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Hi folks,
My friend has a 9A horizontal with a VFD. He bought a new Gates V belt but says it's shakes at fast speeds, when he's trying to get a good finish, so put the old one back on. He rebuilt the counter shaft already. Is there are difference between the name brand products?
Thanks,
Payson.
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Hi Payson,
If it is the proper belt, Gates is a good brand and there should
not be a problem.? If the old belt behaves differently but is the
same size, the problem may be the stiffness of the new belt.? It
has likely been folded in the same sleeve for quite a while and
has taken a set.? I would try warming it up, perhaps by setting it
in direct sunlight for a few hours and see if that softens it and
makes a difference.
HTH,
Jack
On 6/12/2023 11:09 PM, Payson wrote:
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Hi folks,
My friend has a 9A horizontal with a VFD. He bought a new Gates V
belt but says it's shakes at fast speeds, when he's trying to get
a good finish, so put the old one back on. He rebuilt the counter
shaft already. Is there are difference between the name brand
products?
Thanks,
Payson.
|
Get an Accurate-Link belt. They are available at Harbor Freight. ?I run these on all my machine tools.
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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)
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------ 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.
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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.
|
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.
|
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.
|
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
?
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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.
|
Payson
