Replaced belt on lathe but keeps coming off

Replaced belt on lathe but keeps coming off

Post by CAMCOMPC » Wed, 21 Sep 2005 10:00:43



Hi gents,

The subject says it all....leather belt, used the alligator belt
lacing, but the belt comes off often when I first engage the power.
Once it gets going, most of the time, it stays put, just about 25% of
the time on initial power up the belt falls off.  Is this because it is
a bit hard (kind of like a baseball mitt when you first start using
it.....

Just wondering if there is a trick to break'n these belts in.

Thanks to all

John

 
 
 

Replaced belt on lathe but keeps coming off

Post by Grant Erwi » Wed, 21 Sep 2005 11:21:07


Quote:

> Hi gents,

> The subject says it all....leather belt, used the alligator belt
> lacing, but the belt comes off often when I first engage the power.
> Once it gets going, most of the time, it stays put, just about 25% of
> the time on initial power up the belt falls off.  Is this because it is
> a bit hard (kind of like a baseball mitt when you first start using
> it.....

It's more likely the result of misaligned sheaves, or some sort of defect in the
belt (a twist or something).

GWE

 
 
 

Replaced belt on lathe but keeps coming off

Post by Ken Cut » Wed, 21 Sep 2005 13:44:18


Quote:

> Hi gents,

> The subject says it all....leather belt, used the alligator belt
> lacing, but the belt comes off often when I first engage the power.
> Once it gets going, most of the time, it stays put, just about 25% of
> the time on initial power up the belt falls off.  Is this because it is
> a bit hard (kind of like a baseball mitt when you first start using
> it.....

> Just wondering if there is a trick to break'n these belts in.

> Thanks to all

> John

Are the ends of the belt square to each other at the join ? If one is
***ed it will get tossed . Personally I would opt for " Clipper " brand
lacing . Luck
Ken Cutt
 
 
 

Replaced belt on lathe but keeps coming off

Post by pdr.. » Thu, 22 Sep 2005 04:24:26


Are you putting the belt on with a 1/2 twist. All the flat belt
machinery I have run always used a half turn to keep them in place. I
am not sure why,however.

Paul

 
 
 

Replaced belt on lathe but keeps coming off

Post by Tom Gardne » Thu, 22 Sep 2005 04:27:43



Quote:
> Hi gents,

> The subject says it all....leather belt, used the alligator belt
> lacing, but the belt comes off often when I first engage the power.
> Once it gets going, most of the time, it stays put, just about 25% of
> the time on initial power up the belt falls off.  Is this because it is
> a bit hard (kind of like a baseball mitt when you first start using
> it.....

> Just wondering if there is a trick to break'n these belts in.

> Thanks to all

> John

Sometimes a little belt dressing will help it stay on track.
 
 
 

Replaced belt on lathe but keeps coming off

Post by CAMCOMPC » Thu, 22 Sep 2005 07:58:32


Not sure about the 1/2 twist thing, belt dressing might do the trick
but seems to be just a temp fix....I'll bet I assumed "close enough for
government work" was close enough, maybe I should re-check the
alignment when I get to the shop next.
I was just wonder'n if I missed some sort of "that always happens" kind
of thing......

Thanks guys

John

 
 
 

Replaced belt on lathe but keeps coming off

Post by Don Youn » Thu, 22 Sep 2005 13:11:21


It might be coming off because it is slipping on the drive sheave during
startup. I have noticed that flat belts often come off when they slip. Just
a thought.
Don Young

Quote:
> Not sure about the 1/2 twist thing, belt dressing might do the trick
> but seems to be just a temp fix....I'll bet I assumed "close enough for
> government work" was close enough, maybe I should re-check the
> alignment when I get to the shop next.
> I was just wonder'n if I missed some sort of "that always happens" kind
> of thing......

> Thanks guys

> John

 
 
 

Replaced belt on lathe but keeps coming off

Post by CAMCOMPC » Sun, 25 Sep 2005 18:25:51


Quick update,
It turned out to be that I had a slight misalignment from end to end.
I undid the glamp, aligned the two ends better, and presto....the belts
were only off by a tiny bit, but, it seemed that this tiny bit was more
than enough to cause the trouble.

thanks to all for the help...once again :-)

John