebay. I have no connection with the vendor or ebay.
https://www.ebay.co.uk/itm/295762637622?_trkparms=amclksrc%3DITM%26aid%3D1110003%26algo%3DSPLICE.IMAGESIM%26ao%3D1%26asc%3D20200818141841%26meid%3Df92eff385a5a433583df4a0127ed8ca1%26pid%3D101112%26rk%3D1%26rkt%3D12%26sd%3D125987539241%26itm%3D295762637622%26pmt%3D1%26noa%3D0%26pg%3D2349624%26algv%3DImageSimWithSimv9Limev2CacheOnly&_trksid=p2349624.c101112.m1982&amdata=cksum%3A295762637622f92eff385a5a433583df4a0127ed8ca1%7Cenc%3AAQAIAAABAFyvRHL9pwWmSo5mFpt6yvq3U5yAdIfOufmTAr6ViClr8WoFkrymmkGtY%252Bhq1v6%252BJbRMfjniUX4KR%252FL%252BeFTbVWEcd5PdntzZUik3ARQao51JG4jTo0vw3jUISavlPAEvRNJvdCA%252BznFHm3dCGjdnht4%252FHevS%252FiJpXuxBbReltW%252BfQf6693crK6znWvCCbrOow%252BPgA9ixjqk8lCV00Mn9Xss84AaQK%252FzlTVC8qcJHMvLwMIPg%252FBgfOqYFjJ10J%252FKR9lgnAWMDXfhNUe5cAVU93N3MUWNcfCfx%252F8%252BUJXPzaFFzmZEmeOjR2fSKL%252F4gzBrziXAMe2y5K7nWDUjfbtjKEvU%253D%7Campid%3APL_CLK%7Cclp%3A2349624
Eddie
|
On my 10K I could take a .060 DOC no problem.?
toggle quoted message
Show quoted text
On Jun 24, 2023, at 8:20 PM, Steven Schlegel <sc.schlegel@...> wrote:
?I have a simple question. How deep of cuts do you normally make?
I have a 1949 vintage SB9C, with 6 speeds. I replaced the 1/4 hp motor with a 1/2 HP one. I use carbide a lot, but HSS still gets used some. Many of the videos say I should take at least a 0.005" cut for the best finish. I usually cannot take more than 0.002" with dragging down, or stopping, the spindle.
What's reasonable for me?
Thanks, Steven
|
I have a simple question. How deep of cuts do you normally make?
I have a 1949 vintage SB9C, with 6 speeds. I replaced the 1/4 hp motor with a 1/2 HP one. I use carbide a lot, but HSS still gets used some. Many of the videos say I should take at least a 0.005" cut for the best finish. I usually cannot take more than 0.002" with dragging down, or stopping, the spindle.
What's reasonable for me?
Thanks, Steven
|
Re: SB 16" for sale in North of England
What a shame. All that rust.
Get
toggle quoted message
Show quoted text
Anybody interested? On ebay. I have no connection with the vendor or ebay.
https://www.ebay.co.uk/itm/295762637622?_trkparms=amclksrc%3DITM%26aid%3D1110003%26algo%3DSPLICE.IMAGESIM%26ao%3D1%26asc%3D20200818141841%26meid%3Df92eff385a5a433583df4a0127ed8ca1%26pid%3D101112%26rk%3D1%26rkt%3D12%26sd%3D125987539241%26itm%3D295762637622%26pmt%3D1%26noa%3D0%26pg%3D2349624%26algv%3DImageSimWithSimv9Limev2CacheOnly&_trksid=p2349624.c101112.m1982&amdata=cksum%3A295762637622f92eff385a5a433583df4a0127ed8ca1%7Cenc%3AAQAIAAABAFyvRHL9pwWmSo5mFpt6yvq3U5yAdIfOufmTAr6ViClr8WoFkrymmkGtY%252Bhq1v6%252BJbRMfjniUX4KR%252FL%252BeFTbVWEcd5PdntzZUik3ARQao51JG4jTo0vw3jUISavlPAEvRNJvdCA%252BznFHm3dCGjdnht4%252FHevS%252FiJpXuxBbReltW%252BfQf6693crK6znWvCCbrOow%252BPgA9ixjqk8lCV00Mn9Xss84AaQK%252FzlTVC8qcJHMvLwMIPg%252FBgfOqYFjJ10J%252FKR9lgnAWMDXfhNUe5cAVU93N3MUWNcfCfx%252F8%252BUJXPzaFFzmZEmeOjR2fSKL%252F4gzBrziXAMe2y5K7nWDUjfbtjKEvU%253D%7Campid%3APL_CLK%7Cclp%3A2349624
Eddie
|
SB 16" for sale in North of England
Anybody interested? On ebay. I have no connection with the vendor or ebay.
https://www.ebay.co.uk/itm/295762637622?_trkparms=amclksrc%3DITM%26aid%3D1110003%26algo%3DSPLICE.IMAGESIM%26ao%3D1%26asc%3D20200818141841%26meid%3Df92eff385a5a433583df4a0127ed8ca1%26pid%3D101112%26rk%3D1%26rkt%3D12%26sd%3D125987539241%26itm%3D295762637622%26pmt%3D1%26noa%3D0%26pg%3D2349624%26algv%3DImageSimWithSimv9Limev2CacheOnly&_trksid=p2349624.c101112.m1982&amdata=cksum%3A295762637622f92eff385a5a433583df4a0127ed8ca1%7Cenc%3AAQAIAAABAFyvRHL9pwWmSo5mFpt6yvq3U5yAdIfOufmTAr6ViClr8WoFkrymmkGtY%252Bhq1v6%252BJbRMfjniUX4KR%252FL%252BeFTbVWEcd5PdntzZUik3ARQao51JG4jTo0vw3jUISavlPAEvRNJvdCA%252BznFHm3dCGjdnht4%252FHevS%252FiJpXuxBbReltW%252BfQf6693crK6znWvCCbrOow%252BPgA9ixjqk8lCV00Mn9Xss84AaQK%252FzlTVC8qcJHMvLwMIPg%252FBgfOqYFjJ10J%252FKR9lgnAWMDXfhNUe5cAVU93N3MUWNcfCfx%252F8%252BUJXPzaFFzmZEmeOjR2fSKL%252F4gzBrziXAMe2y5K7nWDUjfbtjKEvU%253D%7Campid%3APL_CLK%7Cclp%3A2349624
Eddie
|
Re: 14.5” toolroom 8’ for sale in Neptune, NJ
Come on, we all know it's a 'parts lathe' to keep yours running in case of accident since it's antique and parts aren't made any longer...? I'm sure several of us would write you letters of reference for her...
On Fri, Jun 23, 2023 at 6:19?AM Jyorge Maccaline < jm1gteam@...> wrote: yes
On Fri, Jun 23, 2023 at 5:57?AM George Meinschein via <gmeinschein= [email protected]> wrote: Hey all,
$1500.? I can see that it has a double tumbler, taper attachment, thread dial, a steady rest and a bunch of collets.? I already have a 14.5” toolroom and I’m still tempted to drag it home, but that would risk me getting killed or worse.
-George M.
|
Re: 14.5” toolroom 8’ for sale in Neptune, NJ
I think the lathe is big enough to slide a mattress under it, until the wife calms down. Go for it!
toggle quoted message
Show quoted text
yes
On Fri, Jun 23, 2023 at 5:57?AM George Meinschein via
<gmeinschein= [email protected]> wrote:
Hey all,
$1500.? I can see that it has a double tumbler, taper attachment, thread dial, a steady rest and a bunch of collets.? I already have a 14.5” toolroom and I’m still tempted to drag it home, but that would risk me getting killed or worse.
-George M.
|
Re: 14.5” toolroom 8’ for sale in Neptune, NJ
yes On Fri, Jun 23, 2023 at 5:57?AM George Meinschein via <gmeinschein= [email protected]> wrote:
Hey all,
$1500.? I can see that it has a double tumbler, taper attachment, thread dial, a steady rest and a bunch of collets.? I already have a 14.5” toolroom and I’m still tempted to drag it home, but that would risk me getting killed or worse.
-George M.
|
14.5” toolroom 8’ for sale in Neptune, NJ
Hey all,
$1500. ?I can see that it has a double tumbler, taper attachment, thread dial, a steady rest and a bunch of collets. ?I already have a 14.5” toolroom and I’m still tempted to drag it home, but that would risk me getting killed or worse.
-George M.
|
First, let me be clear that I don’t get much oil on the flat belt.? I use a serpentine automotive belt, and the oil doesn’t seem to affect it adversely.? If it does, I simply tighten the belt.? I am talking about the v-belt on the motor.?
There are two sources where the oil comes from: Sometimes I sling oil while lubricating the tool during a cut, especially when the RPMs are high.? This is a minor source on my motor belt.? The major source is oil from the bearings in the horizonal drive unit.?
My bearings are cast iron, circa 1949.? The bearings still seem tight and have felt wipers in them. However, I sometimes get a squeal under heavy load, so I always fill the gits oilers before use.? I also use iso-68 weight oil to alleviate the squealing.
?
Steven
?
Sent from for Windows
?
toggle quoted message
Show quoted text
From: Rick
Sent: Tuesday, June 13, 2023 4:56 PM
To: [email protected]
Subject: Re: [SouthBendLathe] V Belt
?
Any belt will slip if you get oil on it. I have several machines, getting oil on the belt has never happened to me. How are you getting oil on it?
On Tue, Jun 13, 2023 at 05:38 PM, Steven Schlegel wrote:
I have a link belt on my SB9c and it slips a lot. In the machining environment, it's impossible to keep oil off the pullies. It's smooth, but if it doesn't transfer the power...
A Gates V belt should be as close to perfect as makes no difference! An earlier post suggested warming it to ease the storage deflections out of it. I'd do it in a bucket of very hot water, not coiled, and then get it onto the machine as
fast as possible while it is till warm and run it at medium speed, good tension, off load for an hour. If it is still causing bother after that, take it back to the shop. You could try sliding it manually along the V of a pulley and see if there are any obvious
high spots, or carefully and lightly caress it with a stick of chalk while it is running to find a high spot. Just hope you don't find a high or low spot on one of your pulleys when you do this.
?
Is it a plain or notched belt, incidentally, please? I'd assume a modern cut edge type, not a wrapped one. Notched ones go round small radii easier as they are more flexible.
?
Eddie (UK)
------ Original Message ------
From: "Rick" <vwrick@...>
To: [email protected]
Sent: Tuesday, 13 Jun, 23 At 21:01
Subject: Re: [SouthBendLathe] V Belt
Get an Accurate-Link belt. They are available at Harbor Freight. I run these on all my machine tools.
|
Any belt will slip if you get oil on it. I have several machines, getting oil on the belt has never happened to me. How are you getting oil on it?
On Tue, Jun 13, 2023 at 05:38 PM, Steven Schlegel wrote:
I have a link belt on my SB9c and it slips a lot. In the machining environment, it's impossible to keep oil off the pullies. It's smooth, but if it doesn't transfer the power...
?
Steven S
?
Get
A Gates V belt should be as close to perfect as makes no difference! An earlier post suggested warming it to ease the storage deflections out of it. I'd do it in a bucket of very hot water, not coiled, and then get it onto the machine as fast as possible while it is till warm and run it at medium speed, good tension, off load for an hour. If it is still causing bother after that, take it back to the shop. You could try sliding it manually along the V of a pulley and see if there are any obvious high spots, or carefully and lightly caress it with a stick of chalk while it is running to find a high spot. Just hope you don't find a high or low spot on one of your pulleys when you do this.
?
Is it a plain or notched belt, incidentally, please? I'd assume a modern cut edge type, not a wrapped one. Notched ones go round small radii easier as they are more flexible.
?
Eddie (UK)
------ Original Message ------
From: "Rick" <vwrick@...>
To: [email protected]
Sent: Tuesday, 13 Jun, 23 At 21:01
Subject: Re: [SouthBendLathe] V Belt
Get an Accurate-Link belt. They are available at Harbor Freight. I run these on all my machine tools.
|
How do you manage to splash your pullies??
toggle quoted message
Show quoted text
I have a link belt on my SB9c and it slips a lot. In the machining environment, it's impossible to keep oil off the pullies. It's smooth, but if it doesn't transfer the power...
Steven S
Get
A Gates V belt should be as close to perfect as makes no difference! An earlier post suggested warming it to ease the storage deflections
out of it. I'd do it in a bucket of very hot water, not coiled, and then get it onto the machine as fast as possible while it is till warm and run it at medium speed, good tension, off load for an hour. If it is still causing bother after that, take it back
to the shop. You could try sliding it manually along the V of a pulley and see if there are any obvious high spots, or carefully and lightly caress it with a stick of chalk while it is running to find a high spot. Just hope you don't find a high or low spot
on one of your pulleys when you do this.
Is it a plain or notched belt, incidentally, please? I'd assume a modern cut edge type, not a wrapped one. Notched ones go round small radii easier as they are more flexible.
Eddie (UK)
------ Original Message ------
From: "Rick" <vwrick@...>
To: [email protected]
Sent: Tuesday, 13 Jun, 23 At 21:01
Subject: Re: [SouthBendLathe] V Belt
Get an Accurate-Link belt. They are available at Harbor Freight. I run these on all my machine tools.
|
Re: Looking for a steady rest
Yes “Tools for Cheep” Jeff Beck.? I was aware he retired but thought I should mention it as a possibility.?
toggle quoted message
Show quoted text
On Jun 13, 2023, at 5:50 PM, ww_big_al <arknack@...> wrote:
? I believe you are referring to “Tools For Cheap” I purchased one from him for my 9a. Unfortunately, he retired and is no longer there. Al ? Thanks Jim. Don't suppose you have any other info?on who he is or how I could find him? Greg ? On Tue, Jun 13, 2023 at 1:28?PM Jim_B <jim@...> wrote: There used to be a Vendor, who had Steady’s to fit most of the SB lathes. They were custom made in China.? His first name was Jeff.? I can’t remember the company.? I had one for my Heavy 10.? Perhaps you could find one of his.? ? ? Thanks John. Advise when you can. Greg ? I may have one.? I will look around when I can.?? ? Email: jbusch@... ? John ? Minnesota ? On Tue, 13 Jun, 2023 at 9:44 AM, Greg <condor6213@...> wrote: Hey Folks. I am looking for a steady rest for a 10L Heavy. Anybody got a spare you're looking to sell? I know that the 9 & 10K rests are basically the same (or exactly, IDK). But can anyone out there tell me if a steady rest from another SB lathe is the same as (or will fit on) the 10L heavy? Maybe I'm limiting my search too much and need to start looking for steady rests that will fit the 10L heavy AS WELL AS the XXXXX? Thanks, Greg
--
Jim B
--
Jim B
|
Re: Looking for a steady rest
I believe you are referring to “Tools For Cheap” I purchased one from him for my 9a. Unfortunately, he retired and is no longer there. Al
toggle quoted message
Show quoted text
From: [email protected] < [email protected]> On Behalf Of Greg Sent: Tuesday, June 13, 2023 5:27 PM To: [email protected]Subject: Re: [SouthBendLathe] Looking for a steady rest ? Thanks Jim. Don't suppose you have any other info?on who he is or how I could find him? Greg ? On Tue, Jun 13, 2023 at 1:28?PM Jim_B <jim@...> wrote: There used to be a Vendor, who had Steady’s to fit most of the SB lathes. They were custom made in China.? His first name was Jeff.? I can’t remember the company.? I had one for my Heavy 10.? Perhaps you could find one of his.? ? ? Thanks John. Advise when you can. Greg ? I may have one.? I will look around when I can.?? ? Email: jbusch@... ? John ? Minnesota ? On Tue, 13 Jun, 2023 at 9:44 AM, Greg <condor6213@...> wrote: Hey Folks. I am looking for a steady rest for a 10L Heavy. Anybody got a spare you're looking to sell? I know that the 9 & 10K rests are basically the same (or exactly, IDK). But can anyone out there tell me if a steady rest from another SB lathe is the same as (or will fit on) the 10L heavy? Maybe I'm limiting my search too much and need to start looking for steady rests that will fit the 10L heavy AS WELL AS the XXXXX? Thanks, Greg
--
Jim B
|
I have a link belt on my SB9c and it slips a lot. In the machining environment, it's impossible to keep oil off the pullies. It's smooth, but if it doesn't transfer the power...
Steven S
Get
toggle quoted message
Show quoted text
A Gates V belt should be as close to perfect as makes no difference! An earlier post suggested warming it to ease the storage deflections out
of it. I'd do it in a bucket of very hot water, not coiled, and then get it onto the machine as fast as possible while it is till warm and run it at medium speed, good tension, off load for an hour. If it is still causing bother after that, take it back to
the shop. You could try sliding it manually along the V of a pulley and see if there are any obvious high spots, or carefully and lightly caress it with a stick of chalk while it is running to find a high spot. Just hope you don't find a high or low spot on
one of your pulleys when you do this.
Is it a plain or notched belt, incidentally, please? I'd assume a modern cut edge type, not a wrapped one. Notched ones go round small radii easier as they are more flexible.
Eddie (UK)
------ Original Message ------
From: "Rick" <vwrick@...>
To: [email protected]
Sent: Tuesday, 13 Jun, 23 At 21:01
Subject: Re: [SouthBendLathe] V Belt
Get an Accurate-Link belt. They are available at Harbor Freight. I run these on all my machine tools.
|
Bill in OKC too
Nick Andrews
Jim_B
ww_big_al