I decided to improve my Delta 9" disk/6" belt sander. It suffers from
a lot of vibration which I've put up with for many years. I thought
I'd upgrade to a larger/heavier machine but that hasn't happened. So I
got the idea to change the belt to a link belt. (Let's not get into a
debate on the merits of Link belts here. I like them and they have
made big reductions to vibrations on machinery where I've used them.)
I pulled the covers off to discover Delta uses a ribbed belt with like
pulleys on this unit. I pulled the pulleys off and went to a
transmission shop. They matched the sizes and off I went with 2 nicely
machined 1/2" V groove pulleys. I go to put them on and behold, they
don't want to go on the shafts. I have checked them with a micrometer
and they seem to be the exact size of the old pulleys. I oiled the
holes and shafts and have filed edges of the shafts to ensure I don't
have any burrs. They seem to be fine. I haven't resorted to blasting
them with a rubber mallet yet. Is this a common problem? Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.

Neil

Two things you can do...

1. Thoroughly run a file around the shaft to make sure that all areas of the
shaft are really clean and bump/burr/muck free. Repeat on the inside of the
pulley with a round file. Be careful not to totally ruin the parts... If
the shaft has a keyway (which it should!) make sure the keyway is fully
clean and that the key is inserted all the way. If the keyway has a "ramp"
towards the back portion, the key may walk up and jam the pulley. Try
keeping the key out until the pulley is already on if you can (keyway has to
extend to end of shaft).

2. Return the pulleys and/or ream them out slightly larger.

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com
V8013

In or near NJ and ride a Motorcycle: http://tinyurl.com/4zkw8

Young Life? eMail me!





"toolguy" wrote in message
oups.com...
I decided to improve my Delta 9" disk/6" belt sander. It suffers from
a lot of vibration which I've put up with for many years. I thought
I'd upgrade to a larger/heavier machine but that hasn't happened. So I
got the idea to change the belt to a link belt. (Let's not get into a
debate on the merits of Link belts here. I like them and they have
made big reductions to vibrations on machinery where I've used them.)
I pulled the covers off to discover Delta uses a ribbed belt with like
pulleys on this unit. I pulled the pulleys off and went to a
transmission shop. They matched the sizes and off I went with 2 nicely
machined 1/2" V groove pulleys. I go to put them on and behold, they
don't want to go on the shafts. I have checked them with a micrometer
and they seem to be the exact size of the old pulleys. I oiled the
holes and shafts and have filed edges of the shafts to ensure I don't
have any burrs. They seem to be fine. I haven't resorted to blasting
them with a rubber mallet yet. Is this a common problem? Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.

Neil

Run emery paper on the shaft.
WL
"Joe" wrote in message
news:dOV0e.23881$qN3.2461@trndny01...
Two things you can do...

1. Thoroughly run a file around the shaft to make sure that all areas of
the shaft are really clean and bump/burr/muck free. Repeat on the inside
of the pulley with a round file. Be careful not to totally ruin the
parts... If the shaft has a keyway (which it should!) make sure the
keyway is fully clean and that the key is inserted all the way. If the
keyway has a "ramp" towards the back portion, the key may walk up and jam
the pulley. Try keeping the key out until the pulley is already on if you
can (keyway has to extend to end of shaft).

2. Return the pulleys and/or ream them out slightly larger.

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com
V8013

In or near NJ and ride a Motorcycle: http://tinyurl.com/4zkw8

Young Life? eMail me!





"toolguy" wrote in message
oups.com...
I decided to improve my Delta 9" disk/6" belt sander. It suffers from
a lot of vibration which I've put up with for many years. I thought
I'd upgrade to a larger/heavier machine but that hasn't happened. So I
got the idea to change the belt to a link belt. (Let's not get into a
debate on the merits of Link belts here. I like them and they have
made big reductions to vibrations on machinery where I've used them.)
I pulled the covers off to discover Delta uses a ribbed belt with like
pulleys on this unit. I pulled the pulleys off and went to a
transmission shop. They matched the sizes and off I went with 2 nicely
machined 1/2" V groove pulleys. I go to put them on and behold, they
don't want to go on the shafts. I have checked them with a micrometer
and they seem to be the exact size of the old pulleys. I oiled the
holes and shafts and have filed edges of the shafts to ensure I don't
have any burrs. They seem to be fine. I haven't resorted to blasting
them with a rubber mallet yet. Is this a common problem? Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.

Neil

Emery paper on the shaft and heat the pulley. It will expand a couple of
thousandths
max

Run emery paper on the shaft.
WL
"Joe" wrote in message
news:dOV0e.23881$qN3.2461@trndny01...
Two things you can do...

1. Thoroughly run a file around the shaft to make sure that all areas of
the shaft are really clean and bump/burr/muck free. Repeat on the inside
of the pulley with a round file. Be careful not to totally ruin the
parts... If the shaft has a keyway (which it should!) make sure the
keyway is fully clean and that the key is inserted all the way. If the
keyway has a "ramp" towards the back portion, the key may walk up and jam
the pulley. Try keeping the key out until the pulley is already on if you
can (keyway has to extend to end of shaft).

2. Return the pulleys and/or ream them out slightly larger.

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com
V8013

In or near NJ and ride a Motorcycle: http://tinyurl.com/4zkw8

Young Life? eMail me!





"toolguy" wrote in message
oups.com...
I decided to improve my Delta 9" disk/6" belt sander. It suffers from
a lot of vibration which I've put up with for many years. I thought
I'd upgrade to a larger/heavier machine but that hasn't happened. So I
got the idea to change the belt to a link belt. (Let's not get into a
debate on the merits of Link belts here. I like them and they have
made big reductions to vibrations on machinery where I've used them.)
I pulled the covers off to discover Delta uses a ribbed belt with like
pulleys on this unit. I pulled the pulleys off and went to a
transmission shop. They matched the sizes and off I went with 2 nicely
machined 1/2" V groove pulleys. I go to put them on and behold, they
don't want to go on the shafts. I have checked them with a micrometer
and they seem to be the exact size of the old pulleys. I oiled the
holes and shafts and have filed edges of the shafts to ensure I don't
have any burrs. They seem to be fine. I haven't resorted to blasting
them with a rubber mallet yet. Is this a common problem? Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.

Neil

Emery paper on the shaft and heat the pulley. It will expand a couple of
thousandths

Should he ever need to remove the pulley, the heating process might have to
be repeated... I'd suggest getting it the right size to slid on at room
pemperature the first time.

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com
V8013

In or near NJ and ride a Motorcycle: http://tinyurl.com/4zkw8

Young Life? eMail me!

Won't expanding the pulley make the hole smaller?

"max" wrote in message
...
Emery paper on the shaft and heat the pulley. It will expand a couple of
thousandths
max

Run emery paper on the shaft.
WL
"Joe" wrote in message
news:dOV0e.23881$qN3.2461@trndny01...
Two things you can do...

1. Thoroughly run a file around the shaft to make sure that all areas of
the shaft are really clean and bump/burr/muck free. Repeat on the
inside
of the pulley with a round file. Be careful not to totally ruin the
parts... If the shaft has a keyway (which it should!) make sure the
keyway is fully clean and that the key is inserted all the way. If the
keyway has a "ramp" towards the back portion, the key may walk up and
jam
the pulley. Try keeping the key out until the pulley is already on if
you
can (keyway has to extend to end of shaft).

2. Return the pulleys and/or ream them out slightly larger.

Regards,
Joe Agro, Jr.
http://www.autodrill.com
http://www.multi-drill.com
V8013

In or near NJ and ride a Motorcycle: http://tinyurl.com/4zkw8

Young Life? eMail me!





"toolguy" wrote in message
oups.com...
I decided to improve my Delta 9" disk/6" belt sander. It suffers from
a lot of vibration which I've put up with for many years. I thought
I'd upgrade to a larger/heavier machine but that hasn't happened. So I
got the idea to change the belt to a link belt. (Let's not get into a
debate on the merits of Link belts here. I like them and they have
made big reductions to vibrations on machinery where I've used them.)
I pulled the covers off to discover Delta uses a ribbed belt with like
pulleys on this unit. I pulled the pulleys off and went to a
transmission shop. They matched the sizes and off I went with 2 nicely
machined 1/2" V groove pulleys. I go to put them on and behold, they
don't want to go on the shafts. I have checked them with a micrometer
and they seem to be the exact size of the old pulleys. I oiled the
holes and shafts and have filed edges of the shafts to ensure I don't
have any burrs. They seem to be fine. I haven't resorted to blasting
them with a rubber mallet yet. Is this a common problem? Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.

Neil

"Don" wrote in message
k.net...
Won't expanding the pulley make the hole smaller?



Nope, when you heat a ring shape, such as a pulley, the hole will get
larger.
Greg

"toolguy" wrote in message
oups.com...
I decided to improve my Delta 9" disk/6" belt sander. It suffers from
a lot of vibration which I've put up with for many years. I thought
I'd upgrade to a larger/heavier machine but that hasn't happened. So I
got the idea to change the belt to a link belt. (Let's not get into a
debate on the merits of Link belts here. I like them and they have
made big reductions to vibrations on machinery where I've used them.)
I pulled the covers off to discover Delta uses a ribbed belt with like
pulleys on this unit. I pulled the pulleys off and went to a
transmission shop. They matched the sizes and off I went with 2 nicely
machined 1/2" V groove pulleys. I go to put them on and behold, they
don't want to go on the shafts. I have checked them with a micrometer
and they seem to be the exact size of the old pulleys. I oiled the
holes and shafts and have filed edges of the shafts to ensure I don't
have any burrs. They seem to be fine. I haven't resorted to blasting
them with a rubber mallet yet. Is this a common problem? Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.

Neil


Evidently they are not the same size. If cleaning all the burrs, keyway
size and height are correct, then the hole is too small.

Dave (Who won't bother with the link belt issue)



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"toolguy" wrote in message
oups.com...
Any thoughts
to resolve this issue will be appreciated.

Neil


Are you certain that the shaft and new pulleys are the right size? I
question whether this sander is made "over seas" and may be metric.
Greg

"toolguy" wrote in message
oups.com...
I decided to improve my Delta 9" disk/6" belt sander. Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.

Neil


Is this the sander? Model 31-695?
http://www.deltawoodworking.com/index.asp?e=136&p=830
If it is then the shafts are definitely metric.
Greg

That's it! Thanks for pointing out my oversight. They measured the
old pulleys and assumed they were 5/8". When in fact they are 16 mm
shafts. The 5/8" pulleys they sold me are about 15.8 mm. Back to the
store!

"toolguy" wrote:

Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.


No need to use hammers or open out the holes. Just stick the pulleys
in a pan of boiling water for ten minutes - they will fly on easily.


--

On Fri, 25 Mar 2005 18:15:07 +0000, No Spam
wrote:

"toolguy" wrote:

Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.


No need to use hammers or open out the holes. Just stick the pulleys
in a pan of boiling water for ten minutes - they will fly on easily.

....Never to be removed.

--
LRod

Master Woodbutcher and seasoned termite

Shamelessly whoring my website since 1999

http://www.woodbutcher.net

Proud participant of rec.woodworking since February, 1997

Oh, the pulley can be removed, all right. I have worked with machinery drive
coupling halves of 1,400 lbs weight, with a 12" bore, 24" through the hub,
with a 2" square key. They are heated and installed with a .002 inch of
shrink fit for each inch of shaft diameter, being .024 undersize in this
case. Whenever removal is necessary, heat and a puller is used, same as most
cases, just a hell of a lot bigger hydraulic one. Hopefully the pulleys one
has aren't potmetal G In any case anti-sieze compound should be used for
this type of mechanical assembly. It makes installation and removal much
easier, and reduces broaching of the bore. In general, keys should be
pre-fitted by marking the "top" of the key to retain orientation. Fit the
key to the shaft by dressing key and shaft carefully with a file to match,
then fit key to hub using same method. Fit hub to shaft by polishing with
abrasive cloth, considering whether it will be a shrink or a slide fit. Mark
top of key of a slide fit with magic marker and attempt to install pulley
over it. Alternately, key height can be measured with the proper tools. If
it doesn't go, file the top of the key to remove scratch marks left by the
hub until it does. The height of the key should normally be the only factor
left at this point, barring unseen complications. This is a tried and true
millwright technique that works. I hope this can help someone along the way.

RJ, Millwright foreman of days gone by.

"LRod" wrote in message
...
On Fri, 25 Mar 2005 18:15:07 +0000, No Spam
wrote:

"toolguy" wrote:

Is there a
"trick" to getting snug fitting new pulleys on shafts? Any thoughts
to resolve this issue will be appreciated.


No need to use hammers or open out the holes. Just stick the pulleys
in a pan of boiling water for ten minutes - they will fly on easily.

...Never to be removed.

--
LRod

Master Woodbutcher and seasoned termite

Shamelessly whoring my website since 1999

http://www.woodbutcher.net

Proud participant of rec.woodworking since February, 1997